{"xmlId":"74054","NOAAStudyId":"32374","studyName":"Bay of Bengal U1446 Benthic and Leaf Wax Isotopes during the Last 640 kyr","doi":"https://doi.org/10.25921/gxem-9c71","uuid":"11b0c9fa-429a-4745-affa-83ed5f7665bc","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"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."},"dataType":"PALEOCEANOGRAPHY","investigators":"McGrath, S.M.; Clemens, S.C.; Huang, Y.; Yamamoto, M.","investigatorDetails":[{"firstName":"Sarah","lastName":"McGrath","initials":"S.M.","orcId":"0000-0003-3372-1894"},{"firstName":"Steven","lastName":"Clemens","initials":"S.C.","orcId":"0000-0002-1136-7815"},{"firstName":"Yongsong","lastName":"Huang","initials":"Y.","orcId":"0000-0002-9287-4543"},{"firstName":"Masanobu","lastName":"Yamamoto","initials":"M.","orcId":"0000-0003-1312-825X"}],"version":"1.0","funding":[],"studyNotes":null,"onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/32374","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-32374.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-ocean-32374.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/paleoceanography","studyCode":null,"scienceKeywords":["Other Reconstruction"],"reconstruction":"Y","contributionDate":"2021-01-19","entryId":"noaa-ocean-32374","earliestYearBP":641740,"mostRecentYearBP":288,"earliestYearCE":-639790,"mostRecentYearCE":1662,"publication":[{"author":{"name":"McGrath, S.M., S.C. Clemens, Y. Haung, and M. Yamamoto"},"pubYear":2021,"title":"Greenhouse Gas and Ice Volume Drive Pleistocene Indian Summer Monsoon Precipitation Isotope Variability","journal":"Geophysical Research Letters","volume":"48","edition":null,"issue":null,"pages":null,"reportNumber":"e2020GL092249","citation":"McGrath, S.M., S.C. Clemens, Y. Haung, and M. Yamamoto. 2021. Greenhouse Gas and Ice Volume Drive Pleistocene Indian Summer Monsoon Precipitation Isotope Variability. Geophysical Research Letters, 48, e2020GL092249. doi: 10.1029/2020GL092249","type":"publication","identifier":{"type":"doi","id":"10.1029/2020GL092249","url":"http://dx.doi.org/10.1029/2020GL092249"},"abstract":"Orbital-scale Indian Summer Monsoon variability is often interpreted as a direct response to northern hemisphere summer insolation. Here we present a continuous (0-640 kyr) orbital scale precipitation isotope (dDprecip) record using leaf wax dD from the core monsoon zone of India. The dDprecip record is quantitatively coherent with, and dDprecip minima in phase with, greenhouses gas maxima, and ice volume minima across all orbital bands. The dDprecip record is also coherent and in phase with the two existing orbital-scale Indian speleothem d18O records, demonstrating a consistent regional response among independent proxies. These findings preclude interpretation of Indian precipitation isotope records as a direct response to northern hemisphere summer insolation. Rather, they dominantly reflect changes in moisture source and transport paths associated with changes in greenhouse gases and ice volume. The orbital-scale precipitation isotope responses of the Indian and East Asian monsoon systems are uncoupled and are driven by different forcings.","pubRank":"1"}],"site":[{"NOAASiteId":"58697","siteName":"IODP U1446","siteCode":null,"mappable":"Y","locationName":"Ocean>Indian Ocean","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["19.083","85.733"]},"properties":{"southernmostLatitude":"19.083","northernmostLatitude":"19.083","westernmostLongitude":"85.733","easternmostLongitude":"85.733","minElevationMeters":"-1440","maxElevationMeters":"-1440"}},"paleoData":[{"dataTableName":"U1446 Benthic d18O McGrath2021","NOAADataTableId":"44978","earliestYear":641740,"mostRecentYear":320,"timeUnit":"cal yr BP","earliestYearBP":641740,"mostRecentYearBP":320,"earliestYearCE":-639790,"mostRecentYearCE":1630,"coreLengthMeters":null,"dataTableNotes":null,"species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/mcgrath2021/mcgrath2021-u1446-d18o.txt","urlDescription":"NOAA Template File","linkText":"U1446 Benthic d18O Data","variables":[{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"sampling metadata>sample identification","cvMaterial":null,"cvError":null,"cvUnit":null,"cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Site Name","cvFormat":"Character","cvShortName":"Site"},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"sampling metadata>sample identification","cvMaterial":null,"cvError":null,"cvUnit":null,"cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Hole","cvFormat":"Character","cvShortName":"Hole"},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"sampling metadata>sample identification","cvMaterial":null,"cvError":null,"cvUnit":null,"cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Core type","cvFormat":"Character","cvShortName":"CT"},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"sampling metadata>sample identification","cvMaterial":null,"cvError":null,"cvUnit":null,"cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Core Number","cvFormat":"Numeric","cvShortName":"Core"},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"sampling metadata>sample identification","cvMaterial":null,"cvError":null,"cvUnit":null,"cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Section number","cvFormat":"Numeric","cvShortName":"Section"},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>centimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Mid-depth of sample within section","cvFormat":"Numeric","cvShortName":"Depth_cm"},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>meter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Core depth below sea floor; 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