{"NOAAStudyId":"14113","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":"2013-03-18","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-14113.xml","doi":null,"earliestYearBP":17500,"earliestYearCE":-15550,"entryId":"noaa-ocean-14113","funding":[{"fundingAgency":"National Science Foundation Geophysics","fundingGrant":"EAR-0711584"},{"fundingAgency":"National Science Foundation Paleoclimate","fundingGrant":"ATM-0602395"},{"fundingAgency":"National Science Foundation Ocean Drilling","fundingGrant":"OCE-0242084 and OCE-0351096"}],"investigators":"Davies, M.H.; Mix, A.C.; Stoner, J.S.","mostRecentYearBP":200,"mostRecentYearCE":1750,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/14113","originalSource":null,"publication":[{"abstract":"Oxygen isotope data from planktonic and benthic foraminifera, on a high-resolution age model (44 14C dates spanning 17,400 years), document deglacial environmental change on the southeast Alaska margin (59°33.32′N, 144°9.21′W, 682 m water depth). Surface freshening (i.e., δ18O reduction of 0.8‰) began at 16,650 ± 170 cal years B.P. during an interval of ice proximal sedimentation, likely due to freshwater input from melting glaciers. A sharp transition to laminated hemipelagic sediments constrains retreat of regional outlet glaciers onto land circa 14,790 ± 380 cal years B.P. Abrupt warming and/or freshening of the surface ocean (i.e., additional δ18O reduction of 0.9‰) coincides with the Bølling Interstade of northern Europe and Greenland. Cooling and/or higher salinities returned during the Allerød interval, coincident with the Antarctic Cold Reversal, and continue until 11,740 ± 200 cal years B.P., when onset of warming coincides with the end of the Younger Dryas. An abrupt 1‰ reduction in benthic δ18O at 14,250 ± 290 cal years B.P. likely reflects a decrease in bottom water salinity driven by deep mixing of glacial meltwater, a regional megaflood event, or brine formation associated with sea ice. Two laminated opal-rich intervals record discrete episodes of high productivity during the last deglaciation. These events, precisely dated here at 14,790 ± 380 to 12,990 ± 190 cal years B.P. and 11,160 ± 130 to 10,750 ± 220 cal years B.P., likely correlate to similar features observed elsewhere on the margins of the North Pacific and are coeval with episodes of rapid sea level rise. Remobilization of iron from newly inundated continental shelves may have helped to fuel these episodes of elevated primary productivity and sedimentary anoxia.","author":null,"citation":"Davies, M.H., A.C. Mix, J.S. Stoner, J.A. Addison, J. Jaeger, B. Finney, and J. Wiest. 2011. The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia. Paleoceanography, 26, PA2223. doi:10.1029/2010PA002051.","edition":null,"identifier":{"id":"10.1029/2010PA002051","type":"doi","url":"http://dx.doi.org/10.1029/2010PA002051"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2011,"reportNumber":null,"title":"The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Younger Dryas"],"site":[{"NOAASiteId":"53252","geo":{"geoType":"Feature","geometry":{"coordinates":["59.555","-144.1535"],"type":"POINT"},"properties":{"easternmostLongitude":"-144.1535","maxElevationMeters":"-682","minElevationMeters":"-682","northernmostLatitude":"59.555","southernmostLatitude":"59.555","westernmostLongitude":"-144.1535"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean>Gulf Of Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"23800","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/davies2011/davies2011-nonion.txt","linkText":"davies2011-nonion.txt","urlDescription":"Original Data and Full Metadata","variables":[{"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":"Nonionella sp. >150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":"Nonionella sp. >150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"EW0408-85JC_Nonionella.sp","dataTableNotes":null,"earliestYear":14200,"earliestYearBP":14200,"earliestYearCE":-12250,"mostRecentYear":11200,"mostRecentYearBP":11200,"mostRecentYearCE":-9250,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"23801","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/davies2011/davies2011-uvig.txt","linkText":"davies2011-uvig.txt","urlDescription":"Original Data and Full Metadata","variables":[{"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":">150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer>calcareous benthic foraminifer>Uvigerina sp.>Uvigerina peregrina","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":">150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer>calcareous benthic foraminifer>Uvigerina sp.>Uvigerina peregrina","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"EW0408-85JC_U.peregrina","dataTableNotes":null,"earliestYear":17500,"earliestYearBP":17500,"earliestYearCE":-15550,"mostRecentYear":200,"mostRecentYearBP":200,"mostRecentYearCE":1750,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"23802","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>carbon isotopes","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/davies2011/davies2011-plank.txt","linkText":"davies2011-plank.txt","urlDescription":"Original Data and Full Metadata","variables":[{"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":">150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Neogloboquadrina sp.>Neogloboquadrina pachyderma>Neogloboquadrina pachyderma sinistral","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":">150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Neogloboquadrina sp.>Neogloboquadrina pachyderma>Neogloboquadrina pachyderma sinistral","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":">150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globigerina sp.>Globigerina bulloides","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":">150 ¼_x0003_m","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globigerina sp.>Globigerina bulloides","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"EW0408-85JC_planktonic","dataTableNotes":null,"earliestYear":17500,"earliestYearBP":17500,"earliestYearCE":-15550,"mostRecentYear":200,"mostRecentYearBP":200,"mostRecentYearCE":1750,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"23803","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/davies2011/davies2011-wuell.txt","linkText":"davies2011-wuell.txt","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"EW0408-85JC_C.wuellerstorfi","dataTableNotes":null,"earliestYear":14100,"earliestYearBP":14100,"earliestYearCE":-12150,"mostRecentYear":10500,"mostRecentYearBP":10500,"mostRecentYearCE":-8550,"species":[],"timeUnit":"cal yr BP"}],"siteName":"EW0408-85JC"}],"studyCode":null,"studyName":"Gulf of Alaska 17,000 Year Isotope Data","studyNotes":"Calibrated foraminiferal radiocarbon dates and stable isotope data from N. pachyderma, G. bulloides, U. peregrina, C. wuellerstorfi, and Nonionella sp. at sub-centennial resolution through the Holocene and most recent glacial termination in the Gulf of Alaska. The depth in core is in cmbsf (equivalent to jumbo core depths + 150 cm). To allow direct comparison to U. peregrina, empirical species corrections of +0.64‰ and +0.1‰ were applied to the δ18O values of C. wuellerstorfi and Nonionella sp., respectively. Similarly, an empirical species correction of −0.2‰ was applied to the δ13C values of C. wuellerstorfi.","version":"1.0","xmlId":"12095"}