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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fttriple:oai:gotriple.eu:10670/1.9bhtsz 2023-05-15T16:27:09+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. https://doi.org/10.1038/ngeo1712 https://archimer.ifremer.fr/doc/00264/37556/35774.pdf https://archimer.ifremer.fr/doc/00264/37556/ en eng Nature Publishing Group doi:10.1038/ngeo1712 10670/1.9bhtsz https://archimer.ifremer.fr/doc/00264/37556/35774.pdf https://archimer.ifremer.fr/doc/00264/37556/ other Archimer, archive institutionnelle de l'Ifremer Nature Geoscience (1752-0894) (Nature Publishing Group), 2013-03 , Vol. 6 , N. 3 , P. 213-217 envir anthro-bio Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1038/ngeo1712 2023-01-22T16:45:09Z 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. Text Greenland North Atlantic Sea ice Unknown Greenland Indian Nature Geoscience 6 3 213 217 |
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envir anthro-bio 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 |
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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 |
Text |
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 |
publisher |
Nature Publishing Group |
url |
https://doi.org/10.1038/ngeo1712 https://archimer.ifremer.fr/doc/00264/37556/35774.pdf https://archimer.ifremer.fr/doc/00264/37556/ |
geographic |
Greenland Indian |
geographic_facet |
Greenland Indian |
genre |
Greenland North Atlantic Sea ice |
genre_facet |
Greenland North Atlantic Sea ice |
op_source |
Archimer, archive institutionnelle de l'Ifremer Nature Geoscience (1752-0894) (Nature Publishing Group), 2013-03 , Vol. 6 , N. 3 , P. 213-217 |
op_relation |
doi:10.1038/ngeo1712 10670/1.9bhtsz https://archimer.ifremer.fr/doc/00264/37556/35774.pdf https://archimer.ifremer.fr/doc/00264/37556/ |
op_rights |
other |
op_doi |
https://doi.org/10.1038/ngeo1712 |
container_title |
Nature Geoscience |
container_volume |
6 |
container_issue |
3 |
container_start_page |
213 |
op_container_end_page |
217 |
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