Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1
International audience Abundant hydroclimatic evidence from western Amazonia and the adjacent Andes documents wet conditions during Heinrich Stadial 1 (HS1, 18-15 ka), a cold period in the high latitudes of the North Atlantic. This precipitation anomaly was attributed to a strengthening of the South...
Published in: | Scientific Reports |
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Main Authors: | , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2016
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Online Access: | https://hal.science/hal-02180994 https://hal.science/hal-02180994/document https://hal.science/hal-02180994/file/Zhang%28Y%29-SREP2016.pdf https://doi.org/10.1038/srep35866 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology Zhang, Yancheng Zhang, Xu Chiessi, Cristiano, M Mulitza, Stefan Zhang, Xiao Lohmann, Gerrit Prange, Matthias Behling, Hermann Zabel, Matthias Govin, Aline Sawakuchi, André, O Cruz, Francisco, W Wefer, Gerold Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1 |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology |
description |
International audience Abundant hydroclimatic evidence from western Amazonia and the adjacent Andes documents wet conditions during Heinrich Stadial 1 (HS1, 18-15 ka), a cold period in the high latitudes of the North Atlantic. This precipitation anomaly was attributed to a strengthening of the South American summer monsoon due to a change in the Atlantic interhemispheric sea surface temperature (SST) gradient. However, the physical viability of this mechanism has never been rigorously tested. We address this issue by combining a thorough compilation of tropical South American paleorecords and a set of atmosphere model sensitivity experiments. Our results show that the Atlantic SST variations alone, although leading to dry conditions in northern South America and wet conditions in northeastern Brazil, cannot produce increased precipitation over western Amazonia and the adjacent Andes during HS1. Instead, an eastern equatorial Pacific SST increase (i.e., 0.5-1.5 °C), in response to the slowdown of the Atlantic Meridional Overturning Circulation during HS1, is crucial to generate the wet conditions in these regions. The mechanism works via anomalous low sea level pressure over the eastern equatorial Pacific, which promotes a regional easterly low-level wind anomaly and moisture recycling from central Amazonia towards the Andes. |
author2 |
Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Universidade de São Paulo = University of São Paulo (USP) Nanjing University of Information Science and Technology (NUIST) Albrecht-von-Haller Institut für Pflanzenwissenschaften Georg-August-University = Georg-August-Universität Göttingen Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Climat et Magnétisme (CLIMAG) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Zhang, Yancheng Zhang, Xu Chiessi, Cristiano, M Mulitza, Stefan Zhang, Xiao Lohmann, Gerrit Prange, Matthias Behling, Hermann Zabel, Matthias Govin, Aline Sawakuchi, André, O Cruz, Francisco, W Wefer, Gerold |
author_facet |
Zhang, Yancheng Zhang, Xu Chiessi, Cristiano, M Mulitza, Stefan Zhang, Xiao Lohmann, Gerrit Prange, Matthias Behling, Hermann Zabel, Matthias Govin, Aline Sawakuchi, André, O Cruz, Francisco, W Wefer, Gerold |
author_sort |
Zhang, Yancheng |
title |
Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1 |
title_short |
Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1 |
title_full |
Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1 |
title_fullStr |
Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1 |
title_full_unstemmed |
Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1 |
title_sort |
equatorial pacific forcing of western amazonian precipitation during heinrich stadial 1 |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-02180994 https://hal.science/hal-02180994/document https://hal.science/hal-02180994/file/Zhang%28Y%29-SREP2016.pdf https://doi.org/10.1038/srep35866 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-02180994 Scientific Reports, 2016, 6, pp.35866. ⟨10.1038/srep35866⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/srep35866 hal-02180994 https://hal.science/hal-02180994 https://hal.science/hal-02180994/document https://hal.science/hal-02180994/file/Zhang%28Y%29-SREP2016.pdf doi:10.1038/srep35866 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/srep35866 |
container_title |
Scientific Reports |
container_volume |
6 |
container_issue |
1 |
_version_ |
1797588586306994176 |
spelling |
ftinsu:oai:HAL:hal-02180994v1 2024-04-28T08:30:52+00:00 Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1 Zhang, Yancheng Zhang, Xu Chiessi, Cristiano, M Mulitza, Stefan Zhang, Xiao Lohmann, Gerrit Prange, Matthias Behling, Hermann Zabel, Matthias Govin, Aline Sawakuchi, André, O Cruz, Francisco, W Wefer, Gerold Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Universidade de São Paulo = University of São Paulo (USP) Nanjing University of Information Science and Technology (NUIST) Albrecht-von-Haller Institut für Pflanzenwissenschaften Georg-August-University = Georg-August-Universität Göttingen Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Climat et Magnétisme (CLIMAG) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2016 https://hal.science/hal-02180994 https://hal.science/hal-02180994/document https://hal.science/hal-02180994/file/Zhang%28Y%29-SREP2016.pdf https://doi.org/10.1038/srep35866 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/srep35866 hal-02180994 https://hal.science/hal-02180994 https://hal.science/hal-02180994/document https://hal.science/hal-02180994/file/Zhang%28Y%29-SREP2016.pdf doi:10.1038/srep35866 info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-02180994 Scientific Reports, 2016, 6, pp.35866. ⟨10.1038/srep35866⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1038/srep35866 2024-04-05T00:44:04Z International audience Abundant hydroclimatic evidence from western Amazonia and the adjacent Andes documents wet conditions during Heinrich Stadial 1 (HS1, 18-15 ka), a cold period in the high latitudes of the North Atlantic. This precipitation anomaly was attributed to a strengthening of the South American summer monsoon due to a change in the Atlantic interhemispheric sea surface temperature (SST) gradient. However, the physical viability of this mechanism has never been rigorously tested. We address this issue by combining a thorough compilation of tropical South American paleorecords and a set of atmosphere model sensitivity experiments. Our results show that the Atlantic SST variations alone, although leading to dry conditions in northern South America and wet conditions in northeastern Brazil, cannot produce increased precipitation over western Amazonia and the adjacent Andes during HS1. Instead, an eastern equatorial Pacific SST increase (i.e., 0.5-1.5 °C), in response to the slowdown of the Atlantic Meridional Overturning Circulation during HS1, is crucial to generate the wet conditions in these regions. The mechanism works via anomalous low sea level pressure over the eastern equatorial Pacific, which promotes a regional easterly low-level wind anomaly and moisture recycling from central Amazonia towards the Andes. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Scientific Reports 6 1 |