{"NOAAStudyId":"12257","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2011-10-18","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-12257.xml","doi":null,"earliestYearBP":19980,"earliestYearCE":-18030,"entryId":"noaa-ocean-12257","funding":[{"fundingAgency":"US NOAA","fundingGrant":"Global Change  Postdoctoral Fellowship"},{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-0823498,  OCE-0648258, OCE-0096472"}],"investigators":"Schmidt, M.W.; Lynch-Stieglitz, J.","mostRecentYearBP":640,"mostRecentYearCE":1310,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/12257","originalSource":null,"publication":[{"abstract":"The prevailing paradigm of abrupt climate change holds that \r\nrapid shifts associated with the most extreme climate swings \r\nof the last glacial cycle were forced by changes in the strength \r\nand northward extension of Atlantic Meridional Overturning \r\nCirculation (AMOC), resulting in an abrupt reorganization \r\nof atmospheric circulation patterns with global teleconnections. \r\nTo determine the timing of tropical Atlantic atmospheric \r\ncirculation changes over the past 21 ka BP, we reconstruct \r\nhigh resolution sea surface temperature and d18OSW (a proxy \r\nfor surface salinity) records based on Mg/Ca ratios and oxygen \r\nisotope measurements in the planktonic foraminifera \r\nGlobigerinoides ruber from a sediment core located on the \r\nwestern margin of the Florida Straits. As a proxy for meltwater \r\ndischarge influence on Florida Straits surface water salinity, \r\nwe also measured Ba/Ca ratios in G. ruber from the same core. \r\nResults show that riverine influence on Florida Straits surface \r\nwater started by 17.2 ka BP and ended by 13.6 ka BP, 600 years \r\nbefore the start of the Younger Dryas (YD) cold interval. \r\nThe initiation of the YD is marked by an abrupt increase \r\nin Florida Straits d18OSW values, indicating a shift to \r\nelevated sea surface salinity occurring in 130 years, \r\nmost likely resulting from increased regional aridity \r\nand/or reduced precipitation. In order to resolve the timing \r\nof tropical atmospheric circulation change relative to AMOC \r\nvariability across this transition, we compare the timing \r\nof surface water changes to a recently published record \r\nof Florida Current variability in the same core reconstructed \r\nfrom benthic oxygen isotope measurements. We find synchronous \r\nchanges in atmospheric and ocean circulation on the transition \r\ninto the YD, consistent with an abrupt reduction in AMOC as \r\nthe driver of tropical Atlantic atmospheric circulation change \r\nat this time. \r\n\r\n","author":null,"citation":"Schmidt, M.W. and J. Lynch-Stieglitz. 2011. \r\nFlorida Straits deglacial temperature and salinity change: \r\nImplications for tropical hydrologic cycle variability \r\nduring the Younger Dryas. \r\nPaleoceanography, 26, PA4205, doi:10.1029/2011PA002157.","edition":null,"identifier":{"id":"10.1029/2011PA002157","type":"doi","url":"http://dx.doi.org/10.1029/2011PA002157"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2011,"reportNumber":null,"title":"Florida Straits deglacial temperature and salinity change:  Implications for tropical hydrologic cycle variability  during the Younger Dryas","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Meridional Overturning Circulation (MOC)","Younger Dryas","Sea Surface Temperature Reconstruction","Other Hydroclimate Reconstruction"],"site":[{"NOAASiteId":"52444","geo":{"geoType":"Feature","geometry":{"coordinates":["24.326833","-83.252333"],"type":"POINT"},"properties":{"easternmostLongitude":"-83.252333","maxElevationMeters":"-546","minElevationMeters":"-546","northernmostLatitude":"24.326833","southernmostLatitude":"24.326833","westernmostLongitude":"-83.252333"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean>Gulf Of Mexico","mappable":"Y","paleoData":[{"NOAADataTableId":"20598","coreLengthMeters":8,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schmidt2011/schmidt2011.txt","linkText":"schmidt2011.txt","urlDescription":"Original Data and Full Metadata","variables":[{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>element or compound ratio>magnesium/calcium","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature"},{"cvAdditionalInfo":"ice volume correction","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":"corrected","cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>isotope ratio>delta 18O","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil SMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"ice volume correction","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":"corrected","cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>element or compound ratio>magnesium/calcium","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil SMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"ice volume correction","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":"corrected","cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>sea water","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil SMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globigerinoides sp.>Globigerinoides ruber","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globigerinoides sp.>Globigerinoides ruber","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globigerinoides sp.>Globigerinoides ruber","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimole per mole","cvWhat":"chemical composition>element or compound ratio>barium/calcium"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schmidt2011/schmidt2011.xls","linkText":"schmidt2011.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"26JPC2011","dataTableNotes":null,"earliestYear":19980,"earliestYearBP":19980,"earliestYearCE":-18030,"mostRecentYear":640,"mostRecentYearBP":640,"mostRecentYearCE":1310,"species":[],"timeUnit":"cal yr BP"}],"siteName":"KNR166-2-26JPC"}],"studyCode":null,"studyName":"Florida Straits 20KYr Mg/Ca SST and d18Osw Reconstructions ","studyNotes":"To determine the timing of tropical Atlantic atmospheric \ncirculation changes over the past 20 ka BP, we reconstruct \nhigh resolution sea surface temperature and d18OSW (a proxy \nfor surface salinity) records based on Mg/Ca ratios and \noxygen isotope measurements in the planktonic foraminifera \nGlobigerinoides ruber from a sediment core located on the \nwestern margin of the Florida Straits. As a proxy for meltwater \ndischarge influence on Florida Straits surface water salinity, \nwe also measured Ba/Ca ratios in G. ruber from the same core. \nThe age model for this core is based on calibrated radiocarbon \ndates from G. ruber and G. sacculifer. \n\n","version":"1.0","xmlId":"10319"}