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18 Research products

  • Digital Humanities and Cultural Heritage
  • 2023-2023
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Camuera, Jon; Jiménez-Espejo, Francisco Jose; Soto-Chica, José; Jiménez-Moreno, Gonzalo; +4 Authors

    The data show the normalized stacked records of Artemisia and xerophytes from the Iberian Peninsula and Morocco for the last 5000 cal yrs BP. The stack of Artemisia is based on the 100 fossil pollen records, whereas the stack of Xerophytes is based on 107 records. Both Artemisia and Xerophyte stacks also include the 15-point and 45-point moving averages.

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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Mas, Erwanne; Przewozny-Desriaux, Anne;
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao CoCoONarrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    CoCoON
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao CoCoONarrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      CoCoON
      Collection . 2023
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Etchart, Joana; Tobia, Simona; Milne, Andrew;

    Le projet vise à explorer l’implantation anglophone actuelle dans la ville de Pau et dans les Pyrénées-Atlantiques. Il s’intéresse aux résidents issus des pays anglophones du Royaume-Uni, de l’Irlande, des Etats-Unis et du Canada et à la réalité contemporaine de cette présence méconnue : qui sont ces émigrés ? Quel est leur « parcours migratoire » ? Grâce à la méthode scientifique de l’histoire orale et à l’organisation de 40 entretiens avec des témoins anglophones, le projet s’intéresse aux éléments constituant l’expérience de la migration, l'intégration et la construction de l'identité pour ce groupe méconnu. Les entretiens sont documentés sur Cocoon et préservés dans les archives de l’agglomération. The project aims to explore the current Anglophone presence in the city of Pau and the Pyrénées-Atlantiques region. It focuses on residents from the English-speaking countries of the UK, Ireland, the USA and Canada, and the contemporary reality of this little-known presence: who are these emigrants? What is their "migratory journey"? Thanks to the scientific method of Oral History and the organization of 40 interviews with English-speaking narrators, the project focuses on the elements constituting the migration experience, integration and identity construction for this little-known group. The interviews are documented on Cocoon and preserved in the local archives.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao CoCoONarrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    CoCoON
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao CoCoONarrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      CoCoON
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  • Authors: Bittmann, Felix;

    During restoration works in the castle of Jever, Lower Saxony, a hidden niche in the former kitchen wall was found filled-up with wate material: botanical remains, bones, insects, molluscs, bricks, mortar. The analysis revealed a large number of plant species both local and imported (Olea). In addition, bones of mammaly, birds, fishes and amphibia were identified.

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    Authors: Vorrath, Maria-Elena; Müller, Juliane; Cárdenas, Paola; Mieruch, Sebastian; +11 Authors

    The data set of the marine sediment core PS97/72-1 from the Bransfield Strait, Antarctic Peninsula, contains data from analyses of a 1012 cm core covering the age from recent to 13.8 ka BP. The piston core was retrieved 2016 during R/V Polarstern cruise PS97. The purpose of this data was a study for the reconstruction of Deglacial and Holocene sea ice and climate dynamics in the Bransfield Strait, Northern Antarctic Peninsula, which was published in Climate of the Past. Dataset 1 contains details of the radiocarbon ages. Dataset 2 are the geochemical bulk parameters including sedimentation rate, total organic carbon, biogenic opal, C/N ration, d13C of organic carbon, branched and isoprenoid tetraether index BIT and ice rafted debris. Dataset 3 is information on biomarkers with highly branched isoprenoids diene and triene (IPSO25), the phytoplankton biomarker IPSO25 index, d13C of IPSO25, branched and isoprenoid tetraether index BIT, sub-surface ocean temperature (based on branched GDGTs), diatom derived sea ice probability and diatom derived summer sea surface temperature. Dataset 4 contains all diatom counts including groupings of diatoms indication seasonal sea ice and open ocean cold and warm species.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Weber, Michael E;

    Here, sediment-physical properties of the Bengal Fan IODP Expedition 354 are tabulated in support of the paper by Kawsar et al. (2023). This comprises color reflectance data L*, wet-bulk density, magnetic susceptibility, and natural gamma radiation for Supplementary Figure 3. For methods see (Weber et al., 1997). For the Age depth model, low-resolution age control for Site U1451A is tabulated for biostratigraphy with 15 first occurrences (FO) and last occurrences (LO) of species datums, their depth distribution and depth uncertainty according to the age scale of Gradstein (2012). Low-resolution age control provided by 12 magnetostratigraphic reversals with depth. All data from species datums and magnetostratigraphic reversals are from (France-Lanord et al. (2016). Additional biostratigraphic data are from Blum et al. (2018) with depth, age and age error. The resulting high-resolution depth-age model based is given in dataset doi:10.1594/PANGAEA.964099. It relies on tuning color reflectance L* to insolation at 20°N for the month of June using the orbital solutions of Laskar et al. (2004). Note that the top 32 tuning points (0-83.44 m; 0-1.208 Ma) are from Weber and Reilly (2018) and the remaining 138 tuning points below (89.46-367.5 m; 1.339-8.485 Ma) are from this study. This supplementary data corresponds to Fig. 3 of the paper.

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  • Authors: Frederiks, Pière Leon; Karle, Martina; Wolters, Steffen; Siegmüller, Annette; +2 Authors

    The data has been taken in the Ahlen-Falkenberger bog in the district of Cuxhaven between 2019 and 2022 as part of the project Preserved in the bog. The aim of the prospection was to map the bog base and to check the surface under the bog for anthropogenic traces. The drilling data form part of the data on which the reconstruction of the prehistoric landscape is based.

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    Authors: Wolff, Eric William; Mulvaney, Robert; Grieman, Mackenzie M; Hoffmann, Helene; +1 Authors

    We present an age model for the 651 m deep Skytrain Ice Rise ice core (79°44.5'S, 78°32.7'W). The top 2000 years have previously been dated using age markers interpolated through annual layer counting. Below this, we align the Skytrain core to the AICC2012 age model using tie points in the ice and air phase, and apply the Paleochrono program to obtain the best fit to the tie points and glaciological constraints. In the gas phase, ties are made using methane and, in critical sections, δ18Oair; in the ice phase ties are through 10Be across the Laschamps Event, and through ice chemistry related to long-range dust transport and deposition. This strategy provides a good outcome to about 108 ka (~605 m). Beyond that there are signs of flow disturbance, with a section of ice probably repeated. Nonetheless values of CH4 and δ18Oair confirm that part of the last interglacial (LIG), from about 117-126 ka (617-628 m), is present and in chronological order. Below this there are clear signs of stratigraphic disturbance, with rapid oscillation of values in both the ice and gas phase at the base of the LIG section. Based on methane values, the warmest part of the LIG and the coldest part of the penultimate glacial are missing from our record. Ice below 631 m appears to be of age >150 ka.

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    Authors: Raffel, Bonnie; Touzeau, Alexandra; Sodemann, Harald; Lange, Benjamin Allen; +3 Authors

    The physical properties of sea ice, including salinity, sea ice temperature, and sea ice texture as well as isotopic composition (oxygen and hydrogen) were analyzed from samples collected on the CAATEX 2019 expedition to the central Arctic Ocean (between North Pole and Svalbard) in late summer 2019. In addition, isotope samples were collected from precipitation, melt ponds, and under-ice seawater. Data was collected to understand the formation mechanisms of sea ice in the area. Ice cores were collected with an ice corer, and measurements (temperature) were directly carried out from ice cores after retrieval. From an additional ice core, samples (salinity and isotopes) were collected and melted onboard. Salinity of samples was measured onboard using a conductivity probe, while samples for isotopic composition were placed in sample bottles and measured at the FARLAB (University of Bergen) after the expedition . A complete ice core was brought back for texture analysis of the sea ice and processed at the freezer lab at the Norwegian Polar Institute. Texture was examined by first slicing ice samples very thin by use of a microtome. These thin ice slices were observed in polarized light that reveals the crystal structure of the ice. This data includes the photographs taken of the ice cores in natural light and in polarized light.

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    Authors: Hodell, David A; Crowhurst, Simon J; Lourens, Lucas Joost; Margari, Vasiliki; +7 Authors

    Data consist of a continuous millennially-resolved record of oxgyen and carbon stable isotope composition of planktonic and benthic foraminifera at IODP Site U1385 and piston core MD01-2444 from the southwestern Iberian margin for the last 1.5 million years. Elemental ratios (Ca/Ti and Zr/Sr) are also reported from the composite section of Site U1385 and core MD01-2444. Oxygen and carbon isotope measurements of planktic and benthic foraminifera were made at an average temporal resolution of ~200 years for the last 1.45 million years. For planktic foraminifera, the surface-dwelling species Globigerina bulloides from the 250 - 350 um size fraction was used. Benthic foraminifer data consists mostly of Cibicidoides wuellerstorfi and occasionally other species of Cibicidoides were measured from the >212 um size fraction. In samples where specimens of Cibicidoides spp. were absent, we used d18O of Uvigerina peregrina or Globobulimina affinis. All δ18O values for each species were corrected to Uvigerina using the offsets suggested by Shackleton et al. (2000) -- i.e., +0.64 for Cibicidoides and -0.3 for G. affinis. Stable isotope measurements were made in the Godwin Laboratory for Palaeoclimate research at the University of Cambridge. Foraminifer tests were crushed and soaked in a solution of 1% hydrogen per-oxide for 30 min in individual vials. Acetone was added and the samples placed in an ultra-sonic bath for 10 s, after which the liquid was carefully decanted to remove any contaminants. The samples were dried in an oven at 50 °C overnight. Isotopic analyses of the samples were per-formed using a VG SIRA mass spectrometer with a Multicarb system for samples with a mass exceeding 80 μg. Analytical precision is estimated to be ±0.08‰ for both δ18O and δ13C. For smaller samples (<80 μg), measurements were performed on a Thermo Finnigan MAT253 mass spectrometer fitted with a Kiel device. Analytical precision is estimated to be ±0.08‰ for δ18O and ±0.06‰ for δ13C, respectively. All results are reported relative to VPDB. Elemental ratios (Ca/Ti and Zr/Sr) were obtained using an Avaatech X-ray fluorescence (XRF) core scanner at 1-cm spatial resolution. Cores from Holes U1385A and U1385B were measured at the Royal Netherlands Institute for Sea Research (NIOZ) and Holes U1385D and U1385E and MD01-2444 were measured at the Godwin Laboratory for Palaeoclimate Reseach at the University of Cambridge. The core surface was carefully scraped cleaned and covered with a 4-μm thin SPEXCertiPrep Ultralene foil to avoid contamination and reduce desiccation. All XRF scanners irradiated a surface of 10-mm high by 12-mm wide every 1 cm with identical instrument settings used at both NIOZ and Cambridge. Cores were scanned at 3 voltages: 10kv (750 μamps, 10 sec count time with no filter); 30 kv (500 μamps, 10 sec count time with Pd thin filter); and 50 kv (1000 μramps, 60 sec count time with Cu vilter). Element intensities were obtained by post-processing of the XRF spectra using the Canberra WinAxil software with standard soft-ware settings and spectrum-fit models. The purpose of the analyses were to produce records of millennial-scale climate variability (MCV) during the last 1.45 million years. Questions to be addressed with the data included: How common was MCV during older glacial periods of the Pleistocene? Did the nature (intensity, duration, pacing) of MCV change with orbital configuration or climate background state (ice volume, sea-level, ice sheet height)? What is the relationship between MCV and longer-term, orbitally-driven glacial-interglacial cycles – how do they interact? How did MCV change across the Middle Pleistocene Transition (MPT) when ice sheets grew larger in size and the amplitude of glacial-interglacial cycles increased? Was the thermal bipolar seesaw mechanism active during older glacial periods of the Pleistocene? What role did millennial variability play in atmospheric CO2 variations or vice-versa?

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Camuera, Jon; Jiménez-Espejo, Francisco Jose; Soto-Chica, José; Jiménez-Moreno, Gonzalo; +4 Authors

    The data show the normalized stacked records of Artemisia and xerophytes from the Iberian Peninsula and Morocco for the last 5000 cal yrs BP. The stack of Artemisia is based on the 100 fossil pollen records, whereas the stack of Xerophytes is based on 107 records. Both Artemisia and Xerophyte stacks also include the 15-point and 45-point moving averages.

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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Mas, Erwanne; Przewozny-Desriaux, Anne;
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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    CoCoON
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      CoCoON
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Etchart, Joana; Tobia, Simona; Milne, Andrew;

    Le projet vise à explorer l’implantation anglophone actuelle dans la ville de Pau et dans les Pyrénées-Atlantiques. Il s’intéresse aux résidents issus des pays anglophones du Royaume-Uni, de l’Irlande, des Etats-Unis et du Canada et à la réalité contemporaine de cette présence méconnue : qui sont ces émigrés ? Quel est leur « parcours migratoire » ? Grâce à la méthode scientifique de l’histoire orale et à l’organisation de 40 entretiens avec des témoins anglophones, le projet s’intéresse aux éléments constituant l’expérience de la migration, l'intégration et la construction de l'identité pour ce groupe méconnu. Les entretiens sont documentés sur Cocoon et préservés dans les archives de l’agglomération. The project aims to explore the current Anglophone presence in the city of Pau and the Pyrénées-Atlantiques region. It focuses on residents from the English-speaking countries of the UK, Ireland, the USA and Canada, and the contemporary reality of this little-known presence: who are these emigrants? What is their "migratory journey"? Thanks to the scientific method of Oral History and the organization of 40 interviews with English-speaking narrators, the project focuses on the elements constituting the migration experience, integration and identity construction for this little-known group. The interviews are documented on Cocoon and preserved in the local archives.

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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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  • Authors: Bittmann, Felix;

    During restoration works in the castle of Jever, Lower Saxony, a hidden niche in the former kitchen wall was found filled-up with wate material: botanical remains, bones, insects, molluscs, bricks, mortar. The analysis revealed a large number of plant species both local and imported (Olea). In addition, bones of mammaly, birds, fishes and amphibia were identified.

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    Authors: Vorrath, Maria-Elena; Müller, Juliane; Cárdenas, Paola; Mieruch, Sebastian; +11 Authors

    The data set of the marine sediment core PS97/72-1 from the Bransfield Strait, Antarctic Peninsula, contains data from analyses of a 1012 cm core covering the age from recent to 13.8 ka BP. The piston core was retrieved 2016 during R/V Polarstern cruise PS97. The purpose of this data was a study for the reconstruction of Deglacial and Holocene sea ice and climate dynamics in the Bransfield Strait, Northern Antarctic Peninsula, which was published in Climate of the Past. Dataset 1 contains details of the radiocarbon ages. Dataset 2 are the geochemical bulk parameters including sedimentation rate, total organic carbon, biogenic opal, C/N ration, d13C of organic carbon, branched and isoprenoid tetraether index BIT and ice rafted debris. Dataset 3 is information on biomarkers with highly branched isoprenoids diene and triene (IPSO25), the phytoplankton biomarker IPSO25 index, d13C of IPSO25, branched and isoprenoid tetraether index BIT, sub-surface ocean temperature (based on branched GDGTs), diatom derived sea ice probability and diatom derived summer sea surface temperature. Dataset 4 contains all diatom counts including groupings of diatoms indication seasonal sea ice and open ocean cold and warm species.

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    Authors: Weber, Michael E;

    Here, sediment-physical properties of the Bengal Fan IODP Expedition 354 are tabulated in support of the paper by Kawsar et al. (2023). This comprises color reflectance data L*, wet-bulk density, magnetic susceptibility, and natural gamma radiation for Supplementary Figure 3. For methods see (Weber et al., 1997). For the Age depth model, low-resolution age control for Site U1451A is tabulated for biostratigraphy with 15 first occurrences (FO) and last occurrences (LO) of species datums, their depth distribution and depth uncertainty according to the age scale of Gradstein (2012). Low-resolution age control provided by 12 magnetostratigraphic reversals with depth. All data from species datums and magnetostratigraphic reversals are from (France-Lanord et al. (2016). Additional biostratigraphic data are from Blum et al. (2018) with depth, age and age error. The resulting high-resolution depth-age model based is given in dataset doi:10.1594/PANGAEA.964099. It relies on tuning color reflectance L* to insolation at 20°N for the month of June using the orbital solutions of Laskar et al. (2004). Note that the top 32 tuning points (0-83.44 m; 0-1.208 Ma) are from Weber and Reilly (2018) and the remaining 138 tuning points below (89.46-367.5 m; 1.339-8.485 Ma) are from this study. This supplementary data corresponds to Fig. 3 of the paper.

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  • Authors: Frederiks, Pière Leon; Karle, Martina; Wolters, Steffen; Siegmüller, Annette; +2 Authors

    The data has been taken in the Ahlen-Falkenberger bog in the district of Cuxhaven between 2019 and 2022 as part of the project Preserved in the bog. The aim of the prospection was to map the bog base and to check the surface under the bog for anthropogenic traces. The drilling data form part of the data on which the reconstruction of the prehistoric landscape is based.

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    Authors: Wolff, Eric William; Mulvaney, Robert; Grieman, Mackenzie M; Hoffmann, Helene; +1 Authors

    We present an age model for the 651 m deep Skytrain Ice Rise ice core (79°44.5'S, 78°32.7'W). The top 2000 years have previously been dated using age markers interpolated through annual layer counting. Below this, we align the Skytrain core to the AICC2012 age model using tie points in the ice and air phase, and apply the Paleochrono program to obtain the best fit to the tie points and glaciological constraints. In the gas phase, ties are made using methane and, in critical sections, δ18Oair; in the ice phase ties are through 10Be across the Laschamps Event, and through ice chemistry related to long-range dust transport and deposition. This strategy provides a good outcome to about 108 ka (~605 m). Beyond that there are signs of flow disturbance, with a section of ice probably repeated. Nonetheless values of CH4 and δ18Oair confirm that part of the last interglacial (LIG), from about 117-126 ka (617-628 m), is present and in chronological order. Below this there are clear signs of stratigraphic disturbance, with rapid oscillation of values in both the ice and gas phase at the base of the LIG section. Based on methane values, the warmest part of the LIG and the coldest part of the penultimate glacial are missing from our record. Ice below 631 m appears to be of age >150 ka.

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    Authors: Raffel, Bonnie; Touzeau, Alexandra; Sodemann, Harald; Lange, Benjamin Allen; +3 Authors

    The physical properties of sea ice, including salinity, sea ice temperature, and sea ice texture as well as isotopic composition (oxygen and hydrogen) were analyzed from samples collected on the CAATEX 2019 expedition to the central Arctic Ocean (between North Pole and Svalbard) in late summer 2019. In addition, isotope samples were collected from precipitation, melt ponds, and under-ice seawater. Data was collected to understand the formation mechanisms of sea ice in the area. Ice cores were collected with an ice corer, and measurements (temperature) were directly carried out from ice cores after retrieval. From an additional ice core, samples (salinity and isotopes) were collected and melted onboard. Salinity of samples was measured onboard using a conductivity probe, while samples for isotopic composition were placed in sample bottles and measured at the FARLAB (University of Bergen) after the expedition . A complete ice core was brought back for texture analysis of the sea ice and processed at the freezer lab at the Norwegian Polar Institute. Texture was examined by first slicing ice samples very thin by use of a microtome. These thin ice slices were observed in polarized light that reveals the crystal structure of the ice. This data includes the photographs taken of the ice cores in natural light and in polarized light.

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    Authors: Hodell, David A; Crowhurst, Simon J; Lourens, Lucas Joost; Margari, Vasiliki; +7 Authors

    Data consist of a continuous millennially-resolved record of oxgyen and carbon stable isotope composition of planktonic and benthic foraminifera at IODP Site U1385 and piston core MD01-2444 from the southwestern Iberian margin for the last 1.5 million years. Elemental ratios (Ca/Ti and Zr/Sr) are also reported from the composite section of Site U1385 and core MD01-2444. Oxygen and carbon isotope measurements of planktic and benthic foraminifera were made at an average temporal resolution of ~200 years for the last 1.45 million years. For planktic foraminifera, the surface-dwelling species Globigerina bulloides from the 250 - 350 um size fraction was used. Benthic foraminifer data consists mostly of Cibicidoides wuellerstorfi and occasionally other species of Cibicidoides were measured from the >212 um size fraction. In samples where specimens of Cibicidoides spp. were absent, we used d18O of Uvigerina peregrina or Globobulimina affinis. All δ18O values for each species were corrected to Uvigerina using the offsets suggested by Shackleton et al. (2000) -- i.e., +0.64 for Cibicidoides and -0.3 for G. affinis. Stable isotope measurements were made in the Godwin Laboratory for Palaeoclimate research at the University of Cambridge. Foraminifer tests were crushed and soaked in a solution of 1% hydrogen per-oxide for 30 min in individual vials. Acetone was added and the samples placed in an ultra-sonic bath for 10 s, after which the liquid was carefully decanted to remove any contaminants. The samples were dried in an oven at 50 °C overnight. Isotopic analyses of the samples were per-formed using a VG SIRA mass spectrometer with a Multicarb system for samples with a mass exceeding 80 μg. Analytical precision is estimated to be ±0.08‰ for both δ18O and δ13C. For smaller samples (<80 μg), measurements were performed on a Thermo Finnigan MAT253 mass spectrometer fitted with a Kiel device. Analytical precision is estimated to be ±0.08‰ for δ18O and ±0.06‰ for δ13C, respectively. All results are reported relative to VPDB. Elemental ratios (Ca/Ti and Zr/Sr) were obtained using an Avaatech X-ray fluorescence (XRF) core scanner at 1-cm spatial resolution. Cores from Holes U1385A and U1385B were measured at the Royal Netherlands Institute for Sea Research (NIOZ) and Holes U1385D and U1385E and MD01-2444 were measured at the Godwin Laboratory for Palaeoclimate Reseach at the University of Cambridge. The core surface was carefully scraped cleaned and covered with a 4-μm thin SPEXCertiPrep Ultralene foil to avoid contamination and reduce desiccation. All XRF scanners irradiated a surface of 10-mm high by 12-mm wide every 1 cm with identical instrument settings used at both NIOZ and Cambridge. Cores were scanned at 3 voltages: 10kv (750 μamps, 10 sec count time with no filter); 30 kv (500 μamps, 10 sec count time with Pd thin filter); and 50 kv (1000 μramps, 60 sec count time with Cu vilter). Element intensities were obtained by post-processing of the XRF spectra using the Canberra WinAxil software with standard soft-ware settings and spectrum-fit models. The purpose of the analyses were to produce records of millennial-scale climate variability (MCV) during the last 1.45 million years. Questions to be addressed with the data included: How common was MCV during older glacial periods of the Pleistocene? Did the nature (intensity, duration, pacing) of MCV change with orbital configuration or climate background state (ice volume, sea-level, ice sheet height)? What is the relationship between MCV and longer-term, orbitally-driven glacial-interglacial cycles – how do they interact? How did MCV change across the Middle Pleistocene Transition (MPT) when ice sheets grew larger in size and the amplitude of glacial-interglacial cycles increased? Was the thermal bipolar seesaw mechanism active during older glacial periods of the Pleistocene? What role did millennial variability play in atmospheric CO2 variations or vice-versa?

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