Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years
Amplifying both internally generated variability and remote climate signals from the Atlantic Ocean via coupled air–sea instabilities, the eastern tropical Pacific (ETP) is well situated to detect past climate changes and variations in Central American wind systems that dynamically link the Atlantic...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://doi.org/10.1016/j.epsl.2014.04.008 |
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fteawag:oai:dora:eawag_7668 2024-09-09T19:57:28+00:00 Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years Dubois, Nathalie Kienast, Markus Kienast, Stephanie S. Timmermann, Axel 2014 https://doi.org/10.1016/j.epsl.2014.04.008 eng eng Elsevier Earth and Planetary Sciences Letters--Earth Planet. Sci. Lett.--journals:732--0012-821X--1385-013X eawag:7668 journal id: journals:732 issn: 0012-821X e-issn: 1385-013X ut: 000336819900014 local: 16732 doi:10.1016/j.epsl.2014.04.008 scopus: 2-s2.0-84899071414 uri: pmid: Eastern Pacific Heinrich events winds sea surface temperature alkenone EOF Text Journal Article 2014 fteawag https://doi.org/10.1016/j.epsl.2014.04.008 2024-08-05T03:04:28Z Amplifying both internally generated variability and remote climate signals from the Atlantic Ocean via coupled air–sea instabilities, the eastern tropical Pacific (ETP) is well situated to detect past climate changes and variations in Central American wind systems that dynamically link the Atlantic and the Pacific. Here we compare new and previously published alkenone-based sea surface temperature (SST) reconstructions from diverse environments within the ETP, i.e. the Eastern Pacific Warm Pool (EPWP), the equatorial and the northern Peruvian Upwelling regions over the past 100,000 yr. Over this time period, a fairly constant meridional temperature gradient across the region is observed, indicating similar hydrographic conditions during glacial and interglacial periods. The data further reveal that millennial-scale cold events associated with massive iceberg surges in the North Atlantic (Heinrich events) generate cooling in the ETP from ∼8°N to ∼2°S. Data from Heinrich event 1, however, indicate that the response changes sign south of 2°S. These millennial-scale alterations of the SST pattern across diverse environments of the ETP support previous climate modeling experiments that suggested an Atlantic–Pacific connection caused by the intensification of the Central American gap winds, enhanced upwelling and mixing north of the equator and supported by positive air–sea feedbacks in the eastern tropical Pacific. Article in Journal/Newspaper North Atlantic DORA Eawag Pacific Earth and Planetary Science Letters 396 134 142 |
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Open Polar |
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DORA Eawag |
op_collection_id |
fteawag |
language |
English |
topic |
Eastern Pacific Heinrich events winds sea surface temperature alkenone EOF |
spellingShingle |
Eastern Pacific Heinrich events winds sea surface temperature alkenone EOF Dubois, Nathalie Kienast, Markus Kienast, Stephanie S. Timmermann, Axel Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years |
topic_facet |
Eastern Pacific Heinrich events winds sea surface temperature alkenone EOF |
description |
Amplifying both internally generated variability and remote climate signals from the Atlantic Ocean via coupled air–sea instabilities, the eastern tropical Pacific (ETP) is well situated to detect past climate changes and variations in Central American wind systems that dynamically link the Atlantic and the Pacific. Here we compare new and previously published alkenone-based sea surface temperature (SST) reconstructions from diverse environments within the ETP, i.e. the Eastern Pacific Warm Pool (EPWP), the equatorial and the northern Peruvian Upwelling regions over the past 100,000 yr. Over this time period, a fairly constant meridional temperature gradient across the region is observed, indicating similar hydrographic conditions during glacial and interglacial periods. The data further reveal that millennial-scale cold events associated with massive iceberg surges in the North Atlantic (Heinrich events) generate cooling in the ETP from ∼8°N to ∼2°S. Data from Heinrich event 1, however, indicate that the response changes sign south of 2°S. These millennial-scale alterations of the SST pattern across diverse environments of the ETP support previous climate modeling experiments that suggested an Atlantic–Pacific connection caused by the intensification of the Central American gap winds, enhanced upwelling and mixing north of the equator and supported by positive air–sea feedbacks in the eastern tropical Pacific. |
format |
Article in Journal/Newspaper |
author |
Dubois, Nathalie Kienast, Markus Kienast, Stephanie S. Timmermann, Axel |
author_facet |
Dubois, Nathalie Kienast, Markus Kienast, Stephanie S. Timmermann, Axel |
author_sort |
Dubois, Nathalie |
title |
Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years |
title_short |
Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years |
title_full |
Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years |
title_fullStr |
Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years |
title_full_unstemmed |
Millennial-scale Atlantic/East Pacific sea surface temperature linkages during the last 100,000 years |
title_sort |
millennial-scale atlantic/east pacific sea surface temperature linkages during the last 100,000 years |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://doi.org/10.1016/j.epsl.2014.04.008 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Earth and Planetary Sciences Letters--Earth Planet. Sci. Lett.--journals:732--0012-821X--1385-013X eawag:7668 journal id: journals:732 issn: 0012-821X e-issn: 1385-013X ut: 000336819900014 local: 16732 doi:10.1016/j.epsl.2014.04.008 scopus: 2-s2.0-84899071414 uri: pmid: |
op_doi |
https://doi.org/10.1016/j.epsl.2014.04.008 |
container_title |
Earth and Planetary Science Letters |
container_volume |
396 |
container_start_page |
134 |
op_container_end_page |
142 |
_version_ |
1809928391060619264 |