Diatom based sea surface temperatures in core MD11-3353 (150kyrs record) ...

In the Southern Ocean (SO), climate-driven latitudinal migrations of the Antarctic Circumpolar Current (ACC) frontal system impact large-scale ocean circulation and primary productivity. Latitudinal migrations may not have been identical in all SO basins due to the presence or absence of regional ba...

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Bibliographic Details
Main Authors: Crosta, Xavier, Civel-Mazens, Matthieu, Cortese, Giuseppe, Michel, Elisabeth, Mazaud, Alain, Ther, Olivier, Ikehara, Minoru, Itaki, Takuya
Format: Dataset
Language:English
Published: PANGAEA 2022
Subjects:
Diatom
Kerguelen
MD11-3353
SST
transfer function
DEPTH, sediment/rock
AGE
Sea surface temperature
Calypso Corer II
SST, calculated from diatoms
MD185
Marion Dufresne 1995
Antarctic
Southern Ocean
The Antarctic
Antarc*
Online Access:https://dx.doi.org/10.1594/pangaea.945937
https://doi.pangaea.de/10.1594/PANGAEA.945937
Description
Summary:In the Southern Ocean (SO), climate-driven latitudinal migrations of the Antarctic Circumpolar Current (ACC) frontal system impact large-scale ocean circulation and primary productivity. Latitudinal migrations may not have been identical in all SO basins due to the presence or absence of regional bathymetric obstacles. The Antarctic Polar Front (APF), defined by the 3–5 °C surface temperature range and the 2 °C subsurface temperature minimum at 200 m, is particularly important for nutrient redistribution and biodiversity, influencing the soft tissue carbon pump in the modern SO. However, previous assessments of its migrations in the past, mostly based on a single metric or indirect observations, were not always robust. Here, we combine a new proxy for subsurface temperature (sub-ST) reconstructions based on radiolarian assemblages (sub-STrad), with relative abundance variations of key radiolarian species, and sea-surface temperatures (SST) reconstructions, based on diatom assemblages (SSTdiat), to refine ...

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