Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition
Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 19 (2004): PA4029, doi:10.1029/2003PA000892. We compare a new mid-Pleistocene...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3421 2023-05-15T18:18:45+02:00 Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition Schefuß, Enno Sinninghe Damste, Jaap S. Jansen, J. H. Fred 2004-12-28 application/pdf https://hdl.handle.net/1912/3421 en_US eng American Geophysical Union https://hdl.handle.net/1912/3438 https://doi.org/10.1029/2003PA000892 Paleoceanography 19 (2004): PA4029 https://hdl.handle.net/1912/3421 doi:10.1029/2003PA000892 Paleoceanography 19 (2004): PA4029 doi:10.1029/2003PA000892 Sea surface temperatures Mid-Pleistocene transition Tropical Atlantic Article 2004 ftwhoas https://doi.org/10.1029/2003PA000892 2022-05-28T22:57:58Z Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 19 (2004): PA4029, doi:10.1029/2003PA000892. We compare a new mid-Pleistocene sea surface temperature (SST) record from the eastern tropical Atlantic to changes in continental ice volume, orbital insolation, Atlantic deepwater ventilation, and Southern Ocean front positions to resolve forcing mechanisms of tropical Atlantic SST during the mid-Pleistocene transition (MPT). At the onset of the MPT, a strong tropical cooling occurred. The change from a obliquity- to a eccentricity-dominated cyclicity in the tropical SST took place at about 650 kyr BP. In orbital cycles, tropical SST changes significantly preceded continental ice-volume changes but were in phase with movements of Southern Ocean fronts. After the onset of large-amplitude 100-kyr variations, additional late glacial warming in the eastern tropical Atlantic was caused by enhanced return flow of warm waters from the western Atlantic driven by strong trade winds. Pronounced 80-kyr variations in tropical SST occurred during the MPT, in phase with and likely directly forced by transitional continental ice-volume variations. During the MPT, a prominent anomalous long-term tropical warming occurred, likely generated by extremely northward displaced Southern Ocean fronts. While the overall pattern of global climate variability during the MPT was determined by changes in mean state and frequency of continental ice volume variations, tropical Atlantic SST variations were primarily driven by early changes in Subantarctic sea-ice extent and coupled Southern Ocean frontal positions. The Dutch scientific funding organization (NWO) is thanked for financial support (project 75019617). Article in Journal/Newspaper Sea ice Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Southern Ocean Paleoceanography 19 4 n/a n/a |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Sea surface temperatures Mid-Pleistocene transition Tropical Atlantic |
spellingShingle |
Sea surface temperatures Mid-Pleistocene transition Tropical Atlantic Schefuß, Enno Sinninghe Damste, Jaap S. Jansen, J. H. Fred Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition |
topic_facet |
Sea surface temperatures Mid-Pleistocene transition Tropical Atlantic |
description |
Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 19 (2004): PA4029, doi:10.1029/2003PA000892. We compare a new mid-Pleistocene sea surface temperature (SST) record from the eastern tropical Atlantic to changes in continental ice volume, orbital insolation, Atlantic deepwater ventilation, and Southern Ocean front positions to resolve forcing mechanisms of tropical Atlantic SST during the mid-Pleistocene transition (MPT). At the onset of the MPT, a strong tropical cooling occurred. The change from a obliquity- to a eccentricity-dominated cyclicity in the tropical SST took place at about 650 kyr BP. In orbital cycles, tropical SST changes significantly preceded continental ice-volume changes but were in phase with movements of Southern Ocean fronts. After the onset of large-amplitude 100-kyr variations, additional late glacial warming in the eastern tropical Atlantic was caused by enhanced return flow of warm waters from the western Atlantic driven by strong trade winds. Pronounced 80-kyr variations in tropical SST occurred during the MPT, in phase with and likely directly forced by transitional continental ice-volume variations. During the MPT, a prominent anomalous long-term tropical warming occurred, likely generated by extremely northward displaced Southern Ocean fronts. While the overall pattern of global climate variability during the MPT was determined by changes in mean state and frequency of continental ice volume variations, tropical Atlantic SST variations were primarily driven by early changes in Subantarctic sea-ice extent and coupled Southern Ocean frontal positions. The Dutch scientific funding organization (NWO) is thanked for financial support (project 75019617). |
format |
Article in Journal/Newspaper |
author |
Schefuß, Enno Sinninghe Damste, Jaap S. Jansen, J. H. Fred |
author_facet |
Schefuß, Enno Sinninghe Damste, Jaap S. Jansen, J. H. Fred |
author_sort |
Schefuß, Enno |
title |
Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition |
title_short |
Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition |
title_full |
Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition |
title_fullStr |
Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition |
title_full_unstemmed |
Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition |
title_sort |
forcing of tropical atlantic sea surface temperatures during the mid-pleistocene transition |
publisher |
American Geophysical Union |
publishDate |
2004 |
url |
https://hdl.handle.net/1912/3421 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
Paleoceanography 19 (2004): PA4029 doi:10.1029/2003PA000892 |
op_relation |
https://hdl.handle.net/1912/3438 https://doi.org/10.1029/2003PA000892 Paleoceanography 19 (2004): PA4029 https://hdl.handle.net/1912/3421 doi:10.1029/2003PA000892 |
op_doi |
https://doi.org/10.1029/2003PA000892 |
container_title |
Paleoceanography |
container_volume |
19 |
container_issue |
4 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766195453254172672 |