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description Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2022 Belgium, Netherlands, United Kingdom, ItalyPublisher:California Digital Library (CDL) Funded by:NSF | Collaborative Research: E..., NSF | Collaborative Research: E...NSF| Collaborative Research: Eocene Orbital-scale Oceanographic Variability in the North Atlantic: Inferences from Expedition 342 Cores ,NSF| Collaborative Research: Eocene Orbital-scale Oceanographic Variability in the North Atlantic: Inferences from Expedition 342 CoresDe Vleeschouwer, David; Penman, Donald E.; D'haenens, Simon; Wu, Fei; Westerhold, Thomas; Vahlenkamp, Maximilian; Cappelli, Carlotta; Agnini, Claudia; Kordesch, Wendy E. C.; King, Daniel J.; van der Ploeg, Robin; Pälike, Heiko; Turner, Sandra Kirtland; Wilson, Paul; Norris, Richard D.; Zachos, James C.; Bohaty, Steven M.; Hull, Pincelli M.; Penman, Donald E.; 3 Department of Geosciences Utah State University Logan UT USA; D'haenens, Simon; 4 Department of Earth and Planetary Sciences Yale University New Haven CT USA; Wu, Fei; 7 School of Earth Sciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan China; Westerhold, Thomas; 2 MARUM ‐ Center for Marine Environmental Sciences University of Bremen Bremen Germany; Vahlenkamp, Maximilian; 2 MARUM ‐ Center for Marine Environmental Sciences University of Bremen Bremen Germany; Cappelli, Carlotta; 8 Dipartimento di Geoscienze Università di Padova Padova Italy; Agnini, Claudia; 8 Dipartimento di Geoscienze Università di Padova Padova Italy; Kordesch, Wendy E. C.; 9 Greater Farallones Association San Francisco CA USA; King, Daniel J.; 10 School of Geography, Environment, and Earth Sciences Victoria University of Wellington Wellington New Zealand; van der Ploeg, Robin; 11 Department of Earth Sciences Utrecht University Utrecht The Netherlands; Pälike, Heiko; 2 MARUM ‐ Center for Marine Environmental Sciences University of Bremen Bremen Germany; Turner, Sandra Kirtland; 13 Department of Earth and Planetary Sciences University of California – Riverside Riverside CA USA; Wilson, Paul; 14 Ocean and Earth Science University of Southampton National Oceanography Centre Southampton UK; Norris, Richard D.; 15 Center for Marine Biodiversity and Conservation Scripps Institution of Oceanography University of California San Diego La Jolla CA USA; Zachos, James C.; 16 Department of Earth & Planetary Science University of California Santa Cruz CA USA; Bohaty, Steven M.; 14 Ocean and Earth Science University of Southampton National Oceanography Centre Southampton UK; Hull, Pincelli M.; 4 Department of Earth and Planetary Sciences Yale University New Haven CT USA;handle: 11577/3479880
Plain Language Summary: The traditional cyclostratigraphic approach is to align and correlate a geologic depth‐series with an astronomical solution. However, the chaotic nature of the Solar System prevents astronomers from precisely calculating planetary motions beyond 40–50 million years ago. This in turn limits the options for geologists to use the resulting oscillations in Earth's climate system as a metronome for determining geologic time. In this study, we reversed the cyclostratigraphic approach and used the highly rhythmical sedimentary deposits from Newfoundland Ridge (North Atlantic) to back‐calculate planetary motions at ∼41 million years ago. The superior quality of the Newfoundland Ridge geoarchive originates from the combination of relatively high sedimentation rates (∼4 cm/kyr) and the time‐continuous character of our two‐site composite record between 39.5 and 42.8 million years ago. In this work, we had to first overcome considerable challenges in reconstructing the timing of sediment deposition, which we did with highly resolved geochemical measurements from two sites. We then were able to extract information on the Earth's planetary motion and on the Earth‐Moon interactions. These astronomical reconstructions based on geological data can now be used by astronomers to describe the evolution of the solar system further back in time than was previously possible. Cyclostratigraphy and astrochronology are now at the forefront of geologic timekeeping. While this technique heavily relies on the accuracy of astronomical calculations, solar system chaos limits how far back astronomical calculations can be performed with confidence. High‐resolution paleoclimate records with Milankovitch imprints now allow reversing the traditional cyclostratigraphic approach: Middle Eocene drift sediments from Newfoundland Ridge are well‐suited for this purpose, due to high sedimentation rates and distinct lithological cycles. Per contra, the stratigraphies of Integrated Ocean Drilling Program Sites U1408–U1410 are highly complex with several hiatuses. Here, we built a two‐site composite and constructed a conservative age‐depth model to provide a reliable chronology for this rhythmic, highly resolved (4–g3 “grand eccentricity cycle” may have had a 1.2‐Myr period around 41 Ma, contrary to its 2.4‐Myr periodicity today. Our median precession constant estimate (51.28 ± 0.56″/year) confirms earlier indicators of a relatively low rate of tidal dissipation in the Paleogene. Newfoundland Ridge drift sediments thus enable a reliable reconstruction of astronomical components at the limit of validity of current astronomical calculations, extracted from geologic data, providing a new target for the next generation of astronomical calculations. Key Points: A new precession‐based cyclostratigraphy for the middle Eocene intervals of IODP Sites U1408 and U1410. Variability in astronomical fundamental frequencies (g‐terms) on million‐year timescales is larger than previously assumed. Our precession constant estimate for 41 Ma (51.28 ± 0.56″/year) confirms earlier indicators of slower tidal dissipation in the Paleogene. Belgian American Educational Foundation http://dx.doi.org/10.13039/100001491 National Science Foundation http://dx.doi.org/10.13039/100000001 University of California http://dx.doi.org/10.13039/100005595 https://paloz.marum.de/confluence/display/ESPUBLIC/NAFF https://paloz.marum.de/AstroComputation/index.html
Archivio istituziona... arrow_drop_down Paleoceanography and PaleoclimatologyArticle . 2023 . Peer-reviewedLicense: CC BYData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 6visibility views 6 download downloads 1 Powered bymore_vert Archivio istituziona... arrow_drop_down Paleoceanography and PaleoclimatologyArticle . 2023 . Peer-reviewedLicense: CC BYData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2017 Italy, Italy, Denmark, Netherlands, United Kingdom, ItalyPublisher:Copernicus GmbH E. R. Thomas; J. M. van Wessem; J. Roberts; J. Roberts; E. Isaksson; E. Schlosser; E. Schlosser; T. J. Fudge; P. Vallelonga; B. Medley; J. Lenaerts; N. Bertler; N. Bertler; M. R. van den Broeke; D. A. Dixon; M. Frezzotti; B. Stenni; B. Stenni; M. Curran; A. A. Ekaykin; A. A. Ekaykin;handle: 20.500.12079/1482 , 11590/353558 , 1874/357779 , 10278/3694428
Abstract. Here we present Antarctic snow accumulation variability at the regional scale over the past 1000 years. A total of 79 ice core snow accumulation records were gathered and assigned to seven geographical regions, separating the high-accumulation coastal zones below 2000 m of elevation from the dry central Antarctic Plateau. The regional composites of annual snow accumulation were evaluated against modelled surface mass balance (SMB) from RACMO2.3p2 and precipitation from ERA-Interim reanalysis. With the exception of the Weddell Sea coast, the low-elevation composites capture the regional precipitation and SMB variability as defined by the models. The central Antarctic sites lack coherency and either do not represent regional precipitation or indicate the model inability to capture relevant precipitation processes in the cold, dry central plateau. Our results show that SMB for the total Antarctic Ice Sheet (including ice shelves) has increased at a rate of 7 ± 0.13 Gt decade−1 since 1800 AD, representing a net reduction in sea level of ∼ 0.02 mm decade−1 since 1800 and ∼ 0.04 mm decade−1 since 1900 AD. The largest contribution is from the Antarctic Peninsula (∼ 75 %) where the annual average SMB during the most recent decade (2001–2010) is 123 ± 44 Gt yr−1 higher than the annual average during the first decade of the 19th century. Only four ice core records cover the full 1000 years, and they suggest a decrease in snow accumulation during this period. However, our study emphasizes the importance of low-elevation coastal zones, which have been under-represented in previous investigations of temporal snow accumulation.
Archivio istituziona... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2017Climate of the Past (CP); NERC Open Research ArchiveOther literature type . Article . 2017 . 2018 . Peer-reviewedCopenhagen University Research Information SystemArticle . 2017Data sources: Copenhagen University Research Information SystemArchivio della Ricerca - Università degli Studi Roma TreArticle . 2017Data sources: Archivio della Ricerca - Università degli Studi Roma Treadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-13-1491-2017&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 108 citations 108 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 7visibility views 7 download downloads 81 Powered bymore_vert Archivio istituziona... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2017Climate of the Past (CP); NERC Open Research ArchiveOther literature type . Article . 2017 . 2018 . Peer-reviewedCopenhagen University Research Information SystemArticle . 2017Data sources: Copenhagen University Research Information SystemArchivio della Ricerca - Università degli Studi Roma TreArticle . 2017Data sources: Archivio della Ricerca - Università degli Studi Roma Treadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-13-1491-2017&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2016 United Kingdom, Australia, Netherlands, Netherlands, Belgium, Netherlands, Belgium, GermanyPublisher:Copernicus GmbH Funded by:ARC | Tipping points in Records..., ARC | Reconstructing changes in..., ARC | Understanding the drivers... +1 projectsARC| Tipping points in Records of Extreme Events in Australasia: Using the Past to Understand and Plan for Abrupt Future Climate Change ,ARC| Reconstructing changes in atmospheric circulation over the mid-latitudes of the Southern Hemisphere during the past 3000 years ,ARC| Understanding the drivers and impacts of long-term Antarctic ice sheet change ,ARC| Inter-ocean exchange around Australia and its relation to regional and global climateAuthors: Chris S. M. Turney; Christopher J. Fogwill; Jonathan G. Palmer; Erik van Sebille; +20 AuthorsChris S. M. Turney; Christopher J. Fogwill; Jonathan G. Palmer; Erik van Sebille; Zoë Thomas; Matt S. McGlone; Sarah J. Richardson; Janet M. Wilmshurst; Pavla Fenwick; Violette Zunz; Hugues Goosse; Kerry-Jayne Wilson; Lionel Carter; Mathew Lipson; Richard T. Jones; Melanie A. Harsch; Graeme F. Clark; Ezequiel M. Marzinelli; Tracey L. Rogers; Eleanor Rainsley; Laura M. Ciasto; Stephanie Waterman; Elizabeth R. Thomas; Martin Visbeck;Abstract. Occupying about 14 % of the world's surface, the Southern Ocean plays a fundamental role in ocean and atmosphere circulation, carbon cycling and Antarctic ice-sheet dynamics. Unfortunately, high interannual variability and a dearth of instrumental observations before the 1950s limits our understanding of how marine–atmosphere–ice domains interact on multi-decadal timescales and the impact of anthropogenic forcing. Here we integrate climate-sensitive tree growth with ocean and atmospheric observations on southwest Pacific subantarctic islands that lie at the boundary of polar and subtropical climates (52–54° S). Our annually resolved temperature reconstruction captures regional change since the 1870s and demonstrates a significant increase in variability from the 1940s, a phenomenon predating the observational record. Climate reanalysis and modelling show a parallel change in tropical Pacific sea surface temperatures that generate an atmospheric Rossby wave train which propagates across a large part of the Southern Hemisphere during the austral spring and summer. Our results suggest that modern observed high interannual variability was established across the mid-twentieth century, and that the influence of contemporary equatorial Pacific temperatures may now be a permanent feature across the mid- to high latitudes.
CORE (RIOXX-UK Aggre... arrow_drop_down NERC Open Research ArchiveArticle . 2017 . Peer-reviewedFull-Text: http://nora.nerc.ac.uk/515555/1/Turney.pdfData sources: NERC Open Research ArchiveNARCIS; Utrecht University RepositoryArticle . 2017https://doi.org/10.5194/cp-201...Preprint . 2016 . Peer-reviewedLicense: CC BYData sources: CrossrefVrije Universiteit Brussel Research PortalArticle . 2017Data sources: Vrije Universiteit Brussel Research PortalSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-2016-114&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 23 citations 23 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 9visibility views 9 download downloads 74 Powered bymore_vert CORE (RIOXX-UK Aggre... arrow_drop_down NERC Open Research ArchiveArticle . 2017 . Peer-reviewedFull-Text: http://nora.nerc.ac.uk/515555/1/Turney.pdfData sources: NERC Open Research ArchiveNARCIS; Utrecht University RepositoryArticle . 2017https://doi.org/10.5194/cp-201...Preprint . 2016 . Peer-reviewedLicense: CC BYData sources: CrossrefVrije Universiteit Brussel Research PortalArticle . 2017Data sources: Vrije Universiteit Brussel Research PortalSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-2016-114&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 NetherlandsPublisher:Wiley Funded by:NSF | SitS: Decoding microbial ..., NIH | Lake Erie Center for the ..., NSF | CAREER: Geochemical and f... +2 projectsNSF| SitS: Decoding microbial interactions in soil systems using subsurface sensors for volatile organic compounds ,NIH| Lake Erie Center for the Great Lakes and Human Health ,NSF| CAREER: Geochemical and functional controls of methane-mediating microbes in Amazon peatlands ,NSF| LTREB Renewal: Drivers of temperate forest carbon storage from canopy closure through successional time ,NSF| Lake Erie Center for Fresh Waters and Human HealthDwivedi, Dipankar; Santos, A L D; Barnard, M A; Crimmins, T M; Malhotra, A; Rod, K A; Aho, K S; Bell, S M; Bomfim, B; Brearley, F Q; Cadillo-Quiroz, H.; Chen, J.; Chen, T.Y.; Gough, C.M.; Graham, E.B.; Hakkenberg, C.R.; Haygood, L.; Koren, Gerbrand; Lilleskov, E.; Meredith, L.K.; Naeher, S.; Nickerson, Z.L.; Pourret, O.; Song, H.-S.; Stahl, M.; Tas, N.; Vargas, R.; Weintraub-Leff, S.; Global Ecohydrology and Sustainability; Environmental Sciences;handle: 1874/426874
This article is composed of three independent commentaries about the state of ICON principles (Goldman et al. 2021) in the AGU Biogeosciences section and discussion on the opportunities and challenges of adopting them. Each commentary focuses on a different topic: Global collaboration, technology transfer and application (Section 2), Community engagement, citizen science, education, and stakeholder involvement (Section 3), and Field, experimental, remote sensing, and real-time data research and application (Section 4). We discuss needs and strategies for implementing ICON and outline short- and long-term goals. The inclusion of global data and international community engagement are key to tackle grand challenges in biogeosciences. Although recent technological advances and growing open-access information across the world have enabled global collaborations to some extent, several barriers ranging from technical to organizational to cultural have remained in advancing interoperability and tangible scientific progress in biogeosciences. Overcoming these hurdles is necessary to address pressing large-scale research questions and applications in the biogeosciences, where ICON principles are essential. Here, we list several opportunities for ICON, including coordinated experimentation and field observations across global sites, that are ripe for implementation in biogeosciences as a means to scientific advancements and social progress.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/essoar.10508474.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Preprint 2020 Netherlands, SpainPublisher:Copernicus GmbH Hoem, Frida S.; Valero, Luis; Evangelinos, Dimitris; Escutia, Carlota; Duncan, Bella; McKay, Robert M.; Brinkhuis, Henk; Sangiorgi, Francesca; Bijl, Peter K.; Marine palynology and palaeoceanography; Marine Palynology;handle: 10481/69999 , 1874/412742
Antarctic continental ice masses fluctuated considerably during the Oligocene "coolhouse", at elevated atmospheric CO2 concentrations of similar to 600-800 ppm. To assess the role of the ocean in the Oligocene ice sheet variability, reconstruction of past ocean conditions in the proximity of the Antarctic margin is needed. While relatively warm ocean conditions have been reconstructed for the Oligocene offshore of Wilkes Land, the geographical extent of that warmth is unknown. In this study, we reconstruct past surface ocean conditions from glaciomarine sediments recovered from Deep Sea Drilling Project (DSDP) Site 274 offshore of the Ross Sea continental margin. This site, located offshore of Cape Adare is ideally situated to characterise Oligocene regional surface ocean conditions, as it is situated between the colder, higher-latitude Ross Sea continental shelf and the warm-temperate Wilkes Land margin in the Oligocene. We first improve the age model of DSDP Site 274 using integrated bio- and magnetostratigraphy. Subsequently, we analyse organic walled dinoflagellate cyst assemblages and lipid biomarkers (TEX86, TetraEther indeX of 86 carbon atoms) to reconstruct surface palaeoceanographic conditions during the Oligocene (33.7-24.4 Ma). Both TEX86 based sea surface temperature (SST) and microplankton results show temperate (10-17 degrees C +/- 5.2 degrees C) surface ocean conditions at Site 274 throughout the Oligocene. Oceanographic conditions between the offshore Wilkes Land margin and Cape Adare became increasingly similar towards the late Oligocene (26.5-24.4 Ma); this is inferred to be the consequence of the widening of the Tasmanian Gateway, which resulted in more interconnected ocean basins and frontal systems. Maintaining marine terminations of terrestrial ice sheets in a proto-Ross Sea with offshore SSTs that are as warm as those suggested by our data requires a strong ice flux fed by intensive precipitation in the Antarctic hinterland during colder orbital states but with extensive surface melt of terrestrial ice during warmer orbital states. This research has been supported by the NWO Polar Programme (grant no. ALW.2016.001.); the Spanish Ministry of Economy, Industry and Competitiveness (grant no. CTM2017-89711-C2-1-P/CTM2017-89711-C2-2-P), co-funded by the European Union through FEDER funds; and the Alexander S. Onassis Public Benefit Foundation PhD research grant (grant no. F ZL 016-1/2015-2016). Spanish Ministry of Economy, Industry and Competitiveness CTM2017-89711-C2-1-P/CTM2017-89711-C2-2-P Alexander S. Onassis Public Benefit Foundation PhD research grant F ZL 016-1/2015-2016 European Union through FEDER funds NWO Polar Programme ALW.2016.001
NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2021Copernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationshttps://doi.org/10.5194/cp-202...Preprint . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefRecolector de Ciencia Abierta, RECOLECTA; Repositorio Institucional Universidad de GranadaOther literature type . Article . 2021License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 9 citations 9 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2021Copernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationshttps://doi.org/10.5194/cp-202...Preprint . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefRecolector de Ciencia Abierta, RECOLECTA; Repositorio Institucional Universidad de GranadaOther literature type . Article . 2021License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-2020-139&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2014 Netherlands, GermanyPublisher:Copernicus GmbH Funded by:NWO | The Dawn of a Greenhouse ..., EC | DINOPRONWO| The Dawn of a Greenhouse Earth: climate and carbon cycle dynamics of the Paleocene ,EC| DINOPROContreras, L.; Pross, J.; Bijl, P.K.; O'Hara, R.B.; Raine, J.I.; Sluijs, A.; Brinkhuis, H.; NWO-NNPP: Reconstructing the evolution and dynamics of the Antarctic cryosphere from Ocean Drilling; a dinoflagellate perspective; NWO-VENI: The Dawn of Greenhouse Earth: climate and carbon cycle dynamics of the Palaeocene; Marine palynology and palaeoceanography;handle: 1874/307322
Reconstructing the early Palaeogene climate dynamics of terrestrial settings in the high southern latitudes is important to assess the role of high-latitude physical and biogeochemical processes in the global climate system. However, whereas a number of high-quality Palaeogene climate records has become available for the marine realm of the high southern latitudes over the recent past, the long-term evolution of coeval terrestrial climates and ecosystems is yet poorly known. We here explore the climate and vegetation dynamics on Tasmania from the middle Palaeocene to the early Eocene (60.7–54.2 Ma) based on a sporomorph record from Ocean Drilling Program (ODP) Site 1172 on the East Tasman Plateau. Our results show that three distinctly different vegetation types thrived on Tasmania under a high-precipitation regime during the middle Palaeocene to early Eocene, with each type representing different temperature conditions: (i) warm-temperate forests dominated by gymnosperms that were dominant during the middle and late Palaeocene (excluding the middle/late Palaeocene transition); (ii) cool-temperate forests dominated by southern beech (Nothofagus) and araucarians that transiently prevailed across the middle/late Palaeocene transition interval (~ 59.5 to ~ 59.0 Ma); and (iii) paratropical forests rich in ferns that were established during and in the wake of the Palaeocene–Eocene Thermal Maximum (PETM). The transient establishment of cool-temperate forests lacking any frost-sensitive elements (i.e. palms and cycads) across the middle/late Palaeocene transition interval indicates markedly cooler conditions, with the occurrence of frosts in winter, on Tasmania during that time. The integration of our sporomorph data with previously published TEX86-based sea-surface temperatures from ODP Site 1172 documents that the vegetation dynamics on Tasmania were closely linked with the temperature evolution in the Tasman sector of the Southwest Pacific region. Moreover, the comparison of our season-specific climate estimates for the sporomorph assemblages from ODP Site 1172 with the TEX86L- and TEX86H-based temperature data suggests a warm bias of both calibrations for the early Palaeogene of the high southern latitudes.
NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2014Hochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am MainClimate of the Past (CP); Climate of the PastArticle . Preprint . 2014 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am Mainadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 31 citations 31 popularity Top 10% influence Average impulse Average Powered by BIP!more_vert NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2014Hochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am MainClimate of the Past (CP); Climate of the PastArticle . Preprint . 2014 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am Mainadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2018 Netherlands, SpainPublisher:Copernicus GmbH Funded by:NWO | Reconstructing the the ev..., NWO | The Dawn of a Greenhouse ...NWO| Reconstructing the the evolution and dynamics of the Antarctic cryosphere from Ocean Drilling; a dinoflagellate perspective ,NWO| The Dawn of a Greenhouse Earth: climate and carbon cycle dynamics of the PaleoceneSalabarnada, Ariadna; Escutia, Carlota; Röhl, Ursula; Nelson, C. Hans; McKay, Robert; Jiménez-Espejo, Francisco J.; Bijl, Peter K.; Hartman, Julian D.; Strother, Stephanie L.; Salzmann, Ulrich; Evangelinos, Dimitris; López-Quirós, Adrián; Flores, José Abel; Sangiorgi, Francesca; Ikehara, Minoru; Brinkhuis, Henk; Marine palynology and palaeoceanography; Marine Palynology;handle: 10261/214722 , 1874/366652
Antarctic ice sheet and Southern Ocean paleoceanographic configurations during the late Oligocene are not well resolved. They are however important to understand the influence of high-latitude Southern Hemisphere feedbacks on global climate under CO scenarios (between 400 and 750 ppm) projected by the IPCC for this century, assuming unabated CO emissions. Sediments recovered by the Integrated Ocean Drilling Program (IODP) at Site U1356, offshore of the Wilkes Land margin in East Antarctica, provide an opportunity to study ice sheet and paleoceanographic configurations during the late Oligocene (26-25 Ma). Our study, based on a combination of sediment facies analysis, magnetic susceptibility, density, and X-ray fluorescence geochemical data, shows that glacial and interglacial sediments are continuously reworked by bottom currents, with maximum velocities occurring during the interglacial periods. Glacial sediments record poorly ventilated, low-oxygenation bottom water conditions, interpreted as resulting from a northward shift of westerly winds and surface oceanic fronts. Interglacial sediments record more oxygenated and ventilated bottom water conditions and strong current velocities, which suggests enhanced mixing of the water masses as a result of a southward shift of the polar front. Intervals with preserved carbonated nannofossils within some of the interglacial facies are interpreted as forming under warmer paleoclimatic conditions when less corrosive warmer northern component water (e.g., North Atlantic sourced deep water) had a greater influence on the site. Spectral analysis on the late Oligocene sediment interval shows that the glacial-interglacial cyclicity and related displacements of the Southern Ocean frontal systems between 26 and 25Ma were forced mainly by obliquity. The paucity of iceberg-rafted debris (IRD) throughout the studied interval contrasts with earlier Oligocene and post-Miocene Climate Optimum sections from Site U1356 and with late Oligocene strata from the Ross Sea, which contain IRD and evidence for coastal glaciers and sea ice. These observations, supported by elevated sea surface paleotemperatures, the absence of sea ice, and reconstructions of fossil pollen between 26 and 25 Ma at Site U1356, suggest that open-ocean water conditions prevailed. Combined, this evidence suggests that glaciers or ice caps likely occupied the topographic highs and lowlands of the now marine Wilkes Subglacial Basin (WSB). Unlike today, the continental shelf was not overdeepened and thus ice sheets in the WSB were likely land-based, and marine-based ice sheet expansion was likely limited to coastal regions. This research used samples and data provided by the Integrated Ocean Drilling Program, now the International Ocean Discovery Program (IODP). We thank thestaff onboard IODP Exp. 318 and at the Gulf Coast, the Bremen, and the Kochi IODP core repositories for assistance in core handling and shipping. We thank Vera Lukies (MARUM) for technical support with XRF core scanning and Shizu Yanagimoto (KOCHI) fortechnical supportwith CT scans.We alsothank theconstructive comments of an anonymous reviewer and Steven Pekar that have helped to improve this paper. Funding for this research is provided by the Spanish Ministerio de Economía y Competitividad (grants CTM 2011-24079 and CTM2014-60451-C2-1-P), co-funded by the European Union through FEDER funds. Ulrich Salzmann thanks the Deutsche Forschungsgemeinschaft (DFG) (RO 1113/6). Peter K. Bijl, Francesca Sangiorgi, and Julian D. Hartman acknowledge funding through the NWO polar programme grant no 866.10.110. Peter K. Bijl acknowledges funding through NWO-VENI grant no 863.13.002. Ulrich Salzmann acknowledges funding received from the Natural Environment Research Council (NERC grant NE/H000984/1).
CORE (RIOXX-UK Aggre... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2018add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 39 citations 39 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 22visibility views 22 download downloads 178 Powered bymore_vert CORE (RIOXX-UK Aggre... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2018add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 Italy, United Kingdom, France, Germany, NetherlandsPublisher:Springer Science and Business Media LLC Funded by:UKRI | FEC recovery for co-chief..., UKRI | Testing the amplitude and..., UKRI | Evolution of Carbon Cycle... +1 projectsUKRI| FEC recovery for co-chief scientist duties of Dr Heiko Pälike for IODP Expedition 320 ,UKRI| Testing the amplitude and rapidity of carbonate saturation change and global climate during the high pCO2 Oligocene 'cold house' ,UKRI| Evolution of Carbon Cycle Dynamics (eCCD) ,UKRI| Testing and modelling a transient episode of ocean acidification prior to the Eocene-Oligocene onset of the Cenozoic 'ice house'Heiko Pälike; Mitchell W Lyle; Hiroshi Nishi; Isabella Raffi; Andy Ridgwell; Kusali Gamage; Adam Klaus; Gary D Acton; L. Anderson; Jan Backman; Jack G. Baldauf; Catherine Beltran; Steven M Bohaty; Paul R. Bown; W.H. Busch; James E.T. Channell; Cecily O J Chun; Margaret Lois Delaney; Pawan Dewangan; Tom Dunkley Jones; Kirsty M. Edgar; Helen F Evans; Peter Fitch; Gavin L. Foster; Nikolaus Gussone; Hitoshi Hasegawa; Ed C Hathorne; Hiroki Hayashi; Jens O. Herrle; Ann Holbourn; Steve Hovan; Kiseong Hyeong; Koichi Iijima; Takashi Ito; Shin-Ichi Kamikuri; Katsunori Kimoto; Junichiro Kuroda; Lizette Leon-Rodriguez; Alberto Malinverno; Theodore C. Moore; Brandon Murphy; Daniel P Murphy; Hideto Nakamura; Kaoru Ogane; Christian Ohneiser; Carl Richter; Rebecca S. Robinson; Eelco J. Rohling; Oscar E Romero; Ken Sawada; Howie D. Scher; Leah Schneider; Appy Sluijs; Hiroyuki Takata; Jun Tian; Akira Tsujimoto; Bridget S. Wade; Thomas Westerhold; Roy H Wilkens; Trevor Williams; Paul A. Wilson; Yuhji Yamamoto; Shinya Yamamoto; Toshitsugu Yamazaki; Richard E. Zeebe;doi: 10.1038/nature11360
pmid: 22932380
Atmospheric carbon dioxide concentrations and climate are regulated on geological timescales by the balance between carbon input from volcanic and metamorphic outgassing and its removal by weathering feedbacks; these feedbacks involve the erosion of silicate rocks and organic-carbon-bearing rocks. The integrated effect of these processes is reflected in the calcium carbonate compensation depth, which is the oceanic depth at which calcium carbonate is dissolved. Here we present a carbonate accumulation record that covers the past 53 million years from a depth transect in the equatorial Pacific Ocean. The carbonate compensation depth tracks long-term ocean cooling, deepening from 3.0-3.5 kilometres during the early Cenozoic (approximately 55 million years ago) to 4.6 kilometres at present, consistent with an overall Cenozoic increase in weathering. We find large superimposed fluctuations in carbonate compensation depth during the middle and late Eocene. Using Earth system models, we identify changes in weathering and the mode of organic-carbon delivery as two key processes to explain these large-scale Eocene fluctuations of the carbonate compensation depth. International audience
OceanRep arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2012NARCIS; Utrecht University RepositoryArticle . 2012add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 298 citations 298 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 2visibility views 2 Powered bymore_vert OceanRep arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2012NARCIS; Utrecht University RepositoryArticle . 2012add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2022 Belgium, Netherlands, United Kingdom, ItalyPublisher:California Digital Library (CDL) Funded by:NSF | Collaborative Research: E..., NSF | Collaborative Research: E...NSF| Collaborative Research: Eocene Orbital-scale Oceanographic Variability in the North Atlantic: Inferences from Expedition 342 Cores ,NSF| Collaborative Research: Eocene Orbital-scale Oceanographic Variability in the North Atlantic: Inferences from Expedition 342 CoresDe Vleeschouwer, David; Penman, Donald E.; D'haenens, Simon; Wu, Fei; Westerhold, Thomas; Vahlenkamp, Maximilian; Cappelli, Carlotta; Agnini, Claudia; Kordesch, Wendy E. C.; King, Daniel J.; van der Ploeg, Robin; Pälike, Heiko; Turner, Sandra Kirtland; Wilson, Paul; Norris, Richard D.; Zachos, James C.; Bohaty, Steven M.; Hull, Pincelli M.; Penman, Donald E.; 3 Department of Geosciences Utah State University Logan UT USA; D'haenens, Simon; 4 Department of Earth and Planetary Sciences Yale University New Haven CT USA; Wu, Fei; 7 School of Earth Sciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan China; Westerhold, Thomas; 2 MARUM ‐ Center for Marine Environmental Sciences University of Bremen Bremen Germany; Vahlenkamp, Maximilian; 2 MARUM ‐ Center for Marine Environmental Sciences University of Bremen Bremen Germany; Cappelli, Carlotta; 8 Dipartimento di Geoscienze Università di Padova Padova Italy; Agnini, Claudia; 8 Dipartimento di Geoscienze Università di Padova Padova Italy; Kordesch, Wendy E. C.; 9 Greater Farallones Association San Francisco CA USA; King, Daniel J.; 10 School of Geography, Environment, and Earth Sciences Victoria University of Wellington Wellington New Zealand; van der Ploeg, Robin; 11 Department of Earth Sciences Utrecht University Utrecht The Netherlands; Pälike, Heiko; 2 MARUM ‐ Center for Marine Environmental Sciences University of Bremen Bremen Germany; Turner, Sandra Kirtland; 13 Department of Earth and Planetary Sciences University of California – Riverside Riverside CA USA; Wilson, Paul; 14 Ocean and Earth Science University of Southampton National Oceanography Centre Southampton UK; Norris, Richard D.; 15 Center for Marine Biodiversity and Conservation Scripps Institution of Oceanography University of California San Diego La Jolla CA USA; Zachos, James C.; 16 Department of Earth & Planetary Science University of California Santa Cruz CA USA; Bohaty, Steven M.; 14 Ocean and Earth Science University of Southampton National Oceanography Centre Southampton UK; Hull, Pincelli M.; 4 Department of Earth and Planetary Sciences Yale University New Haven CT USA;handle: 11577/3479880
Plain Language Summary: The traditional cyclostratigraphic approach is to align and correlate a geologic depth‐series with an astronomical solution. However, the chaotic nature of the Solar System prevents astronomers from precisely calculating planetary motions beyond 40–50 million years ago. This in turn limits the options for geologists to use the resulting oscillations in Earth's climate system as a metronome for determining geologic time. In this study, we reversed the cyclostratigraphic approach and used the highly rhythmical sedimentary deposits from Newfoundland Ridge (North Atlantic) to back‐calculate planetary motions at ∼41 million years ago. The superior quality of the Newfoundland Ridge geoarchive originates from the combination of relatively high sedimentation rates (∼4 cm/kyr) and the time‐continuous character of our two‐site composite record between 39.5 and 42.8 million years ago. In this work, we had to first overcome considerable challenges in reconstructing the timing of sediment deposition, which we did with highly resolved geochemical measurements from two sites. We then were able to extract information on the Earth's planetary motion and on the Earth‐Moon interactions. These astronomical reconstructions based on geological data can now be used by astronomers to describe the evolution of the solar system further back in time than was previously possible. Cyclostratigraphy and astrochronology are now at the forefront of geologic timekeeping. While this technique heavily relies on the accuracy of astronomical calculations, solar system chaos limits how far back astronomical calculations can be performed with confidence. High‐resolution paleoclimate records with Milankovitch imprints now allow reversing the traditional cyclostratigraphic approach: Middle Eocene drift sediments from Newfoundland Ridge are well‐suited for this purpose, due to high sedimentation rates and distinct lithological cycles. Per contra, the stratigraphies of Integrated Ocean Drilling Program Sites U1408–U1410 are highly complex with several hiatuses. Here, we built a two‐site composite and constructed a conservative age‐depth model to provide a reliable chronology for this rhythmic, highly resolved (4–g3 “grand eccentricity cycle” may have had a 1.2‐Myr period around 41 Ma, contrary to its 2.4‐Myr periodicity today. Our median precession constant estimate (51.28 ± 0.56″/year) confirms earlier indicators of a relatively low rate of tidal dissipation in the Paleogene. Newfoundland Ridge drift sediments thus enable a reliable reconstruction of astronomical components at the limit of validity of current astronomical calculations, extracted from geologic data, providing a new target for the next generation of astronomical calculations. Key Points: A new precession‐based cyclostratigraphy for the middle Eocene intervals of IODP Sites U1408 and U1410. Variability in astronomical fundamental frequencies (g‐terms) on million‐year timescales is larger than previously assumed. Our precession constant estimate for 41 Ma (51.28 ± 0.56″/year) confirms earlier indicators of slower tidal dissipation in the Paleogene. Belgian American Educational Foundation http://dx.doi.org/10.13039/100001491 National Science Foundation http://dx.doi.org/10.13039/100000001 University of California http://dx.doi.org/10.13039/100005595 https://paloz.marum.de/confluence/display/ESPUBLIC/NAFF https://paloz.marum.de/AstroComputation/index.html
Archivio istituziona... arrow_drop_down Paleoceanography and PaleoclimatologyArticle . 2023 . Peer-reviewedLicense: CC BYData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 6visibility views 6 download downloads 1 Powered bymore_vert Archivio istituziona... arrow_drop_down Paleoceanography and PaleoclimatologyArticle . 2023 . Peer-reviewedLicense: CC BYData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2017 Italy, Italy, Denmark, Netherlands, United Kingdom, ItalyPublisher:Copernicus GmbH E. R. Thomas; J. M. van Wessem; J. Roberts; J. Roberts; E. Isaksson; E. Schlosser; E. Schlosser; T. J. Fudge; P. Vallelonga; B. Medley; J. Lenaerts; N. Bertler; N. Bertler; M. R. van den Broeke; D. A. Dixon; M. Frezzotti; B. Stenni; B. Stenni; M. Curran; A. A. Ekaykin; A. A. Ekaykin;handle: 20.500.12079/1482 , 11590/353558 , 1874/357779 , 10278/3694428
Abstract. Here we present Antarctic snow accumulation variability at the regional scale over the past 1000 years. A total of 79 ice core snow accumulation records were gathered and assigned to seven geographical regions, separating the high-accumulation coastal zones below 2000 m of elevation from the dry central Antarctic Plateau. The regional composites of annual snow accumulation were evaluated against modelled surface mass balance (SMB) from RACMO2.3p2 and precipitation from ERA-Interim reanalysis. With the exception of the Weddell Sea coast, the low-elevation composites capture the regional precipitation and SMB variability as defined by the models. The central Antarctic sites lack coherency and either do not represent regional precipitation or indicate the model inability to capture relevant precipitation processes in the cold, dry central plateau. Our results show that SMB for the total Antarctic Ice Sheet (including ice shelves) has increased at a rate of 7 ± 0.13 Gt decade−1 since 1800 AD, representing a net reduction in sea level of ∼ 0.02 mm decade−1 since 1800 and ∼ 0.04 mm decade−1 since 1900 AD. The largest contribution is from the Antarctic Peninsula (∼ 75 %) where the annual average SMB during the most recent decade (2001–2010) is 123 ± 44 Gt yr−1 higher than the annual average during the first decade of the 19th century. Only four ice core records cover the full 1000 years, and they suggest a decrease in snow accumulation during this period. However, our study emphasizes the importance of low-elevation coastal zones, which have been under-represented in previous investigations of temporal snow accumulation.
Archivio istituziona... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2017Climate of the Past (CP); NERC Open Research ArchiveOther literature type . Article . 2017 . 2018 . Peer-reviewedCopenhagen University Research Information SystemArticle . 2017Data sources: Copenhagen University Research Information SystemArchivio della Ricerca - Università degli Studi Roma TreArticle . 2017Data sources: Archivio della Ricerca - Università degli Studi Roma Treadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 108 citations 108 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 7visibility views 7 download downloads 81 Powered bymore_vert Archivio istituziona... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2017Climate of the Past (CP); NERC Open Research ArchiveOther literature type . Article . 2017 . 2018 . Peer-reviewedCopenhagen University Research Information SystemArticle . 2017Data sources: Copenhagen University Research Information SystemArchivio della Ricerca - Università degli Studi Roma TreArticle . 2017Data sources: Archivio della Ricerca - Università degli Studi Roma Treadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2016 United Kingdom, Australia, Netherlands, Netherlands, Belgium, Netherlands, Belgium, GermanyPublisher:Copernicus GmbH Funded by:ARC | Tipping points in Records..., ARC | Reconstructing changes in..., ARC | Understanding the drivers... +1 projectsARC| Tipping points in Records of Extreme Events in Australasia: Using the Past to Understand and Plan for Abrupt Future Climate Change ,ARC| Reconstructing changes in atmospheric circulation over the mid-latitudes of the Southern Hemisphere during the past 3000 years ,ARC| Understanding the drivers and impacts of long-term Antarctic ice sheet change ,ARC| Inter-ocean exchange around Australia and its relation to regional and global climateAuthors: Chris S. M. Turney; Christopher J. Fogwill; Jonathan G. Palmer; Erik van Sebille; +20 AuthorsChris S. M. Turney; Christopher J. Fogwill; Jonathan G. Palmer; Erik van Sebille; Zoë Thomas; Matt S. McGlone; Sarah J. Richardson; Janet M. Wilmshurst; Pavla Fenwick; Violette Zunz; Hugues Goosse; Kerry-Jayne Wilson; Lionel Carter; Mathew Lipson; Richard T. Jones; Melanie A. Harsch; Graeme F. Clark; Ezequiel M. Marzinelli; Tracey L. Rogers; Eleanor Rainsley; Laura M. Ciasto; Stephanie Waterman; Elizabeth R. Thomas; Martin Visbeck;Abstract. Occupying about 14 % of the world's surface, the Southern Ocean plays a fundamental role in ocean and atmosphere circulation, carbon cycling and Antarctic ice-sheet dynamics. Unfortunately, high interannual variability and a dearth of instrumental observations before the 1950s limits our understanding of how marine–atmosphere–ice domains interact on multi-decadal timescales and the impact of anthropogenic forcing. Here we integrate climate-sensitive tree growth with ocean and atmospheric observations on southwest Pacific subantarctic islands that lie at the boundary of polar and subtropical climates (52–54° S). Our annually resolved temperature reconstruction captures regional change since the 1870s and demonstrates a significant increase in variability from the 1940s, a phenomenon predating the observational record. Climate reanalysis and modelling show a parallel change in tropical Pacific sea surface temperatures that generate an atmospheric Rossby wave train which propagates across a large part of the Southern Hemisphere during the austral spring and summer. Our results suggest that modern observed high interannual variability was established across the mid-twentieth century, and that the influence of contemporary equatorial Pacific temperatures may now be a permanent feature across the mid- to high latitudes.
CORE (RIOXX-UK Aggre... arrow_drop_down NERC Open Research ArchiveArticle . 2017 . Peer-reviewedFull-Text: http://nora.nerc.ac.uk/515555/1/Turney.pdfData sources: NERC Open Research ArchiveNARCIS; Utrecht University RepositoryArticle . 2017https://doi.org/10.5194/cp-201...Preprint . 2016 . Peer-reviewedLicense: CC BYData sources: CrossrefVrije Universiteit Brussel Research PortalArticle . 2017Data sources: Vrije Universiteit Brussel Research PortalSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 23 citations 23 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 9visibility views 9 download downloads 74 Powered bymore_vert CORE (RIOXX-UK Aggre... arrow_drop_down NERC Open Research ArchiveArticle . 2017 . Peer-reviewedFull-Text: http://nora.nerc.ac.uk/515555/1/Turney.pdfData sources: NERC Open Research ArchiveNARCIS; Utrecht University RepositoryArticle . 2017https://doi.org/10.5194/cp-201...Preprint . 2016 . Peer-reviewedLicense: CC BYData sources: CrossrefVrije Universiteit Brussel Research PortalArticle . 2017Data sources: Vrije Universiteit Brussel Research PortalSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-2016-114&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 NetherlandsPublisher:Wiley Funded by:NSF | SitS: Decoding microbial ..., NIH | Lake Erie Center for the ..., NSF | CAREER: Geochemical and f... +2 projectsNSF| SitS: Decoding microbial interactions in soil systems using subsurface sensors for volatile organic compounds ,NIH| Lake Erie Center for the Great Lakes and Human Health ,NSF| CAREER: Geochemical and functional controls of methane-mediating microbes in Amazon peatlands ,NSF| LTREB Renewal: Drivers of temperate forest carbon storage from canopy closure through successional time ,NSF| Lake Erie Center for Fresh Waters and Human HealthDwivedi, Dipankar; Santos, A L D; Barnard, M A; Crimmins, T M; Malhotra, A; Rod, K A; Aho, K S; Bell, S M; Bomfim, B; Brearley, F Q; Cadillo-Quiroz, H.; Chen, J.; Chen, T.Y.; Gough, C.M.; Graham, E.B.; Hakkenberg, C.R.; Haygood, L.; Koren, Gerbrand; Lilleskov, E.; Meredith, L.K.; Naeher, S.; Nickerson, Z.L.; Pourret, O.; Song, H.-S.; Stahl, M.; Tas, N.; Vargas, R.; Weintraub-Leff, S.; Global Ecohydrology and Sustainability; Environmental Sciences;handle: 1874/426874
This article is composed of three independent commentaries about the state of ICON principles (Goldman et al. 2021) in the AGU Biogeosciences section and discussion on the opportunities and challenges of adopting them. Each commentary focuses on a different topic: Global collaboration, technology transfer and application (Section 2), Community engagement, citizen science, education, and stakeholder involvement (Section 3), and Field, experimental, remote sensing, and real-time data research and application (Section 4). We discuss needs and strategies for implementing ICON and outline short- and long-term goals. The inclusion of global data and international community engagement are key to tackle grand challenges in biogeosciences. Although recent technological advances and growing open-access information across the world have enabled global collaborations to some extent, several barriers ranging from technical to organizational to cultural have remained in advancing interoperability and tangible scientific progress in biogeosciences. Overcoming these hurdles is necessary to address pressing large-scale research questions and applications in the biogeosciences, where ICON principles are essential. Here, we list several opportunities for ICON, including coordinated experimentation and field observations across global sites, that are ripe for implementation in biogeosciences as a means to scientific advancements and social progress.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/essoar.10508474.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Preprint 2020 Netherlands, SpainPublisher:Copernicus GmbH Hoem, Frida S.; Valero, Luis; Evangelinos, Dimitris; Escutia, Carlota; Duncan, Bella; McKay, Robert M.; Brinkhuis, Henk; Sangiorgi, Francesca; Bijl, Peter K.; Marine palynology and palaeoceanography; Marine Palynology;handle: 10481/69999 , 1874/412742
Antarctic continental ice masses fluctuated considerably during the Oligocene "coolhouse", at elevated atmospheric CO2 concentrations of similar to 600-800 ppm. To assess the role of the ocean in the Oligocene ice sheet variability, reconstruction of past ocean conditions in the proximity of the Antarctic margin is needed. While relatively warm ocean conditions have been reconstructed for the Oligocene offshore of Wilkes Land, the geographical extent of that warmth is unknown. In this study, we reconstruct past surface ocean conditions from glaciomarine sediments recovered from Deep Sea Drilling Project (DSDP) Site 274 offshore of the Ross Sea continental margin. This site, located offshore of Cape Adare is ideally situated to characterise Oligocene regional surface ocean conditions, as it is situated between the colder, higher-latitude Ross Sea continental shelf and the warm-temperate Wilkes Land margin in the Oligocene. We first improve the age model of DSDP Site 274 using integrated bio- and magnetostratigraphy. Subsequently, we analyse organic walled dinoflagellate cyst assemblages and lipid biomarkers (TEX86, TetraEther indeX of 86 carbon atoms) to reconstruct surface palaeoceanographic conditions during the Oligocene (33.7-24.4 Ma). Both TEX86 based sea surface temperature (SST) and microplankton results show temperate (10-17 degrees C +/- 5.2 degrees C) surface ocean conditions at Site 274 throughout the Oligocene. Oceanographic conditions between the offshore Wilkes Land margin and Cape Adare became increasingly similar towards the late Oligocene (26.5-24.4 Ma); this is inferred to be the consequence of the widening of the Tasmanian Gateway, which resulted in more interconnected ocean basins and frontal systems. Maintaining marine terminations of terrestrial ice sheets in a proto-Ross Sea with offshore SSTs that are as warm as those suggested by our data requires a strong ice flux fed by intensive precipitation in the Antarctic hinterland during colder orbital states but with extensive surface melt of terrestrial ice during warmer orbital states. This research has been supported by the NWO Polar Programme (grant no. ALW.2016.001.); the Spanish Ministry of Economy, Industry and Competitiveness (grant no. CTM2017-89711-C2-1-P/CTM2017-89711-C2-2-P), co-funded by the European Union through FEDER funds; and the Alexander S. Onassis Public Benefit Foundation PhD research grant (grant no. F ZL 016-1/2015-2016). Spanish Ministry of Economy, Industry and Competitiveness CTM2017-89711-C2-1-P/CTM2017-89711-C2-2-P Alexander S. Onassis Public Benefit Foundation PhD research grant F ZL 016-1/2015-2016 European Union through FEDER funds NWO Polar Programme ALW.2016.001
NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2021Copernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationshttps://doi.org/10.5194/cp-202...Preprint . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefRecolector de Ciencia Abierta, RECOLECTA; Repositorio Institucional Universidad de GranadaOther literature type . Article . 2021License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 9 citations 9 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2021Copernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationshttps://doi.org/10.5194/cp-202...Preprint . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefRecolector de Ciencia Abierta, RECOLECTA; Repositorio Institucional Universidad de GranadaOther literature type . Article . 2021License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2014 Netherlands, GermanyPublisher:Copernicus GmbH Funded by:NWO | The Dawn of a Greenhouse ..., EC | DINOPRONWO| The Dawn of a Greenhouse Earth: climate and carbon cycle dynamics of the Paleocene ,EC| DINOPROContreras, L.; Pross, J.; Bijl, P.K.; O'Hara, R.B.; Raine, J.I.; Sluijs, A.; Brinkhuis, H.; NWO-NNPP: Reconstructing the evolution and dynamics of the Antarctic cryosphere from Ocean Drilling; a dinoflagellate perspective; NWO-VENI: The Dawn of Greenhouse Earth: climate and carbon cycle dynamics of the Palaeocene; Marine palynology and palaeoceanography;handle: 1874/307322
Reconstructing the early Palaeogene climate dynamics of terrestrial settings in the high southern latitudes is important to assess the role of high-latitude physical and biogeochemical processes in the global climate system. However, whereas a number of high-quality Palaeogene climate records has become available for the marine realm of the high southern latitudes over the recent past, the long-term evolution of coeval terrestrial climates and ecosystems is yet poorly known. We here explore the climate and vegetation dynamics on Tasmania from the middle Palaeocene to the early Eocene (60.7–54.2 Ma) based on a sporomorph record from Ocean Drilling Program (ODP) Site 1172 on the East Tasman Plateau. Our results show that three distinctly different vegetation types thrived on Tasmania under a high-precipitation regime during the middle Palaeocene to early Eocene, with each type representing different temperature conditions: (i) warm-temperate forests dominated by gymnosperms that were dominant during the middle and late Palaeocene (excluding the middle/late Palaeocene transition); (ii) cool-temperate forests dominated by southern beech (Nothofagus) and araucarians that transiently prevailed across the middle/late Palaeocene transition interval (~ 59.5 to ~ 59.0 Ma); and (iii) paratropical forests rich in ferns that were established during and in the wake of the Palaeocene–Eocene Thermal Maximum (PETM). The transient establishment of cool-temperate forests lacking any frost-sensitive elements (i.e. palms and cycads) across the middle/late Palaeocene transition interval indicates markedly cooler conditions, with the occurrence of frosts in winter, on Tasmania during that time. The integration of our sporomorph data with previously published TEX86-based sea-surface temperatures from ODP Site 1172 documents that the vegetation dynamics on Tasmania were closely linked with the temperature evolution in the Tasman sector of the Southwest Pacific region. Moreover, the comparison of our season-specific climate estimates for the sporomorph assemblages from ODP Site 1172 with the TEX86L- and TEX86H-based temperature data suggests a warm bias of both calibrations for the early Palaeogene of the high southern latitudes.
NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2014Hochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am MainClimate of the Past (CP); Climate of the PastArticle . Preprint . 2014 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am Mainadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 31 citations 31 popularity Top 10% influence Average impulse Average Powered by BIP!more_vert NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2014Hochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am MainClimate of the Past (CP); Climate of the PastArticle . Preprint . 2014 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2014Data sources: Hochschulschriftenserver - Universität Frankfurt am Mainadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2018 Netherlands, SpainPublisher:Copernicus GmbH Funded by:NWO | Reconstructing the the ev..., NWO | The Dawn of a Greenhouse ...NWO| Reconstructing the the evolution and dynamics of the Antarctic cryosphere from Ocean Drilling; a dinoflagellate perspective ,NWO| The Dawn of a Greenhouse Earth: climate and carbon cycle dynamics of the PaleoceneSalabarnada, Ariadna; Escutia, Carlota; Röhl, Ursula; Nelson, C. Hans; McKay, Robert; Jiménez-Espejo, Francisco J.; Bijl, Peter K.; Hartman, Julian D.; Strother, Stephanie L.; Salzmann, Ulrich; Evangelinos, Dimitris; López-Quirós, Adrián; Flores, José Abel; Sangiorgi, Francesca; Ikehara, Minoru; Brinkhuis, Henk; Marine palynology and palaeoceanography; Marine Palynology;handle: 10261/214722 , 1874/366652
Antarctic ice sheet and Southern Ocean paleoceanographic configurations during the late Oligocene are not well resolved. They are however important to understand the influence of high-latitude Southern Hemisphere feedbacks on global climate under CO scenarios (between 400 and 750 ppm) projected by the IPCC for this century, assuming unabated CO emissions. Sediments recovered by the Integrated Ocean Drilling Program (IODP) at Site U1356, offshore of the Wilkes Land margin in East Antarctica, provide an opportunity to study ice sheet and paleoceanographic configurations during the late Oligocene (26-25 Ma). Our study, based on a combination of sediment facies analysis, magnetic susceptibility, density, and X-ray fluorescence geochemical data, shows that glacial and interglacial sediments are continuously reworked by bottom currents, with maximum velocities occurring during the interglacial periods. Glacial sediments record poorly ventilated, low-oxygenation bottom water conditions, interpreted as resulting from a northward shift of westerly winds and surface oceanic fronts. Interglacial sediments record more oxygenated and ventilated bottom water conditions and strong current velocities, which suggests enhanced mixing of the water masses as a result of a southward shift of the polar front. Intervals with preserved carbonated nannofossils within some of the interglacial facies are interpreted as forming under warmer paleoclimatic conditions when less corrosive warmer northern component water (e.g., North Atlantic sourced deep water) had a greater influence on the site. Spectral analysis on the late Oligocene sediment interval shows that the glacial-interglacial cyclicity and related displacements of the Southern Ocean frontal systems between 26 and 25Ma were forced mainly by obliquity. The paucity of iceberg-rafted debris (IRD) throughout the studied interval contrasts with earlier Oligocene and post-Miocene Climate Optimum sections from Site U1356 and with late Oligocene strata from the Ross Sea, which contain IRD and evidence for coastal glaciers and sea ice. These observations, supported by elevated sea surface paleotemperatures, the absence of sea ice, and reconstructions of fossil pollen between 26 and 25 Ma at Site U1356, suggest that open-ocean water conditions prevailed. Combined, this evidence suggests that glaciers or ice caps likely occupied the topographic highs and lowlands of the now marine Wilkes Subglacial Basin (WSB). Unlike today, the continental shelf was not overdeepened and thus ice sheets in the WSB were likely land-based, and marine-based ice sheet expansion was likely limited to coastal regions. This research used samples and data provided by the Integrated Ocean Drilling Program, now the International Ocean Discovery Program (IODP). We thank thestaff onboard IODP Exp. 318 and at the Gulf Coast, the Bremen, and the Kochi IODP core repositories for assistance in core handling and shipping. We thank Vera Lukies (MARUM) for technical support with XRF core scanning and Shizu Yanagimoto (KOCHI) fortechnical supportwith CT scans.We alsothank theconstructive comments of an anonymous reviewer and Steven Pekar that have helped to improve this paper. Funding for this research is provided by the Spanish Ministerio de Economía y Competitividad (grants CTM 2011-24079 and CTM2014-60451-C2-1-P), co-funded by the European Union through FEDER funds. Ulrich Salzmann thanks the Deutsche Forschungsgemeinschaft (DFG) (RO 1113/6). Peter K. Bijl, Francesca Sangiorgi, and Julian D. Hartman acknowledge funding through the NWO polar programme grant no 866.10.110. Peter K. Bijl acknowledges funding through NWO-VENI grant no 863.13.002. Ulrich Salzmann acknowledges funding received from the Natural Environment Research Council (NERC grant NE/H000984/1).
CORE (RIOXX-UK Aggre... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2018add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 39 citations 39 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 22visibility views 22 download downloads 178 Powered bymore_vert CORE (RIOXX-UK Aggre... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2018add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 Italy, United Kingdom, France, Germany, NetherlandsPublisher:Springer Science and Business Media LLC Funded by:UKRI | FEC recovery for co-chief..., UKRI | Testing the amplitude and..., UKRI | Evolution of Carbon Cycle... +1 projectsUKRI| FEC recovery for co-chief scientist duties of Dr Heiko Pälike for IODP Expedition 320 ,UKRI| Testing the amplitude and rapidity of carbonate saturation change and global climate during the high pCO2 Oligocene 'cold house' ,UKRI| Evolution of Carbon Cycle Dynamics (eCCD) ,UKRI| Testing and modelling a transient episode of ocean acidification prior to the Eocene-Oligocene onset of the Cenozoic 'ice house'Heiko Pälike; Mitchell W Lyle; Hiroshi Nishi; Isabella Raffi; Andy Ridgwell; Kusali Gamage; Adam Klaus; Gary D Acton; L. Anderson; Jan Backman; Jack G. Baldauf; Catherine Beltran; Steven M Bohaty; Paul R. Bown; W.H. Busch; James E.T. Channell; Cecily O J Chun; Margaret Lois Delaney; Pawan Dewangan; Tom Dunkley Jones; Kirsty M. Edgar; Helen F Evans; Peter Fitch; Gavin L. Foster; Nikolaus Gussone; Hitoshi Hasegawa; Ed C Hathorne; Hiroki Hayashi; Jens O. Herrle; Ann Holbourn; Steve Hovan; Kiseong Hyeong; Koichi Iijima; Takashi Ito; Shin-Ichi Kamikuri; Katsunori Kimoto; Junichiro Kuroda; Lizette Leon-Rodriguez; Alberto Malinverno; Theodore C. Moore; Brandon Murphy; Daniel P Murphy; Hideto Nakamura; Kaoru Ogane; Christian Ohneiser; Carl Richter; Rebecca S. Robinson; Eelco J. Rohling; Oscar E Romero; Ken Sawada; Howie D. Scher; Leah Schneider; Appy Sluijs; Hiroyuki Takata; Jun Tian; Akira Tsujimoto; Bridget S. Wade; Thomas Westerhold; Roy H Wilkens; Trevor Williams; Paul A. Wilson; Yuhji Yamamoto; Shinya Yamamoto; Toshitsugu Yamazaki; Richard E. Zeebe;doi: 10.1038/nature11360
pmid: 22932380
Atmospheric carbon dioxide concentrations and climate are regulated on geological timescales by the balance between carbon input from volcanic and metamorphic outgassing and its removal by weathering feedbacks; these feedbacks involve the erosion of silicate rocks and organic-carbon-bearing rocks. The integrated effect of these processes is reflected in the calcium carbonate compensation depth, which is the oceanic depth at which calcium carbonate is dissolved. Here we present a carbonate accumulation record that covers the past 53 million years from a depth transect in the equatorial Pacific Ocean. The carbonate compensation depth tracks long-term ocean cooling, deepening from 3.0-3.5 kilometres during the early Cenozoic (approximately 55 million years ago) to 4.6 kilometres at present, consistent with an overall Cenozoic increase in weathering. We find large superimposed fluctuations in carbonate compensation depth during the middle and late Eocene. Using Earth system models, we identify changes in weathering and the mode of organic-carbon delivery as two key processes to explain these large-scale Eocene fluctuations of the carbonate compensation depth. International audience
OceanRep arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2012NARCIS; Utrecht University RepositoryArticle . 2012add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 298 citations 298 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 2visibility views 2 Powered bymore_vert OceanRep arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2012NARCIS; Utrecht University RepositoryArticle . 2012add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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