{"NOAAStudyId":"12888","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":"2012-04-02","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-12888.xml","doi":null,"earliestYearBP":48,"earliestYearCE":1902,"entryId":"noaa-ocean-12888","funding":[],"investigators":"Hetzinger, S.; Halfar, J.; Kronz, A.; Steneck, R.S.; Adey, W.; Lebednik, P.; Schöne, B.R.","mostRecentYearBP":-17,"mostRecentYearCE":1967,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/12888","originalSource":null,"publication":[{"abstract":"We present the first continuous, high-resolution record \r\nof Mg/Ca variations within an encrusting coralline red alga, \r\nClathromorphum nereostratum, from Amchitka Island, Aleutian \r\nIslands. Mg/Ca ratios of individual growth increments were \r\nanalyzed by measuring a single-point, electron-microprobe \r\ntransect, yielding a resolution of ~15 samples/year and a \r\n65-year record (1902-1967) of variations. Results show that \r\nMg/Ca ratios in the high-Mg calcite algal framework display \r\npronounced annual cyclicity and archive late spring-late fall \r\nsea-surface temperatures (SST) corresponding to the main season \r\nof algal growth. Mg/Ca values correlate well to local SST, \r\nas well as to an air temperature record from the same region. \r\nHigh spatial correlation to large-scale SST variability in \r\nthe subarctic North Pacific is observed, with patterns of \r\nstrongest correlation following the direction of major \r\noceanographic features that play a key role in the exchange \r\nof water masses between the North Pacific and the Bering Sea. \r\nOur data correlate well with a shorter Mg/Ca record from \r\na second site, corroborating the ability of the alga to reliably \r\nrecord regional environmental signals. In addition, Mg/Ca ratios \r\nrelate well to a 29-year d18O time series measured on the same \r\nsample, providing additional support for the use of Mg in \r\ncoralline red algae as a paleotemperature proxy that, unlike \r\nalgal-d18O, is not influenced by salinity fluctuations. \r\nMoreover, electron microprobe-based analysis enables higher \r\nsampling resolution and faster analysis, thus providing \r\na promising approach for future studies of longer \r\nC. nereostratum records and applications to other \r\ncoralline species. ","author":null,"citation":"Hetzinger, S., J. Halfar, A. Kronz, R.S. Steneck, W. Adey, \r\nP.A. Lebednik, and B.R. Schöne. 2009. \r\nHigh-Resolution Mg/Ca Ratios in a Coralline Red Alga as a Proxy \r\nfor Bering Sea Temperature variations from 1902 to 1967. \r\nPalaios, June 2009, Vol. 24, no. 6, pp. 406-412. \r\ndoi: 10.2110/palo.2008.p08-116r \r\nhttp://palaios.geoscienceworld.org/content/24/6/406.abstract","edition":null,"identifier":{"id":"10.2110/palo.2008.p08-116r","type":"doi","url":"http://dx.doi.org/10.2110/palo.2008.p08-116r"},"issue":null,"journal":"Palaios","pages":null,"pubRank":"1","pubYear":2009,"reportNumber":null,"title":"High-Resolution Mg/Ca Ratios in a Coralline Red Alga as a Proxy  for Bering Sea Temperature variations from 1902 to 1967","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["PAGES Ocean 2k","PAGES 2k Network"],"site":[{"NOAASiteId":"53023","geo":{"geoType":"Feature","geometry":{"coordinates":["51.4156","179.2996"],"type":"POINT"},"properties":{"easternmostLongitude":"179.2996","maxElevationMeters":"-25","minElevationMeters":"-25","northernmostLatitude":"51.4156","southernmostLatitude":"51.4156","westernmostLongitude":"179.2996"}},"locationName":"Continent>North America>United States Of America>Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"21224","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hetzinger2009/hetzinger2009.txt","linkText":"hetzinger2009.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":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"coralline red algae species","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum nereostratum","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hetzinger2009/hetzinger2009.xls","linkText":"hetzinger2009.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"AM-KR-80 8-69-14B","dataTableNotes":null,"earliestYear":1902,"earliestYearBP":48,"earliestYearCE":1902,"mostRecentYear":1967,"mostRecentYearBP":-17,"mostRecentYearCE":1967,"species":[],"timeUnit":"AD"}],"siteName":"Kirlof Point, Amchitka Island"}],"studyCode":null,"studyName":"Amchitka Island Alaska 65 Year Corraline Algae Mg/Ca Data ","studyNotes":"65 year Mg/Ca data from coralline alga collected near Amchitka Island, \nAleutian Islands, Alaska. C. nereostratum is a long-lived, shallow-marine \ncrustose coralline algae.\n\nSpecimen AM-KR-80 8-69-14B \ncollected in August 1969, 25 water depth, \ncoralline algae, species: Clathromorphum nereostratum\n\nSampling location: \nKirlof Point, Amchitka Island, Alaska, 51°24.936'N, 179°17.976'E. ","version":"1.0","xmlId":"10952"}