georefid:2012-050604SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1016/j.quascirev.2010.08.013<gco:CharacterString>Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation</gco:CharacterString>2010-01-01publicationgeorefid:2012-050604doi:10.1016/j.quascirev.2010.08.013Benway, Heather M.Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United StatesauthorMcManus, Jerry F.Lamont-Doherty Earth Observatory, United StatesauthorOppo, Delia W.Salem State College, United StatesauthorCullen, James L.authorElsevier, InternationalpublisherdocumentHardcopyQuaternary Science Reviews29 (23-24)3336-3345Millennial-scale climate fluctuations of the last deglaciation have been tied to abrupt changes in the Atlantic Meridional Overturning Circulation (MOC). A key to understanding mechanisms of MOC collapse and recovery is the documentation of upper ocean hydrographic changes in the vicinity of North Atlantic deep convection sites. Here we present new high-resolution ocean temperature and delta (super 18) O (sub sw) records spanning the last deglaciation from an eastern subpolar North Atlantic site that lies along the flow path of the North Atlantic Current, approaching deep convection sites in the Labrador and Greenland-Iceland-Norwegian (GIN) Seas. High-resolution temperature and delta (super 18) O (sub sw) records from subpolar Site 980 help track the movement of the subpolar/subtropical front associated with temperature and Atlantic MOC changes throughout the last deglaciation. Distinct delta (super 18) O (sub sw) minima during Heinrich 1 (H1) and the Younger Dryas (YD) correspond with peaks in ice-rafted debris and periods of reduced Atlantic MOC, indicating the presence of melt water in this region that could have contributed to MOC reductions during these intervals. Increased tropical and subtropical delta (super 18) O (sub sw) during these periods of apparent freshening in the subpolar North Atlantic suggest a buildup of salt at low latitudes that served as a negative feedback on reduced Atlantic MOC. Abstract Copyright (2010) Elsevier, B.V.completedQuaternary geologyabsolute agealkaline earth metalsAtlantic Meridional Overturning CirculationAtlantic OceanC-14calciumcarbonCenozoicdeglaciationerrorsForaminiferaGlobigerinaceaHeinrich eventsHoloceneInvertebrataisotope ratiosisotopesLeg 162magnesiummarine environmentmetalsMg/CamicrofossilsNeogloboquadrinaNeogloboquadrina pachydermaNorth AtlanticO-18/O-16Ocean Drilling ProgramODP Site 980oxygenpaleo-oceanographypaleoclimatologypaleoenvironmentpaleotemperaturePleistoceneProtistaQuaternaryradioactive isotopesRockall BankRotaliinasea-level changesstable isotopesupper Pleistoceneupper WeichselianWeichselianYounger Dryasurn:org.iodp:exp:162urnlargerWorkCitationcampaignurn:org.iodp:exp:162:site:980urnlargerWorkCitationstudyurn:org.iodp:exp:162urnlargerWorkCitationcampaignEnglishgeoscientificInformation-14.4208-14.420855.290655.2906