{"NOAAStudyId":"25111","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":"2018-09-10","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-25111.xml","doi":null,"earliestYearBP":205,"earliestYearCE":1745,"entryId":"noaa-ocean-25111","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-1459827, MRI-1429620"},{"fundingAgency":"National Geographic Society","fundingGrant":"NGS-9660-15"},{"fundingAgency":"Natural Sciences and Engineering Research Council of Canada","fundingGrant":"Discovery Grant"}],"investigators":"Light, T.; Williams, B.; Halfar, J.; Hou, A.; Zajacz, Z.; Tsay, A.; Adey, W.","mostRecentYearBP":-65,"mostRecentYearCE":2015,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/25111","originalSource":null,"publication":[{"abstract":"High-latitude climate reconstructions are essential for discerning anthropogenic climate change from natural climate variability. Since observational high-latitude climate records are rare prior to the satellite era, climate proxies such as the coralline algae Clathromorphum compactum are needed to generate these reconstructions. C. compactum is distributed across the northern high latitudes and documents environmental variability in the magnesium-to-calcium ratio (Mg/Ca) and d18O composition of its calcite skeleton. Therefore, paired Mg/Ca and d18O analyses in C. compactum are a promising new tool for reconstructing historic high-latitude climate change. Here a new method for C. compactum Mg/Ca analysis, laser ablation-inductively coupled plasma-optical emission spectroscopy (LA-ICP-OES), was verified through comparisons with parallel Mg/Ca transects using established techniques in a specimen from Labrador, Canada. Next, LA-ICP-OES Mg/Ca analysis in two specimens from Nunavut, Canada, was paired with d18O analyses. While Mg/Ca data across all specimens captured seasonal sea surface temperature (SST) variability, Mg/Ca values differed in replicate transects within skeleton formed at the same time regardless of technique used. This reduces the effectiveness of C. compactum Mg/Ca as a SST proxy on interannual time scales. Mg/Ca values and d18O composition differed between the two Nunavut specimens, and only one of them documented local SST, sea ice cover, and sea surface salinity. This indicates that climate archive verification is required for each unique coralline algal specimen. In the specimen from Nunavut verified here, paired Mg/Ca and d18O analyses produced more robust sea ice cover/sea surface salinity reconstructions than d18O analyses alone, supporting further development of this proxy system.","author":{"name":"Light, T., Williams, B., Halfar, J., Hou, A., Zajacz, Z., Tsay, A., and Adey, W."},"citation":"Light, T., Williams, B., Halfar, J., Hou, A., Zajacz, Z., Tsay, A., and Adey, W. 2018. Advancing Mg/Ca Analysis of Coralline Algae as a Climate Proxy by Assessing LA-ICP-OES Sampling and Coupled Mg/Ca-d18O Analysis. Geochemistry, Geophysics, Geosystems, 19. doi: 10.1029/2018GC007504","edition":null,"identifier":{"id":"10.1029/2018GC007504","type":"doi","url":"http://dx.doi.org/10.1029/2018GC007504"},"issue":null,"journal":"Geochemistry, Geophysics, Geosystems","pages":null,"pubRank":"1","pubYear":2018,"reportNumber":null,"title":"Advancing Mg/Ca Analysis of Coralline Algae as a Climate Proxy by Assessing LA-ICP-OES Sampling and Coupled Mg/Ca-d18O Analysis","type":"publication","volume":"19"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57718","geo":{"geoType":"Feature","geometry":{"coordinates":["55.398056","-59.846667"],"type":"POINT"},"properties":{"easternmostLongitude":"-59.846667","maxElevationMeters":"-15","minElevationMeters":"-15","northernmostLatitude":"55.398056","southernmostLatitude":"55.398056","westernmostLongitude":"-59.846667"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"36933","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>trace metals in carbonates"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/light2018/light2018-2013-15.txt","linkText":"Kingitok Island 2013-15(4) Mg/Ca Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"Age assigned to microprobe Mg/Ca data visually using growth bands","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Annually interpolated microprobe Mg/Ca data.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"electron probe x-ray microanalysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Age assigned to MS A Mg/Ca data visually using growth bands","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-MS Mg/Ca data for one transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-MS Mg/Ca data for one transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"laser ablation","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Age assigned to MS B Mg/Ca data visually using growth bands","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-MS Mg/Ca data for a replicate transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum 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Analytic precision- Microprobe: 3%, MS: 0.95%, LA-ICP-OES: 0.38%","earliestYear":1745,"earliestYearBP":205,"earliestYearCE":1745,"mostRecentYear":2014,"mostRecentYearBP":-64,"mostRecentYearCE":2014,"species":[],"timeUnit":"AD"}],"siteName":"Kingitok Island 2013-15(4)"},{"NOAASiteId":"57719","geo":{"geoType":"Feature","geometry":{"coordinates":["67.560556","-64.031389"],"type":"POINT"},"properties":{"easternmostLongitude":"-64.031389","maxElevationMeters":"-17","minElevationMeters":"-17","northernmostLatitude":"67.560556","southernmostLatitude":"67.560556","westernmostLongitude":"-64.031389"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"36934","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>trace metals in carbonates"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/light2018/light2018-qk-a.txt","linkText":"Qikiqtarjuaq Qk-A Mg/Ca and d18O Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"Age assigned to Mg/Ca data visually using growth bands","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for one transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for one transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"laser ablation","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for a replicate transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for a replicate transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"laser ablation","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Age assigned to delta 18O data visually using growth bands","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Annually interpolatedd18o data","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"Qk-A Mg/Ca and d18O Light2018","dataTableNotes":"Age assigned to Mg/Ca and delta 18O data visually using growth bands. Analytic precision: 2.51% for Mg/Ca; 0.08 per mil for delta 18O","earliestYear":1971,"earliestYearBP":-21,"earliestYearCE":1971,"mostRecentYear":2015,"mostRecentYearBP":-65,"mostRecentYearCE":2015,"species":[],"timeUnit":"AD"},{"NOAADataTableId":"36935","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>trace metals in carbonates"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/light2018/light2018-qk-b.txt","linkText":"Qikiqtarjuaq Qk-B Mg/Ca and d18O Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"Age assigned to Mg/Ca data visually using growth bands","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for one transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for one transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"laser ablation","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for a replicate transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Monthly interpolated LA-ICP-OES Mg/Ca data for a replicate transect.","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"laser ablation","cvSeasonality":null,"cvShortName":null,"cvUnit":"mole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":"Age assigned to delta 18O data visually using growth bands","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Annually interpolated d18o data","cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"interpolated","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coralline algae>Clathromorphum sp.>Clathromorphum compactum","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"Qk-B Mg/Ca and d18O Light2018","dataTableNotes":"Age assigned to Mg/Ca and delta 18O data visually using growth bands. Analytic precision: 2.51% for Mg/Ca; 0.08 per mil for delta 18O","earliestYear":1982,"earliestYearBP":-32,"earliestYearCE":1982,"mostRecentYear":2015,"mostRecentYearBP":-65,"mostRecentYearCE":2015,"species":[],"timeUnit":"AD"}],"siteName":"Qikiqtarjuaq"}],"studyCode":null,"studyName":"Labrador and Nunavut Mg/Ca and d18O Data from Coralline Algae covering 1745-2014 CE","studyNotes":"Mg/Ca and d18O data for 3 coralline algae specimens\r\n       Provided Keywords: Coralline algae, LA-ICP-OES, Arctic SST, Mg/Ca, d18O","version":"1.0","xmlId":"23254"}