{"NOAAStudyId":"10513","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":"2011-01-26","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-10513.xml","doi":null,"earliestYearBP":10,"earliestYearCE":1940,"entryId":"noaa-ocean-10513","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-07-52649"},{"fundingAgency":"US NOAA","fundingGrant":"NA07OAR4310060 , NAOAR4320912"}],"investigators":"Arbuszewski, J.A.; deMenocal, P.B.; Kaplan, A.; Farmer, E.C.","mostRecentYearBP":-10,"mostRecentYearCE":1960,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10513","originalSource":null,"publication":[{"abstract":"Paired foraminiferal Magnesium/Calcium ratio and oxygen isotope \nanalyses are widely used to estimate surface ocean d18Oseawater, \na robust proxy for surface salinity.  We assess the fidelity of \nshell-derived d18Oseawater estimates for the surface-dwelling \nforaminifer Globigerinoides ruber (white) using an Atlantic \nmeridional coretop transect spanning basin-scale temperature \nand salinity gradients. Shell-derived and observed d18Oseawater \nvalues are well correlated (r2=0.77), but a large systematic bias \nis observed. Shell Mg/Ca ratios are significantly elevated above \nvalues expected from observed and isotopic calcification \ntemperatures in the saline subtropical gyres of both hemispheres. \nThis temperature-independent shell Mg/Ca ratio variability, \ntermed \"excess Mg/Ca\", is highly correlated with surface salinity \n(r2=0.77), and the observed salinity dependence (27±4%) is much \nhigher than indicated by culture studies (6±2%). Our coretop data \nare used to develop new Atlantic Basin temperature and salinity \ncalibration equations that are accurate (±1.1°C and ±0.20, \nrespectively), precise (r2=0.82 and 0.81, respectively), \nand verifiable using previously published data. These results \nare valid for the relatively high salinities of the subtropical \nAtlantic (35.5-37.3). We discover that inclusion of other published \ndata from lower salinity regions (< 35) indicates little or no \nexcess Mg/Ca. Taken together, these results point to a strongly \nnon-linear, positive salinity effect on shell Mg/Ca ratios that \nsignificantly affects the accuracy of SST and d18Oseawater \nestimates in high salinity settings (>35). \n","author":null,"citation":"Arbuszewski, J., P. deMenocal, A. Kaplan, and E.C. Farmer. 2010. \nOn the fidelity of shell-derived d18Oseawater estimates. \nEarth and Planetary Science Letters, Vol. 300, Issues 3-4, \npp. 185-196, 1 December 2010. \ndoi:10.1016/j.epsl.2010.10.035 \n","edition":null,"identifier":{"id":"10.1016/j.epsl.2010.10.035","type":"doi","url":"http://dx.doi.org/10.1016/j.epsl.2010.10.035"},"issue":null,"journal":"Earth and Planetary Science Letters","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":null,"title":"On the fidelity of shell-derived d18Oseawater estimates","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"37164","geo":{"geoType":"Feature","geometry":{"coordinates":["42.85","-25.15"],"type":"POINT"},"properties":{"easternmostLongitude":"-25.15","maxElevationMeters":"-3448","minElevationMeters":"-3448","northernmostLatitude":"42.85","southernmostLatitude":"42.85","westernmostLongitude":"-25.15"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"19311","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/arbuszewski2010/arbuszewski2010.txt","linkText":"arbuszewski2010.txt","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/arbuszewski2010/arbuszewski2010.xls","linkText":"arbuszewski2010.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"VM29-178","dataTableNotes":null,"earliestYear":10,"earliestYearBP":10,"earliestYearCE":1940,"mostRecentYear":-10,"mostRecentYearBP":-10,"mostRecentYearCE":1960,"species":[],"timeUnit":"cal yr BP"}],"siteName":"VM29-178"}],"studyCode":null,"studyName":"Atlantic Coretop Foraminiferal Mg/Ca and d18O Calibration Data ","studyNotes":"Coretop foraminiferal magnesium/calcium ratio and oxygen isotope \ndata from a meridional transect of 64 Atlantic samples.  Mg/Ca \nratio and d18O measured on Globigerinoides ruber (white) are used \nto evaluate shell-derived d18Oseawater estimates across different \nsalinity regimes in the Atlantic Ocean.  \n\n","version":"1.0","xmlId":"9177"}