Sea surface temperatures and planktonic foraminifera d18O from the chilean margin
The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudinal SST gradient in the...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.918122 2023-05-15T14:04:57+02:00 Sea surface temperatures and planktonic foraminifera d18O from the chilean margin Haddam, Naoufel Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnérat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine MEDIAN LATITUDE: -45.659667 * MEDIAN LONGITUDE: -75.732017 * SOUTH-BOUND LATITUDE: -49.167833 * WEST-BOUND LONGITUDE: -76.567167 * NORTH-BOUND LATITUDE: -41.602167 * EAST-BOUND LONGITUDE: -74.956667 * DATE/TIME START: 2007-02-09T14:34:00 * DATE/TIME END: 2007-02-16T03:07:00 2020-05-28 application/zip, 10 datasets https://doi.pangaea.de/10.1594/PANGAEA.918122 https://doi.org/10.1594/PANGAEA.918122 en eng PANGAEA Haddam, Naoufel; Siani, Giuseppe; Michel, Elisabeth; Kaiser, Jérôme; Lamy, Frank; Duchamp-Alphonse, Stéphanie; Hefter, Jens; Braconnot, Pascale; Dewilde, Fabien; Isguder, Gulay; Tisnérat-Laborde, Nadine; Thil, François; Durand, Nicolas; Kissel, Catherine (2018): Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial. Quaternary Science Reviews, 194, 62-76, https://doi.org/10.1016/j.quascirev.2018.06.023 https://doi.pangaea.de/10.1594/PANGAEA.918122 https://doi.org/10.1594/PANGAEA.918122 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY chilean margin planktonic foraminifera d18O Sea surface temperatures during the last 22 kyrs Dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.918122 https://doi.org/10.1016/j.quascirev.2018.06.023 2023-01-20T07:34:33Z The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudinal SST gradient in the SEP is a critical parameter for a better understanding of the mechanisms behind the abrupt climatic events since the last glacial period. Here we present, high-resolution records of SST, using planktonic foraminiferal assemblages and alkenone temperature reconstructions and stable oxygen and carbon isotopes from three deep-sea sediment cores along a latitudinal transect off the southern Chilean coast. This allowed us to reconstruct the variations of the latitudinal SST gradient and the Subtropical Front movements in the SEP. The SST results suggest a clear Antarctic timing consistent with the bipolar seesaw control, especially during the late glacial and the deglaciation. Our records do not suggest a complete oceanic heat transfer signal, highlighting the implication of an atmospheric component in the heat transfers between the two hemispheres, controlled by the latitudinal movements of the intertropical convergence zone in the Atlantic and the associated weaker South Pacific westerly split jet. Furthermore, our records indicate variable conditions during the Holocene, and also emphasize the influence of local fresh water inputs from the Patagonian ice sheet and/or precipitation on the SST fresh water input estimates along the Chilean margin (North and South of 49° S) from the onset of the deglaciation until 8 kyr cal. BP. Dataset Antarc* Antarctic Ice Sheet Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Pacific ENVELOPE(-76.567167,-74.956667,-41.602167,-49.167833) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
chilean margin planktonic foraminifera d18O Sea surface temperatures during the last 22 kyrs |
spellingShingle |
chilean margin planktonic foraminifera d18O Sea surface temperatures during the last 22 kyrs Haddam, Naoufel Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnérat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine Sea surface temperatures and planktonic foraminifera d18O from the chilean margin |
topic_facet |
chilean margin planktonic foraminifera d18O Sea surface temperatures during the last 22 kyrs |
description |
The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudinal SST gradient in the SEP is a critical parameter for a better understanding of the mechanisms behind the abrupt climatic events since the last glacial period. Here we present, high-resolution records of SST, using planktonic foraminiferal assemblages and alkenone temperature reconstructions and stable oxygen and carbon isotopes from three deep-sea sediment cores along a latitudinal transect off the southern Chilean coast. This allowed us to reconstruct the variations of the latitudinal SST gradient and the Subtropical Front movements in the SEP. The SST results suggest a clear Antarctic timing consistent with the bipolar seesaw control, especially during the late glacial and the deglaciation. Our records do not suggest a complete oceanic heat transfer signal, highlighting the implication of an atmospheric component in the heat transfers between the two hemispheres, controlled by the latitudinal movements of the intertropical convergence zone in the Atlantic and the associated weaker South Pacific westerly split jet. Furthermore, our records indicate variable conditions during the Holocene, and also emphasize the influence of local fresh water inputs from the Patagonian ice sheet and/or precipitation on the SST fresh water input estimates along the Chilean margin (North and South of 49° S) from the onset of the deglaciation until 8 kyr cal. BP. |
format |
Dataset |
author |
Haddam, Naoufel Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnérat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine |
author_facet |
Haddam, Naoufel Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnérat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine |
author_sort |
Haddam, Naoufel |
title |
Sea surface temperatures and planktonic foraminifera d18O from the chilean margin |
title_short |
Sea surface temperatures and planktonic foraminifera d18O from the chilean margin |
title_full |
Sea surface temperatures and planktonic foraminifera d18O from the chilean margin |
title_fullStr |
Sea surface temperatures and planktonic foraminifera d18O from the chilean margin |
title_full_unstemmed |
Sea surface temperatures and planktonic foraminifera d18O from the chilean margin |
title_sort |
sea surface temperatures and planktonic foraminifera d18o from the chilean margin |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.918122 https://doi.org/10.1594/PANGAEA.918122 |
op_coverage |
MEDIAN LATITUDE: -45.659667 * MEDIAN LONGITUDE: -75.732017 * SOUTH-BOUND LATITUDE: -49.167833 * WEST-BOUND LONGITUDE: -76.567167 * NORTH-BOUND LATITUDE: -41.602167 * EAST-BOUND LONGITUDE: -74.956667 * DATE/TIME START: 2007-02-09T14:34:00 * DATE/TIME END: 2007-02-16T03:07:00 |
long_lat |
ENVELOPE(-76.567167,-74.956667,-41.602167,-49.167833) |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Ice Sheet Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Ice Sheet Planktonic foraminifera |
op_relation |
Haddam, Naoufel; Siani, Giuseppe; Michel, Elisabeth; Kaiser, Jérôme; Lamy, Frank; Duchamp-Alphonse, Stéphanie; Hefter, Jens; Braconnot, Pascale; Dewilde, Fabien; Isguder, Gulay; Tisnérat-Laborde, Nadine; Thil, François; Durand, Nicolas; Kissel, Catherine (2018): Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial. Quaternary Science Reviews, 194, 62-76, https://doi.org/10.1016/j.quascirev.2018.06.023 https://doi.pangaea.de/10.1594/PANGAEA.918122 https://doi.org/10.1594/PANGAEA.918122 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.918122 https://doi.org/10.1016/j.quascirev.2018.06.023 |
_version_ |
1766276421448105984 |