Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth
Past surface ocean circulation changes associated with the mid-Pleistocene transition, 0.9-0.6 Ma, were reconstructed in the northern North Atlantic (ODP 983) and the northwest Pacific (ODP 882), using proxies for subarctic/subpolar water mass distributions (7:4 alkenone) and sea surface temperature...
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Language: | English |
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2008
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ftuabarcelonapb:oai:ddd.uab.cat:25431 2024-09-30T14:36:36+00:00 Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth McClymont, Erin L. Rosell Melé, Antoni Haug, Gerald H. Lloyd, Jerry M. 2008 application/pdf https://ddd.uab.cat/record/25431 eng eng Paleoceanography Vol. 23, Issue 4, p. PA4214 (December 2008) https://ddd.uab.cat/record/25431 urn:10.1029/2008PA001622 urn:oai:ddd.uab.cat:25431 urn:recercauab:ARE-52757 urn:scopus_id:62149101903 urn:wos_id:000261888100001 urn:oai:egreta.uab.cat:publications/1d037495-3851-49ca-8c50-d4ea807f8875 open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Paleoclimatology Paleoceanography Oceans Atmosphere Hydrosphere Cryosphere interactions Article 2008 ftuabarcelonapb 2024-09-04T06:59:19Z Past surface ocean circulation changes associated with the mid-Pleistocene transition, 0.9-0.6 Ma, were reconstructed in the northern North Atlantic (ODP 983) and the northwest Pacific (ODP 882), using proxies for subarctic/subpolar water mass distributions (7:4 alkenone) and sea surface temperature (U37K). Both sites experienced a secular expansion of subarctic waters from ∼1.15 Ma, spanning both glacial and interglacial intervals. After 0.9 Ma, low 7:4 at Site 983 records a northward retreat of subarctic waters during interglacials in the Atlantic, while continued high glacial 7:4 indicate extensive subarctic waters during glacial maxima associated with the development of the larger late Pleistocene ice sheets. In contrast, a secular decline in 7:4 occurred at Site 882 from 0.9 to 0.5 Ma, marking a more gradual retreat of subarctic conditions in the Pacific. It is proposed that the expansion of subarctic waters between 1.15 and 0.9 Ma exerted negative feedbacks to the moisture supply to the ice sheet source regions and may account for the apparent delayed ice sheet response to atmosphere-ocean circulation changes associated with the mid-Pleistocene transition that began as early as 1.2 Ma. Article in Journal/Newspaper Ice Sheet North Atlantic Subarctic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Pacific Paleoceanography 23 4 n/a n/a |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Paleoclimatology Paleoceanography Oceans Atmosphere Hydrosphere Cryosphere interactions |
spellingShingle |
Paleoclimatology Paleoceanography Oceans Atmosphere Hydrosphere Cryosphere interactions McClymont, Erin L. Rosell Melé, Antoni Haug, Gerald H. Lloyd, Jerry M. Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth |
topic_facet |
Paleoclimatology Paleoceanography Oceans Atmosphere Hydrosphere Cryosphere interactions |
description |
Past surface ocean circulation changes associated with the mid-Pleistocene transition, 0.9-0.6 Ma, were reconstructed in the northern North Atlantic (ODP 983) and the northwest Pacific (ODP 882), using proxies for subarctic/subpolar water mass distributions (7:4 alkenone) and sea surface temperature (U37K). Both sites experienced a secular expansion of subarctic waters from ∼1.15 Ma, spanning both glacial and interglacial intervals. After 0.9 Ma, low 7:4 at Site 983 records a northward retreat of subarctic waters during interglacials in the Atlantic, while continued high glacial 7:4 indicate extensive subarctic waters during glacial maxima associated with the development of the larger late Pleistocene ice sheets. In contrast, a secular decline in 7:4 occurred at Site 882 from 0.9 to 0.5 Ma, marking a more gradual retreat of subarctic conditions in the Pacific. It is proposed that the expansion of subarctic waters between 1.15 and 0.9 Ma exerted negative feedbacks to the moisture supply to the ice sheet source regions and may account for the apparent delayed ice sheet response to atmosphere-ocean circulation changes associated with the mid-Pleistocene transition that began as early as 1.2 Ma. |
format |
Article in Journal/Newspaper |
author |
McClymont, Erin L. Rosell Melé, Antoni Haug, Gerald H. Lloyd, Jerry M. |
author_facet |
McClymont, Erin L. Rosell Melé, Antoni Haug, Gerald H. Lloyd, Jerry M. |
author_sort |
McClymont, Erin L. |
title |
Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth |
title_short |
Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth |
title_full |
Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth |
title_fullStr |
Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth |
title_full_unstemmed |
Expansion of subarctic water masses in the North Atlantic and Pacific oceans and implications for mid-Pleistocene ice sheet growth |
title_sort |
expansion of subarctic water masses in the north atlantic and pacific oceans and implications for mid-pleistocene ice sheet growth |
publishDate |
2008 |
url |
https://ddd.uab.cat/record/25431 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet North Atlantic Subarctic |
genre_facet |
Ice Sheet North Atlantic Subarctic |
op_relation |
Paleoceanography Vol. 23, Issue 4, p. PA4214 (December 2008) https://ddd.uab.cat/record/25431 urn:10.1029/2008PA001622 urn:oai:ddd.uab.cat:25431 urn:recercauab:ARE-52757 urn:scopus_id:62149101903 urn:wos_id:000261888100001 urn:oai:egreta.uab.cat:publications/1d037495-3851-49ca-8c50-d4ea807f8875 |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Paleoceanography |
container_volume |
23 |
container_issue |
4 |
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n/a |
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1811639633895751680 |