Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic
International audience Reliable reconstruction of past sea surface temperature (SST) is of prime importance for understanding the Earth’s sensitivity to external forcing. Yet, it remains a major challenge in paleoceanography because comparison between SST estimates from different proxies reveals mis...
Published in: | Frontiers in Ecology and Evolution |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2023
|
Subjects: | |
Online Access: | https://amu.hal.science/hal-04088485 https://amu.hal.science/hal-04088485/document https://amu.hal.science/hal-04088485/file/Repschlaeger%20et%20al_2023_fevo-11-1176278.pdf https://doi.org/10.3389/fevo.2023.1176278 |
id |
ftunivaixmarseil:oai:HAL:hal-04088485v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivaixmarseil:oai:HAL:hal-04088485v1 2024-05-12T08:07:43+00:00 Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic Repschläger, Janne Weinelt, Mara Schneider, Ralph Blanz, Thomas Leduc, Guillaume Schiebel, Ralf Haug, Gerald, H Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel (CAU) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2023-04-24 https://amu.hal.science/hal-04088485 https://amu.hal.science/hal-04088485/document https://amu.hal.science/hal-04088485/file/Repschlaeger%20et%20al_2023_fevo-11-1176278.pdf https://doi.org/10.3389/fevo.2023.1176278 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fevo.2023.1176278 hal-04088485 https://amu.hal.science/hal-04088485 https://amu.hal.science/hal-04088485/document https://amu.hal.science/hal-04088485/file/Repschlaeger%20et%20al_2023_fevo-11-1176278.pdf doi:10.3389/fevo.2023.1176278 WOS: 000985931300001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2296-701X Frontiers in Ecology and Evolution https://amu.hal.science/hal-04088485 Frontiers in Ecology and Evolution, 2023, 11, pp.1176278. ⟨10.3389/fevo.2023.1176278⟩ sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2023 ftunivaixmarseil https://doi.org/10.3389/fevo.2023.1176278 2024-04-18T00:30:32Z International audience Reliable reconstruction of past sea surface temperature (SST) is of prime importance for understanding the Earth’s sensitivity to external forcing. Yet, it remains a major challenge in paleoceanography because comparison between SST estimates from different proxies reveals mismatches and raise the question as to what the contrasting proxies actually record. A better understanding of these mismatches in the light of seasonal occurrence of the proxy bearing organisms (archives) and water mass changes help to assess climate models. Here, we analyze data from the last deglaciation using a sediment core site situated at the northern boundary of the North Atlantic subtropical gyre influenced by fast latitudinal migrations of the subtropical Azores Front (AF) and resulting changes in water masses that may affect the SST records. Differences between the SST estimates from different deglacial SST reconstructions obtained from (1) Mg/Ca in planktic foraminifer tests, (2) alkenone UK′37, and (3) planktic foraminifer assemblages (SIMMAX), are assumed to result from the ecology of the proxy bearing organisms, and are assessed for the impact on different SST reconstructions from local seawater δ18O (δ18Ow) reconstructions. The general trends of SSTs from all four proxies confirm the well-known deglacial succession of warm and cold events. Mismatches between amplitudes of temperature changes are explained by differences in the phenology of the proxy-bearing organisms and local changes in hydrography. The combination of δ18O SST from the three different archives of δ18Ow reconstructions may cause offsets that exceed the climate driven signals. Article in Journal/Newspaper North Atlantic Aix-Marseille Université: HAL Frontiers in Ecology and Evolution 11 |
institution |
Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
English |
topic |
sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses [SDE]Environmental Sciences |
spellingShingle |
sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses [SDE]Environmental Sciences Repschläger, Janne Weinelt, Mara Schneider, Ralph Blanz, Thomas Leduc, Guillaume Schiebel, Ralf Haug, Gerald, H Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic |
topic_facet |
sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses [SDE]Environmental Sciences |
description |
International audience Reliable reconstruction of past sea surface temperature (SST) is of prime importance for understanding the Earth’s sensitivity to external forcing. Yet, it remains a major challenge in paleoceanography because comparison between SST estimates from different proxies reveals mismatches and raise the question as to what the contrasting proxies actually record. A better understanding of these mismatches in the light of seasonal occurrence of the proxy bearing organisms (archives) and water mass changes help to assess climate models. Here, we analyze data from the last deglaciation using a sediment core site situated at the northern boundary of the North Atlantic subtropical gyre influenced by fast latitudinal migrations of the subtropical Azores Front (AF) and resulting changes in water masses that may affect the SST records. Differences between the SST estimates from different deglacial SST reconstructions obtained from (1) Mg/Ca in planktic foraminifer tests, (2) alkenone UK′37, and (3) planktic foraminifer assemblages (SIMMAX), are assumed to result from the ecology of the proxy bearing organisms, and are assessed for the impact on different SST reconstructions from local seawater δ18O (δ18Ow) reconstructions. The general trends of SSTs from all four proxies confirm the well-known deglacial succession of warm and cold events. Mismatches between amplitudes of temperature changes are explained by differences in the phenology of the proxy-bearing organisms and local changes in hydrography. The combination of δ18O SST from the three different archives of δ18Ow reconstructions may cause offsets that exceed the climate driven signals. |
author2 |
Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel (CAU) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Article in Journal/Newspaper |
author |
Repschläger, Janne Weinelt, Mara Schneider, Ralph Blanz, Thomas Leduc, Guillaume Schiebel, Ralf Haug, Gerald, H |
author_facet |
Repschläger, Janne Weinelt, Mara Schneider, Ralph Blanz, Thomas Leduc, Guillaume Schiebel, Ralf Haug, Gerald, H |
author_sort |
Repschläger, Janne |
title |
Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic |
title_short |
Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic |
title_full |
Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic |
title_fullStr |
Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic |
title_full_unstemmed |
Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic |
title_sort |
disentangling multiproxy temperature reconstructions from the subtropical north atlantic |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://amu.hal.science/hal-04088485 https://amu.hal.science/hal-04088485/document https://amu.hal.science/hal-04088485/file/Repschlaeger%20et%20al_2023_fevo-11-1176278.pdf https://doi.org/10.3389/fevo.2023.1176278 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2296-701X Frontiers in Ecology and Evolution https://amu.hal.science/hal-04088485 Frontiers in Ecology and Evolution, 2023, 11, pp.1176278. ⟨10.3389/fevo.2023.1176278⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fevo.2023.1176278 hal-04088485 https://amu.hal.science/hal-04088485 https://amu.hal.science/hal-04088485/document https://amu.hal.science/hal-04088485/file/Repschlaeger%20et%20al_2023_fevo-11-1176278.pdf doi:10.3389/fevo.2023.1176278 WOS: 000985931300001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/fevo.2023.1176278 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
11 |
_version_ |
1798850483807322112 |