Links between tropical rainfall and North Atlantic climate during the last glacial period
During the last glacial period, the North Atlantic region experienced pronounced, millennial-scale alternations between cold, stadial conditions and milder interstadial conditions-commonly referred to as Dansgaard-Oeschger oscillations-as well as periods of massive iceberg discharge known as Heinric...
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:35170 2023-05-15T16:27:10+02:00 Links between tropical rainfall and North Atlantic climate during the last glacial period Deplazes, Gaudenz Lueckge, Andreas Peterson, Larry C. Timmermann, Axel Hamann, Yvonne Hughen, Konrad A. Roehl, Ursula Laj, Carlo Cane, Mark A. Sigman, Daniel M. Haug, Gerald H. 2013 https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35170 https://doi.org/10.1038/ngeo1712 eng eng https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35170 https://doi.org/10.1038/ngeo1712 info:eu-repo/semantics/closedAccess Institut für Geowissenschaften article doc-type:article 2013 ftubpotsdam https://doi.org/10.1038/ngeo1712 2022-07-28T20:45:41Z During the last glacial period, the North Atlantic region experienced pronounced, millennial-scale alternations between cold, stadial conditions and milder interstadial conditions-commonly referred to as Dansgaard-Oeschger oscillations-as well as periods of massive iceberg discharge known as Heinrich events(1). Changes in Northern Hemisphere temperature, as recorded in Greenland(2-4), are thought to have affected the location of the Atlantic intertropical convergence zone(5,6) and the strength of the Indian summer monsoon(7,8). Here we use high-resolution records of sediment colour-a measure of terrigenous versus biogenic content-from the Cariaco Basin off the coast of Venezuela and the Arabian Sea to assess teleconnections with the North Atlantic climate system during the last glacial period. The Cariaco record indicates that the intertropical convergence zone migrated seasonally over the site during mild stadial conditions, but was permanently displaced south of the basin during peak stadials and Heinrich events. In the Arabian Sea, we find evidence of a weak Indian summer monsoon during the stadial events. The tropical records show a more variable response to North Atlantic cooling than the Greenland temperature records. We therefore suggest that Greenland climate is especially sensitive to variations in the North Atlantic system-in particular sea-ice extent-whereas the intertropical convergence zone and Indian monsoon system respond primarily to variations in mean Northern Hemisphere temperature. Article in Journal/Newspaper Greenland North Atlantic Sea ice University of Potsdam: publish.UP Greenland Indian Nature Geoscience 6 3 213 217 |
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University of Potsdam: publish.UP |
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ftubpotsdam |
language |
English |
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Institut für Geowissenschaften |
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Institut für Geowissenschaften Deplazes, Gaudenz Lueckge, Andreas Peterson, Larry C. Timmermann, Axel Hamann, Yvonne Hughen, Konrad A. Roehl, Ursula Laj, Carlo Cane, Mark A. Sigman, Daniel M. Haug, Gerald H. Links between tropical rainfall and North Atlantic climate during the last glacial period |
topic_facet |
Institut für Geowissenschaften |
description |
During the last glacial period, the North Atlantic region experienced pronounced, millennial-scale alternations between cold, stadial conditions and milder interstadial conditions-commonly referred to as Dansgaard-Oeschger oscillations-as well as periods of massive iceberg discharge known as Heinrich events(1). Changes in Northern Hemisphere temperature, as recorded in Greenland(2-4), are thought to have affected the location of the Atlantic intertropical convergence zone(5,6) and the strength of the Indian summer monsoon(7,8). Here we use high-resolution records of sediment colour-a measure of terrigenous versus biogenic content-from the Cariaco Basin off the coast of Venezuela and the Arabian Sea to assess teleconnections with the North Atlantic climate system during the last glacial period. The Cariaco record indicates that the intertropical convergence zone migrated seasonally over the site during mild stadial conditions, but was permanently displaced south of the basin during peak stadials and Heinrich events. In the Arabian Sea, we find evidence of a weak Indian summer monsoon during the stadial events. The tropical records show a more variable response to North Atlantic cooling than the Greenland temperature records. We therefore suggest that Greenland climate is especially sensitive to variations in the North Atlantic system-in particular sea-ice extent-whereas the intertropical convergence zone and Indian monsoon system respond primarily to variations in mean Northern Hemisphere temperature. |
format |
Article in Journal/Newspaper |
author |
Deplazes, Gaudenz Lueckge, Andreas Peterson, Larry C. Timmermann, Axel Hamann, Yvonne Hughen, Konrad A. Roehl, Ursula Laj, Carlo Cane, Mark A. Sigman, Daniel M. Haug, Gerald H. |
author_facet |
Deplazes, Gaudenz Lueckge, Andreas Peterson, Larry C. Timmermann, Axel Hamann, Yvonne Hughen, Konrad A. Roehl, Ursula Laj, Carlo Cane, Mark A. Sigman, Daniel M. Haug, Gerald H. |
author_sort |
Deplazes, Gaudenz |
title |
Links between tropical rainfall and North Atlantic climate during the last glacial period |
title_short |
Links between tropical rainfall and North Atlantic climate during the last glacial period |
title_full |
Links between tropical rainfall and North Atlantic climate during the last glacial period |
title_fullStr |
Links between tropical rainfall and North Atlantic climate during the last glacial period |
title_full_unstemmed |
Links between tropical rainfall and North Atlantic climate during the last glacial period |
title_sort |
links between tropical rainfall and north atlantic climate during the last glacial period |
publishDate |
2013 |
url |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35170 https://doi.org/10.1038/ngeo1712 |
geographic |
Greenland Indian |
geographic_facet |
Greenland Indian |
genre |
Greenland North Atlantic Sea ice |
genre_facet |
Greenland North Atlantic Sea ice |
op_relation |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35170 https://doi.org/10.1038/ngeo1712 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1038/ngeo1712 |
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Nature Geoscience |
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6 |
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3 |
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213 |
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217 |
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1766016263150108672 |