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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":"Nürnberg, C.C.; Bohrmann, G.; Schlüter, M.; Frank, M.","investigatorDetails":[{"firstName":"Christine","lastName":"Nürnberg","initials":"C.C.","orcId":null},{"firstName":"Gerhard","lastName":"Bohrmann","initials":"G.","orcId":"0000-0001-9976-4948"},{"firstName":"Michael","lastName":"Schlüter","initials":"M.","orcId":null},{"firstName":"Martin","lastName":"Frank","initials":"M.","orcId":"0000-0002-8606-4421"}],"version":"1.0","funding":[],"studyNotes":null,"onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/2653","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-2653.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-ocean-2653.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/paleoceanography","studyCode":null,"scienceKeywords":null,"reconstruction":"N","contributionDate":"1997-07-01","entryId":"noaa-ocean-2653","earliestYearBP":309937,"mostRecentYearBP":0,"earliestYearCE":-307987,"mostRecentYearCE":1950,"publication":[{"author":{"name":"Nürnberg, C.C., G. Bohrmann, M. Schlüter, and M. Frank"},"pubYear":1997,"title":"Barium accumulation in the Atlantic sector of the Southern Ocean: Results From 190,000-year records","journal":"Paleoceanography","volume":"12","edition":null,"issue":"4","pages":"594-603","reportNumber":null,"citation":"Nürnberg, C.C., G. Bohrmann, M. Schlüter, and M. Frank. 1997. Barium accumulation in the Atlantic sector of the Southern Ocean: Results From 190,000-year records. Paleoceanography, 12(4), 594-603. doi: 10.1029/97PA01130","type":"publication","identifier":{"type":"doi","id":"10.1029/97PA01130","url":"http://dx.doi.org/10.1029/97PA01130"},"abstract":"Extensive investigations of sedimentary barium were performed in the southern South Atlantic in order to assess the reliability of the barium signal in Antarctic sediments as a proxy for paleoproductivity. Maximum accumulation rates of excess barium were calculated for the Antarctic zone south of the polar front where silica accumulates at high rates. The correspondence between barium and opal supports the applicability of barium as a proxy for productivity. Within the Antarctic zone north of today's average sea ice maximum, interglacial vertical rain rates of excess barium are high, with a maximum occurring during the last deglaciation and early Holocene and during oxygen isotope chronozone 5.5. During these periods, the maximum silica accumulation was supposedly located south of the polar front. Glacial paleoproductivity, instead, was low within the Antarctic zone. North of the polar front, significantly higher barium accumulation occurs during glacial times. The vertical rain rates, however, are as high as in the glacial Antarctic zone. 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