georefid:2010-079022SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-07-06T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1126/science.1185435<gco:CharacterString>Tropical ocean temperatures over the past 3.5 million years</gco:CharacterString>2010-01-01publicationgeorefid:2010-079022doi:10.1126/science.1185435Herbert, Timothy D.Brown University, Department of Geological Sciences, Providence, RI, United StatesauthorPeterson, Laura CleavelandLuther College, United StatesauthorLawrence, Kira T.Lafayette College, United StatesauthorLiu ZhonghuiUniversity of Hong Kong, ChinaauthorAmerican Association for the Advancement of Science, Washington, DC, United StatespublisherdocumentDigitalScience328 (5985)1530-1534Determining the timing and amplitude of tropical sea surface temperature (SST) change is an important part of solving the puzzle of the Plio-Pleistocene ice ages. Alkenone-based tropical SST records from the major ocean basins show coherent glacial-interglacial temperature changes of 1 degrees to 3 degrees C that align with (but slightly lead) global changes in ice volume and deep ocean temperature over the past 3.5 million years. Tropical temperatures became tightly coupled with benthic delta (super 18) O and orbital forcing after 2.7 million years. We interpret the similarity of tropical SST changes, in dynamically dissimilar regions, to reflect "top-down" forcing through the atmosphere. The inception of a strong carbon dioxide-greenhouse gas feedback and amplification of orbital forcing at approximately 2.7 million years ago connected the fate of Northern Hemisphere ice sheets with global ocean temperatures since that time.completedStratigraphyArabian SeaAtlantic Oceancarbon dioxideCenozoicclimate forcingEast PacificEquatorial AtlanticEquatorial Pacificglacial geologyglaciationice sheetsIndian Oceanisotope ratiosisotopesLeg 108Leg 117Leg 138Leg 184Mid-Atlantic RidgeNeogeneNorth PacificNorthern HemisphereNorthwest PacificO-18/O-16Ocean Drilling ProgramODP Site 1146ODP Site 662ODP Site 722ODP Site 846oxygenPacific Oceanpaleo-oceanographypaleoenvironmentpaleotemperaturePlioceneQuaternarysea-surface temperatureSouth AtlanticSouth China SeaSouth PacificSoutheast Pacificstable isotopesTertiarytropical environmentWest Pacificurn:org.iodp:exp:108urnlargerWorkCitationcampaignurn:org.iodp:exp:117urnlargerWorkCitationcampaignurn:org.iodp:exp:138urnlargerWorkCitationcampaignurn:org.iodp:exp:184urnlargerWorkCitationcampaignurn:org.iodp:exp:184:site:1146urnlargerWorkCitationstudyurn:org.iodp:exp:184urnlargerWorkCitationcampaignurn:org.iodp:exp:108:site:662urnlargerWorkCitationstudyurn:org.iodp:exp:108urnlargerWorkCitationcampaignurn:org.iodp:exp:117:site:722urnlargerWorkCitationstudyurn:org.iodp:exp:117urnlargerWorkCitationcampaignurn:org.iodp:exp:138:site:846urnlargerWorkCitationstudyurn:org.iodp:exp:138urnlargerWorkCitationcampaignEnglishgeoscientificInformation-90.4906122.0000-57.000060.0000Arabian SeaMid-Atlantic RidgeSouth China SeaSupplemental information/data is available in the online version of this articleapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www.sciencemag.org/content/328/5985/1530.full.pdfdownload