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description Publicationkeyboard_double_arrow_right Article , Other literature type 2021 Norway, Netherlands, France, United Kingdom, France, Norway EnglishPublisher:Copernicus Publications Funded by:NSERC, NSF | Collaborative Research: A..., NSF | The Management and Operat... +1 projectsNSERC ,NSF| Collaborative Research: Arctic Temperature Amplification during the Middle Pliocene (ArcAMP): Assessing the interaction among feedback mechanisms ,NSF| The Management and Operation of the National Center for Atmoshperic Research (NCAR) ,NSF| Collaborative Research: Paleoclimate perspective on the response of Southwest North American rainfall to elevated greenhouse gasesBerntell, E; Zhang, Q; Li, Q; Haywood, AM; Tindall, JC; Hunter, SJ; Zhang, Z; Li, X; Guo, C; Nisancioglu, KH; Stepanek, C; Lohmann, G; Sohl, LE; Chandler, MA; Tan, N; Contoux, C; Ramstein, G; Baatsen, MLJ; von der Heydt, AS; Chandan, D; Peltier, WR; Abe-Ouchi, A; Chan, W-L; Kamae, Y; Williams, CJR; Lunt, DJ; Feng, R; Otto-Bliesner, BL; Brady, EC;Abstract. The mid-Pliocene warm period (mPWP; ∼3.2 million years ago) is seen as the most recent time period characterized by a warm climate state, with similar to modern geography and ∼400 ppmv atmospheric CO2 concentration, and is therefore often considered an interesting analogue for near-future climate projections. Paleoenvironmental reconstructions indicate higher surface temperatures, decreasing tropical deserts, and a more humid climate in West Africa characterized by a strengthened West African Monsoon (WAM). Using model results from the second phase of the Pliocene Modelling Intercomparison Project (PlioMIP2) ensemble, we analyse changes of the WAM rainfall during the mPWP by comparing them with the control simulations for the pre-industrial period. The ensemble shows a robust increase in the summer rainfall over West Africa and the Sahara region, with an average increase of 2.5 mm/d, contrasted by a rainfall decrease over the equatorial Atlantic. An anomalous warming of the Sahara and deepening of the Saharan Heat Low, seen in >90 % of the models, leads to a strengthening of the WAM and an increased monsoonal flow into the continent. A similar warming of the Sahara is seen in future projections using both phase 3 and 5 of the Coupled Model Intercomparison Project (CMIP3 and CMIP5). Though previous studies of future projections indicate a west–east drying–wetting contrast over the Sahel, PlioMIP2 simulations indicate a uniform rainfall increase in that region in warm climates characterized by increasing greenhouse gas forcing. We note that this effect will further depend on the long-term response of the vegetation to the CO2 forcing. International audience
Mémoires en Sciences... arrow_drop_down NORCE Research Archive; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: CC BYCopernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationsadd 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=11250/2980724&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Mémoires en Sciences... arrow_drop_down NORCE Research Archive; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: CC BYCopernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationsadd 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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description Publicationkeyboard_double_arrow_right Article , Other literature type 2021 Norway, Netherlands, France, United Kingdom, France, Norway EnglishPublisher:Copernicus Publications Funded by:NSERC, NSF | Collaborative Research: A..., NSF | The Management and Operat... +1 projectsNSERC ,NSF| Collaborative Research: Arctic Temperature Amplification during the Middle Pliocene (ArcAMP): Assessing the interaction among feedback mechanisms ,NSF| The Management and Operation of the National Center for Atmoshperic Research (NCAR) ,NSF| Collaborative Research: Paleoclimate perspective on the response of Southwest North American rainfall to elevated greenhouse gasesBerntell, E; Zhang, Q; Li, Q; Haywood, AM; Tindall, JC; Hunter, SJ; Zhang, Z; Li, X; Guo, C; Nisancioglu, KH; Stepanek, C; Lohmann, G; Sohl, LE; Chandler, MA; Tan, N; Contoux, C; Ramstein, G; Baatsen, MLJ; von der Heydt, AS; Chandan, D; Peltier, WR; Abe-Ouchi, A; Chan, W-L; Kamae, Y; Williams, CJR; Lunt, DJ; Feng, R; Otto-Bliesner, BL; Brady, EC;Abstract. The mid-Pliocene warm period (mPWP; ∼3.2 million years ago) is seen as the most recent time period characterized by a warm climate state, with similar to modern geography and ∼400 ppmv atmospheric CO2 concentration, and is therefore often considered an interesting analogue for near-future climate projections. Paleoenvironmental reconstructions indicate higher surface temperatures, decreasing tropical deserts, and a more humid climate in West Africa characterized by a strengthened West African Monsoon (WAM). Using model results from the second phase of the Pliocene Modelling Intercomparison Project (PlioMIP2) ensemble, we analyse changes of the WAM rainfall during the mPWP by comparing them with the control simulations for the pre-industrial period. The ensemble shows a robust increase in the summer rainfall over West Africa and the Sahara region, with an average increase of 2.5 mm/d, contrasted by a rainfall decrease over the equatorial Atlantic. An anomalous warming of the Sahara and deepening of the Saharan Heat Low, seen in >90 % of the models, leads to a strengthening of the WAM and an increased monsoonal flow into the continent. A similar warming of the Sahara is seen in future projections using both phase 3 and 5 of the Coupled Model Intercomparison Project (CMIP3 and CMIP5). Though previous studies of future projections indicate a west–east drying–wetting contrast over the Sahel, PlioMIP2 simulations indicate a uniform rainfall increase in that region in warm climates characterized by increasing greenhouse gas forcing. We note that this effect will further depend on the long-term response of the vegetation to the CO2 forcing. International audience
Mémoires en Sciences... arrow_drop_down NORCE Research Archive; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: CC BYCopernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationsadd 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=11250/2980724&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Mémoires en Sciences... arrow_drop_down NORCE Research Archive; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: CC BYCopernicus Publications; Climate of the Past (CP)Other literature type . 2021Data sources: Copernicus Publicationsadd 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=11250/2980724&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu