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Article: Greatly expanded tropical warm pool and weakened hadley circulation in the early pliocene

TitleGreatly expanded tropical warm pool and weakened hadley circulation in the early pliocene
Authors
Issue Date2009
PublisherAmerican Association for the Advancement of Science. The Journal's web site is located at http://sciencemag.org
Citation
Science, 2009, v. 323 n. 5922, p. 1714-1718 How to Cite?
AbstractThe Pliocene warm interval has been difficult to explain. We reconstructed the latitudinal distribution of sea surface temperature around 4 million years ago, during the early Pliocene. Our reconstruction shows that the meridional temperature gradient between the equator and subtropics was greatly reduced, implying a vast poleward expansion of the ocean tropical warm pool. Corroborating evidence indicates that the Pacific temperature contrast between the equator and 32°N has evolved from ∼2°C 4 million years ago to ∼8°C today. The meridional warm pool expansion evidently had enormous impacts on the Pliocene climate, including a slowdown of the atmospheric Hadley circulation and El Niño-like conditions in the equatorial region. Ultimately, sustaining a climate state with weak tropical sea surface temperature gradients may require additional mechanisms of ocean heat uptake (such as enhanced ocean vertical mixing).
Persistent Identifierhttp://hdl.handle.net/10722/58682
ISSN
2015 Impact Factor: 34.661
2015 SCImago Journal Rankings: 13.217
ISI Accession Number ID
Funding AgencyGrant Number
NSFOCE-0550439
OCE-0623487
U.S. Department of Energy Office of ScienceDE-FG02-06ER64238
DE-FG02-08ER64590
David and Lucile Packard Foundation fellowship
Flint Fellowship at Yale University
Funding Information:

A.V.F. thanks G. Philander, M. Barreiro, R. Pacanowski, Y. Rosenthal, C. Ravelo, P. deMenocal, P. Dekens, A. Haywood, and C. Wunsch for numerous discussions of this topic. Supported by NSF grant OCE-0550439, U.S. Department of Energy Office of Science grants DE-FG02-06ER64238 and DE-FG02-08ER64590, and a David and Lucile Packard Foundation fellowship (A.V.F.), NSF grant OCE-0623487 (T.D.H.), and a Flint Fellowship at Yale University (Z.L.).

References

 

DC FieldValueLanguage
dc.contributor.authorBrierley, CMen_HK
dc.contributor.authorFedorov, AVen_HK
dc.contributor.authorLiu, Zen_HK
dc.contributor.authorHerbert, TDen_HK
dc.contributor.authorLawrence, KTen_HK
dc.contributor.authorLaRiviere, JPen_HK
dc.date.accessioned2010-05-31T03:34:57Z-
dc.date.available2010-05-31T03:34:57Z-
dc.date.issued2009en_HK
dc.identifier.citationScience, 2009, v. 323 n. 5922, p. 1714-1718en_HK
dc.identifier.issn0036-8075en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58682-
dc.description.abstractThe Pliocene warm interval has been difficult to explain. We reconstructed the latitudinal distribution of sea surface temperature around 4 million years ago, during the early Pliocene. Our reconstruction shows that the meridional temperature gradient between the equator and subtropics was greatly reduced, implying a vast poleward expansion of the ocean tropical warm pool. Corroborating evidence indicates that the Pacific temperature contrast between the equator and 32°N has evolved from ∼2°C 4 million years ago to ∼8°C today. The meridional warm pool expansion evidently had enormous impacts on the Pliocene climate, including a slowdown of the atmospheric Hadley circulation and El Niño-like conditions in the equatorial region. Ultimately, sustaining a climate state with weak tropical sea surface temperature gradients may require additional mechanisms of ocean heat uptake (such as enhanced ocean vertical mixing).en_HK
dc.languageengen_HK
dc.publisherAmerican Association for the Advancement of Science. The Journal's web site is located at http://sciencemag.orgen_HK
dc.relation.ispartofScienceen_HK
dc.rightsScience. Copyright © American Association for the Advancement of Science.en_HK
dc.titleGreatly expanded tropical warm pool and weakened hadley circulation in the early plioceneen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0036-8075&volume=323&spage=1714&epage=1718&date=2009&atitle=Greatly+expanded+tropical+warm+pool+and+weakened+Hadley+circulation+in+the+early+Pliocene+en_HK
dc.identifier.emailLiu, Z:zhliu@hku.hken_HK
dc.identifier.authorityLiu, Z=rp00750en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1126/science.1167625en_HK
dc.identifier.scopuseid_2-s2.0-63449125943en_HK
dc.identifier.hkuros158082en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-63449125943&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume323en_HK
dc.identifier.issue5922en_HK
dc.identifier.spage1714en_HK
dc.identifier.epage1718en_HK
dc.identifier.eissn1095-9203-
dc.identifier.isiWOS:000264559800036-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridBrierley, CM=25635521800en_HK
dc.identifier.scopusauthoridFedorov, AV=7402999258en_HK
dc.identifier.scopusauthoridLiu, Z=16177844800en_HK
dc.identifier.scopusauthoridHerbert, TD=7005866440en_HK
dc.identifier.scopusauthoridLawrence, KT=23469562700en_HK
dc.identifier.scopusauthoridLaRiviere, JP=26425102400en_HK
dc.identifier.citeulike7042928-

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