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...

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Bibliographic Details
Main Authors: Repschläger, Janne, Weinelt, Mara, Schneider, Ralph, Blanz, Thomas, Leduc, Guillaume, Schiebel, Ralf, Haug, Gerald H.
Format: Article in Journal/Newspaper
Language:English
Published: ETH Zurich 2023
Subjects:
sea surface temperature
multiproxy
deglacial
subtropical
North Atlantic
seasonality
planktic foraminifera fauna analyses
Online Access:https://dx.doi.org/10.3929/ethz-b-000612888
http://hdl.handle.net/20.500.11850/612888
Description
Summary: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 ... : Frontiers in Ecology and Evolution, 11 ...

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