{"NOAAStudyId":"8731","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":"2010-01-15","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-8731.xml","doi":null,"earliestYearBP":19010,"earliestYearCE":-17060,"entryId":"noaa-ocean-8731","funding":[],"investigators":"Caissie, B.E.; Brigham-Grette, J.; Lawrence, K.T.; Herbert, T.D.; Cook, M.S.","mostRecentYearBP":367,"mostRecentYearCE":1583,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/8731","originalSource":null,"publication":[{"abstract":"The Bering Sea gateway between the Pacific and Arctic oceans impacts global climate when glacial-interglacial shifts in shore line position and ice coverage change regional albedo. Previous work has shown that during the last glacial termination and into the Holocene, sea level rises and sea ice coverage diminishes from perennial to absent. Yet, existing work has not quantified sea ice duration or sea surface temperatures (SST) during this transition. Here we combine diatom assemblages with the first alkenone record from the Bering Sea to provide a semiquantitative record of sea ice duration, SST, and productivity change since the Last Glacial Maximum (LGM). During the LGM, diatom assemblages indicate that sea ice covered the southeastern Bering Sea perennially. At 15.1 cal ka B.P., the diatom assemblage shifts to one more characteristic of seasonal sea ice and alkenones occur in the sediments in low concentrations. Deglaciation is characterized by laminated intervals with highly productive and diverse diatom assemblages and inferred high coccolithophorid production. At 11.3 cal ka B.P. the diatom assemblage shifts from one dominated by sea ice species to one dominated by a warmer water, North Pacific species. Simultaneously, the SST increases by 3°C and the southeastern Bering Sea becomes ice-free year-round. Productivity and temperature proxies are positively correlated with independently dated records from elsewhere in the Bering Sea, the Sea of Okhotsk, and the North Pacific, indicating that productivity and SST changes are coeval across the region.","author":null,"citation":"Caissie, B.E., J. Brigham-Grette, K.T. Lawrence, T.D. Herbert, and M.S. Cook. 2010. Last Glacial Maximum to Holocene sea surface conditions at Umnak Plateau, Bering Sea, as inferred from diatom, alkenone, and stable isotope records. Paleoceanography, 25, PA1206. doi: 10.1029/2008PA001671.\r\n\r\n","edition":null,"identifier":{"id":"10.1029/2008PA001671","type":"doi","url":"http://dx.doi.org/10.1029/2008PA001671"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":null,"title":"Last Glacial Maximum to Holocene sea surface conditions at Umnak Plateau, Bering Sea, as inferred from diatom, alkenone, and stable isotope records","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"52220","geo":{"geoType":"Feature","geometry":{"coordinates":["54.55315","-168.6692"],"type":"POINT"},"properties":{"easternmostLongitude":"-168.6692","maxElevationMeters":"-1466","minElevationMeters":"-1466","northernmostLatitude":"54.55315","southernmostLatitude":"54.55315","westernmostLongitude":"-168.6692"}},"locationName":"Ocean>Pacific Ocean>North Pacific 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