Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic
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 q...
Published in: | Frontiers in Ecology and Evolution |
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Online Access: | http://dx.doi.org/10.3389/fevo.2023.1176278 https://www.frontiersin.org/articles/10.3389/fevo.2023.1176278/full |
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crfrontiers:10.3389/fevo.2023.1176278 2024-02-11T10:06:17+01:00 Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic Repschläger, Janne Weinelt, Mara Schneider, Ralph Blanz, Thomas Leduc, Guillaume Schiebel, Ralf Haug, Gerald H. European Science Foundation 2023 http://dx.doi.org/10.3389/fevo.2023.1176278 https://www.frontiersin.org/articles/10.3389/fevo.2023.1176278/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Ecology and Evolution volume 11 ISSN 2296-701X Ecology Ecology, Evolution, Behavior and Systematics journal-article 2023 crfrontiers https://doi.org/10.3389/fevo.2023.1176278 2024-01-26T09:59:07Z 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 U K ′ 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 δ 18 O (δ 18 O w ) 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 δ 18 O SST from the three different archives of δ 18 O w reconstructions may cause offsets that exceed the climate driven signals. Article in Journal/Newspaper North Atlantic Frontiers (Publisher) Frontiers in Ecology and Evolution 11 |
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Ecology Ecology, Evolution, Behavior and Systematics |
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Ecology Ecology, Evolution, Behavior and Systematics 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 |
Ecology Ecology, Evolution, Behavior and Systematics |
description |
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 U K ′ 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 δ 18 O (δ 18 O w ) 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 δ 18 O SST from the three different archives of δ 18 O w reconstructions may cause offsets that exceed the climate driven signals. |
author2 |
European Science Foundation |
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 |
Frontiers Media SA |
publishDate |
2023 |
url |
http://dx.doi.org/10.3389/fevo.2023.1176278 https://www.frontiersin.org/articles/10.3389/fevo.2023.1176278/full |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Ecology and Evolution volume 11 ISSN 2296-701X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fevo.2023.1176278 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
11 |
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1790603916462784512 |