{"NOAAStudyId":"13280","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":"2012-08-13","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-13280.xml","doi":null,"earliestYearBP":24988,"earliestYearCE":-23038,"entryId":"noaa-ocean-13280","funding":[{"fundingAgency":"Leverhulme Trust","fundingGrant":null},{"fundingAgency":"Royal Society","fundingGrant":null},{"fundingAgency":"Natural Environment Research Council (NERC)","fundingGrant":"NE/E00119X/1"}],"investigators":"McClymont, E.L.; Ganeshram, R.S.; Pichevin, L.; Talbot, H.M.; van Dongen, B.E.; Thunell, R.C.; Haywood, A.M.; Singarayer, J.S.; Valdes, P.J.","mostRecentYearBP":6825,"mostRecentYearCE":-4875,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13280","originalSource":null,"publication":[{"abstract":"Centennial-scale records of sea-surface temperature and opal \r\ncomposition spanning the Last Glacial Maximum and Termination 1 \r\n(circa 25-6 ka) are presented here from Guaymas Basin in the \r\nGulf of California. Through the application of two organic \r\ngeochemistry proxies, the UK37'index and the TEX86H index, \r\nwe present evidence for rapid, stepped changes in temperatures \r\nduring deglaciation. These occur in both temperature proxies \r\nat 13 ka (~3°C increase in 270 years), 10.0 ka (~2°C decrease \r\nover ~250 years) and at 8.2 ka (3°C increase in <200 years). \r\nAn additional rapid warming step is also observed in TEX86H \r\nat 11.5 ka. In comparing the two temperature proxies and opal \r\ncontent, we consider the potential for upwelling intensity \r\nto be recorded and link this millennial-scale variability \r\nto shifting Intertropical Convergence Zone position \r\nand variations in the strength of the Subtropical High. \r\nThe onset of the deglacial warming from 17 to 18 ka is \r\ncomparable to a \"southern hemisphere\" signal, although \r\nthe opal record mimics the ice-rafting events of the north \r\nAtlantic (Heinrich events). Neither the modern seasonal cycle \r\nnor El Niño/Southern Oscillation patterns provide valid \r\nanalogues for the trends we observe in comparison with other \r\nregional records. Fully coupled climate model simulations \r\nconfirm this result, and in combination we question whether \r\nthe seasonal or interannual climate variations of the modern \r\nclimate are valid analogues for the glacial and deglacial \r\ntropical Pacific. \r\n","author":null,"citation":"McClymont, E.L., R.S. Ganeshram, L.E. Pichevin, H.M. Talbot, \r\nB.E. van Dongen, R.C. Thunell, A.M. Haywood, J.S. Singarayer, \r\nand P.J. Valdes. 2012. \r\nSea-surface temperature records of Termination 1 in the Gulf \r\nof California: Challenges for seasonal and interannual analogues \r\nof tropical Pacific climate change. \r\nPaleoceanography, 27, PA2202, doi:10.1029/2011PA002226","edition":null,"identifier":{"id":"10.1029/2011PA002226","type":"doi","url":"http://dx.doi.org/10.1029/2011PA002226"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"Sea-surface temperature records of Termination 1 in the Gulf  of California: Challenges for seasonal and interannual analogues  of tropical Pacific climate change","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Sea Surface Temperature Reconstruction"],"site":[{"NOAASiteId":"53312","geo":{"geoType":"Feature","geometry":{"coordinates":["27.4835","-112.0743"],"type":"POINT"},"properties":{"easternmostLongitude":"-112.0743","maxElevationMeters":"-881","minElevationMeters":"-881","northernmostLatitude":"27.4835","southernmostLatitude":"27.4835","westernmostLongitude":"-112.0743"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean>Gulf Of Mexico","mappable":"Y","paleoData":[{"NOAADataTableId":"23000","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>biomarkers"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcclymont2012/mcclymont2012.txt","linkText":"mcclymont2012.txt","urlDescription":"Original Data and Full Metadata","variables":[{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>organic compound index>alkenone unsaturation index","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature"},{"cvAdditionalInfo":"based on TEX86","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>organic compound index>glycerol dialkyl glycerol tetraether index","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature"},{"cvAdditionalInfo":"UK37 - TEX86","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":"differenced","cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>organic compound index>alkenone unsaturation index","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature"},{"cvAdditionalInfo":"UK37 - TEX86","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":"differenced","cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>organic compound index>glycerol dialkyl glycerol tetraether index","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"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":"dimensionless","cvWhat":"chemical composition>compound>organic compound>organic compound index>alkenone unsaturation index>alkenone unsaturation index Uk37 prime"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>compound>organic compound>organic compound index>tetraether index of 86 carbon atoms"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>compound>organic compound>organic compound index>branched and isoprenoid tetraether index"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"milligram per gram","cvWhat":"chemical composition>compound>organic compound>organic hydroxy compound>glycerol dialkyl glycerol tetraether>branched glycerol dialkyl glycerol tetraether"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>biomarkers","earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcclymont2012/mcclymont2012.xls","linkText":"mcclymont2012.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"MD02-2515","dataTableNotes":null,"earliestYear":24988,"earliestYearBP":24988,"earliestYearCE":-23038,"mostRecentYear":6825,"mostRecentYearBP":6825,"mostRecentYearCE":-4875,"species":[],"timeUnit":"cal yr BP"}],"siteName":"MD02-2515"}],"studyCode":null,"studyName":"Gulf of California Deglacial Biogenic SST Reconstructions","studyNotes":"Sea surface temperature (SST) reconstructions for the Gulf \nof California (GOC) based on two organic geochemical proxies, \nthe UK37'index and the TEX86H index.  Data cover the deglacial \ninterval from roughly 25 - 6 ka. \n\nGiant Calypso core MD02-2515 was collected from Guaymas Basin \nin the central GOC during the 2002 IMAGES-MONA expedition \n\nCore MD02-2515: 27°29.01'N, 112°04.46'W, 881 m water depth. ","version":"1.0","xmlId":"11321"}