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: | https://doi.org/10.3389/fevo.2023.1176278 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00297-7 https://macau.uni-kiel.de/receive/macau_mods_00003616 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00004828/fevo-11-1176278.pdf |
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ftunivkiel:oai:macau.uni-kiel.de:macau_mods_00003616 2024-06-23T07:54:58+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. 2023 https://doi.org/10.3389/fevo.2023.1176278 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00297-7 https://macau.uni-kiel.de/receive/macau_mods_00003616 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00004828/fevo-11-1176278.pdf eng eng Frontiers in Ecology and Evolution -- 2296-701X https://doi.org/10.3389/fevo.2023.1176278 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00297-7 https://macau.uni-kiel.de/receive/macau_mods_00003616 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00004828/fevo-11-1176278.pdf https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess article ScholarlyArticle Published Version ddc:550 sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses article Text doc-type:Article 2023 ftunivkiel https://doi.org/10.3389/fevo.2023.1176278 2024-06-12T14:18:00Z 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 MACAU: Open Access Repository of Kiel University Frontiers in Ecology and Evolution 11 |
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MACAU: Open Access Repository of Kiel University |
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ftunivkiel |
language |
English |
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article ScholarlyArticle Published Version ddc:550 sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses |
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article ScholarlyArticle Published Version ddc:550 sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses 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 |
article ScholarlyArticle Published Version ddc:550 sea surface temperature multiproxy deglacial subtropical North Atlantic seasonality planktic foraminifera fauna analyses |
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 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. |
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 |
publishDate |
2023 |
url |
https://doi.org/10.3389/fevo.2023.1176278 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00297-7 https://macau.uni-kiel.de/receive/macau_mods_00003616 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00004828/fevo-11-1176278.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Frontiers in Ecology and Evolution -- 2296-701X https://doi.org/10.3389/fevo.2023.1176278 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00297-7 https://macau.uni-kiel.de/receive/macau_mods_00003616 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00004828/fevo-11-1176278.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ 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_ |
1802647335631585280 |