georefid:2008-004529SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1098/rstb.1995.0067<gco:CharacterString>Surface and deep hydrology of the northern Atlantic Ocean during the past 150,000 years</gco:CharacterString>1995-01-01publicationgeorefid:2008-004529doi:10.1098/rstb.1995.0067Labeyrie, L.Centres des Faibles Radioactivites, Gif-sur-Yvette, FranceauthorVidal, L.Universite Paris-Sud Orsay, FranceauthorCortijo, E.Universite Bordeaux I, FranceauthorPaterne, M.NIOZ, NetherlandsauthorArnold, M.authorDuplessy, J. C.authorVautravers, M.authorLabracherie, M.authorDuprat, J.authorTuron, J. L.authorGrousset, F.authorvan Weering, T.authorRoyal Society of London, London, United KingdompublisherdocumentHardcopyIn: Eglinton, Geoffrey (editor), Elderfield, Harry (editor), Whitfield, Michael (editor), Williams, Peter J. Le B. (editor), The role of the North Atlantic in the global carbon cycle348 (1324)255-264The abrupt shifts in foraminiferal delta (super 18) O observed in core ODP 609 (the meltwater signature of the Heinrich events, see Bond et al. 1992b, 1993) are seen in ten North Atlantic high sedimentation rate cores; the decreasing south-west to north-east gradient is well pronounced. This confirms that the Heinrich events are associated with major surges of the Laurentide ice sheet, when it is believed approximately 10 (super 6) km (super 3) of ice are liberated during each event. A tentative reconstruction of the changes in surface and deep-water density, based upon the study of cores SU 90-39 (53 degrees N 22 degrees W) and SU 90-08 (43 degrees N 30 degrees W), is presented. To calculate the density of surface water, sea surface temperature is obtained using a foraminiferal transfer function (see CLIMAP 1981) and salinity is estimated using the foraminiferal delta (super 18) O record corrected for the temperature effect on isotopic fractionation. The density of deep water is directly derived from the benthic delta (super 18) O record, after corrections for the mean global changes in Ocean delta (super 18) O. Results indicate that the North Atlantic Ocean has been repetitively a potential area of deep-water formation during the last glacial period.completedQuaternary geologyIsotope geochemistryAtlantic OceanCenozoicchemostratigraphychronostratigraphycorescorrelationDeep Sea Drilling ProjectdeglaciationDSDP Site 609ForaminiferageochemistryHeinrich eventsHoloceneInvertebrataIPODisotope ratiosisotopesLeg 94marine sedimentsmeltwatermicrofossilsNorth AtlanticO-18/O-16oxygenpaleo-oceanographypaleotemperaturePleistoceneProtistaQuaternaryreconstructionsalinitysea-surface temperaturesedimentsspatial variationsstable isotopestemporal distributionupper Pleistoceneupper Quaternaryurn:org.iodp:exp:94urnlargerWorkCitationcampaignurn:org.iodp:exp:94:site:609urnlargerWorkCitationstudyurn:org.iodp:exp:94urnlargerWorkCitationcampaignEnglishgeoscientificInformation-24.1418-24.141749.524049.5241