{"NOAAStudyId":"18897","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":"2015-06-18","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-18897.xml","doi":null,"earliestYearBP":55004,"earliestYearCE":-53054,"entryId":"noaa-ocean-18897","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-1258991"}],"investigators":"Gibson, K.A.; Thunell, R.C.; Tappa, E.J.; Peterson, L.C.; McConnell, M.","mostRecentYearBP":35001,"mostRecentYearCE":-33051,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/18897","originalSource":null,"publication":[{"abstract":"Understanding changes to the marine nitrogen cycle on millennial and shorter time scales can help determine the influence of rapid climate change on the fixed N pool and its sources and sinks. Rapid changes in denitrification have been observed in the eastern tropical North Pacific (ETNP) and Arabian Sea; however, millennial scale d15N records in regions influenced by N2 fixation are sparse. We present a sedimentary d15N record from the Cariaco Basin during marine isotope stage (MIS) 3 (~35-55 ka). The d15N record displays a pattern of millennial scale variability that tracks the Greenland ice core Dansgaard-Oeschger cycles, with higher values observed during interstadial periods, lower values during stadial periods, and abrupt transitions in between. Conditions during interstadials are similar to those at present in the Cariaco Basin, with the sedimentary d15N signal reflecting a combination of local processes and an imported regional signal. If interpreted to reflect regional processes, the interstadial d15N values (average ~5.1 per mil) support the argument that N2 fixation did not increase in the tropical North Atlantic during the last glacial. The lower d15N values during stadials, when lower sea level resulted in increased physical isolation of the basin, can be explained primarily by local processes. In spite of the importance of local processes, striking similarity is observed between the Cariaco record and millennial scale d15N records from the ETNP and Arabian Sea. The apparent synchronicity of changes observed in all three regions suggests an atmospheric teleconnection between the three sites and high-latitude climate forcing during MIS 3.","author":{"name":"Kelly Ann Gibson, Robert C. Thunell, Eric J. Tappa, Larry C. Peterson, Martha McConnell"},"citation":"Kelly Ann Gibson, Robert C. Thunell, Eric J. Tappa, Larry C. Peterson, Martha McConnell. 2015. The influence of rapid, millennial scale climate change on nitrogen isotope dynamics of the Cariaco Basin during marine isotope stage 3. Paleoceanography, 30(3), 253-268. doi: 10.1002/2014PA002684","edition":null,"identifier":{"id":"10.1002/2014PA002684","type":"doi","url":"http://dx.doi.org/10.1002/2014PA002684"},"issue":"3","journal":"Paleoceanography","pages":"253-268","pubRank":"1","pubYear":2015,"reportNumber":null,"title":"The influence of rapid, millennial scale climate change on nitrogen isotope dynamics of the Cariaco Basin during marine isotope stage 3","type":"publication","volume":"30"}],"reconstruction":"Y","scienceKeywords":null,"site":[{"NOAASiteId":"55029","geo":{"geoType":"Feature","geometry":{"coordinates":["10.67817","-64.9715"],"type":"POINT"},"properties":{"easternmostLongitude":"-64.9715","maxElevationMeters":"-847","minElevationMeters":"-847","northernmostLatitude":"10.67817","southernmostLatitude":"10.67817","westernmostLongitude":"-64.9715"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"29297","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/gibson2015/gibson2015mo-fe.txt","linkText":"Cariaco Basin MD03-2621 Mo, Fe","urlDescription":"Data File","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":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":"geological material>bulk geological material>sediment","cvMethod":"energy-dispersive x-ray fluorescence spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>iron"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"energy-dispersive x-ray fluorescence spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>molybdenum"}]}],"dataTableName":"Gibson2015Mo-Fe","dataTableNotes":null,"earliestYear":55004,"earliestYearBP":55004,"earliestYearCE":-53054,"mostRecentYear":35001,"mostRecentYearBP":35001,"mostRecentYearCE":-33051,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"29298","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth 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analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>carbon>organic carbon"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>nitrogen"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 15N"}]}],"dataTableName":"Gibson2015d15N-TOC","dataTableNotes":null,"earliestYear":52935,"earliestYearBP":52935,"earliestYearCE":-50985,"mostRecentYear":35105,"mostRecentYearBP":35105,"mostRecentYearCE":-33155,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"29299","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/gibson2015/gibson2015mg-ca-sst.txt","linkText":"Cariaco Basin MD03-2621 Mg/Ca SST","urlDescription":"Data File","variables":[{"cvAdditionalInfo":"using G. ruber","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":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 year 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":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"millimole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"}]}],"dataTableName":"Gibson2015MgCaSST","dataTableNotes":null,"earliestYear":52986,"earliestYearBP":52986,"earliestYearCE":-51036,"mostRecentYear":35152,"mostRecentYearBP":35152,"mostRecentYearCE":-33202,"species":[],"timeUnit":"cal yr BP"}],"siteName":"MD03-2621"}],"studyCode":null,"studyName":"Cariaco Basin, 35-55 ka Bulk Sediment and Foraminiferal Geochemistry","studyNotes":"This data set contains bulk sediment (%TOC, %N, d15N, scanning XRF) and foraminferal geochemistry (Mg/Ca) used to reconstruct millennial-scale nutrient cycle dynamics in the Cariaco Basin during MIS 3.","version":"1.0","xmlId":"16581"}