{"xmlId":"75292","NOAAStudyId":"33675","studyName":"Minicoy Island, Lakshadweep, Arabian Sea, 1980-2013 CE, Porites lutea Coral d11B, Sr/Ca, Li/Ca, Mg/Ca, pK*B and pH Data","doi":"https://doi.org/10.25921/fz9n-c897","uuid":"8848fd6b-bacd-44fb-a269-17512fdc97f6","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"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."},"dataType":"CORALS AND SCLEROSPONGES","investigators":"Tarique, M.; Rahaman, W.; Fousiya, A.A.; Lathika, N.; Thamban, M.; Achyuthan, H.; Misra, S.","investigatorDetails":[{"firstName":"Mohd","lastName":"Tarique","initials":"M.","orcId":"0000-0002-3203-2694"},{"firstName":"Waliur","lastName":"Rahaman","initials":"W.","orcId":"0000-0001-6439-4529"},{"firstName":"A.A.","lastName":"Fousiya","initials":"A.A.","orcId":"0000-0002-0156-652X"},{"firstName":"Nambiyathodi","lastName":"Lathika","initials":"N.","orcId":"0000-0001-7617-6377"},{"firstName":"Meloth","lastName":"Thamban","initials":"M.","orcId":"0000-0003-3379-8189"},{"firstName":"Hema","lastName":"Achyuthan","initials":"H.","orcId":"0000-0001-5495-4115"},{"firstName":"Sambuddha","lastName":"Misra","initials":"S.","orcId":"0000-0002-8825-451X"}],"version":"1.0","funding":[{"fundingAgency":"Government of India Ministry of Earth Sciences (MoES)","fundingGrant":"PACERCryosphere and Climate"}],"studyNotes":"Boron isotopes, Sr/Ca, Li/Mg, Li/Ca and Mg/Ca data of the Porites lutea corals from the Minicoy Island, Lakshadweep in the south-eastern Arabian Sea. It also includes pK*B and pH estimates. Chronology of the core is based x-ray image and Sr/Ca ratio. For details about the chronology, please refer to the original article.","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/33675","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-coral-33675.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-coral-33675.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/coral-sclerosponge","studyCode":null,"scienceKeywords":null,"reconstruction":"Y","contributionDate":"2021-06-28","entryId":"noaa-coral-33675","earliestYearBP":-40,"mostRecentYearBP":-63,"earliestYearCE":1990,"mostRecentYearCE":2013,"publication":[{"author":{"name":"Tarique, M., Rahaman, W., Fousiya, A. A., Lathika, N., Thamban, M., Achyuthan, H., Misra, S."},"pubYear":2021,"title":"Surface pH record (1990-2013) of the Arabian Sea from boron isotopes of Lakshadweep corals  trend, variability and control","journal":"Journal of Geophysical Research: Biogeosciences","volume":"126","edition":null,"issue":"7","pages":null,"reportNumber":"e2020JG006122","citation":"Tarique, M., Rahaman, W., Fousiya, A. A., Lathika, N., Thamban, M., Achyuthan, H., Misra, S. 2021. Surface pH record (1990-2013) of the Arabian Sea from boron isotopes of Lakshadweep corals  trend, variability and control. Journal of Geophysical Research: Biogeosciences, 126(7), e2020JG006122. doi: 10.1029/2020JG006122","type":"publication","identifier":{"type":"doi","id":"10.1029/2020JG006122","url":"http://dx.doi.org/10.1029/2020JG006122"},"abstract":"Atmospheric CO2 rise in post-industrial era has resulted in decline in surface ocean pH, commonly known as ocean acidification (OA), which has become a threat to marine calcifiers. Instrumental records of ocean pH and its reconstruction utilising boron isotope (d11B) composition of corals demonstrate a long-term OA trend characterised by large spatio-temporal variability in both Pacific and Atlantic oceans. However, no such record exists to elucidate long-term OA trend of the Indian Ocean. We report the first sub-annually resolved pH record (19902013) from the Arabian Sea based on d11B measurements on Porites corals from Lakshadweep coral reefs. This pH record is characterised by large variablity ranging from7.93 to 8.65 with no long-term discernable trend. The long-term declining trend expected from the ~50 ppm increase in atmospheric CO2 during the coral growth interval appears to be obscured by large surface pH variability in the Arabian Sea. Our investigation reveals that physical oceanographic processes e.g. upwelling, downwelling and convective mixing modulated by El NiņoSouthern Oscillation (ENSO) largely control surface pH variability and masked expected long-term OA trend resulting from anthropogenic CO2 rise. Combining the model-based predictions of increase in frequency and amplitude of ENSO events in a future warming scenario and the observed ENSO dependency of surface water pH, we predict more frequent and large pH variability (pH extremes) in this region. Such pH extremes and their occurrences might be critical for the resilience and adaptability of corals and other calcifiers in Arabian Sea and other similar oceanic settings elsewhere.","pubRank":"1"}],"site":[{"NOAASiteId":"58902","siteName":"Minicoy Island","siteCode":null,"mappable":"Y","locationName":"Ocean>Indian Ocean>Arabian Sea","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["8.282","73.054667"]},"properties":{"southernmostLatitude":"8.282","northernmostLatitude":"8.282","westernmostLongitude":"73.054667","easternmostLongitude":"73.054667","minElevationMeters":null,"maxElevationMeters":null}},"paleoData":[{"dataTableName":"Minicoy trace metal,d11B,pH Data Tarique2021","NOAADataTableId":"46337","earliestYear":1990,"mostRecentYear":2013,"timeUnit":"CE","earliestYearBP":-40,"mostRecentYearBP":-63,"earliestYearCE":1990,"mostRecentYearCE":2013,"coreLengthMeters":0,"dataTableNotes":null,"species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/coral/arabian_sea/tarique2021/tarique2021-noaa.txt","urlDescription":"NOAA Template File","linkText":"Minicoy Island d11B, Sr/Ca, Li/Ca, Mg/Ca, pK*B and pH Data","variables":[{"cvDataType":"CLIMATE RECONSTRUCTIONS|CORALS AND SCLEROSPONGES","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>year Common Era","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"age"},{"cvDataType":"CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>element or compound ratio>strontium/calcium","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvError":null,"cvUnit":"concentration unit>mole fraction unit>millimole per mole","cvSeasonality":null,"cvDetail":null,"cvMethod":"laboratory method>spectroscopy>mass spectrometry","cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"Sr/Ca"},{"cvDataType":"CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>element or compound ratio>lithium/calcium","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvError":null,"cvUnit":"concentration unit>mole fraction unit>micromole per mole","cvSeasonality":null,"cvDetail":null,"cvMethod":"laboratory method>spectroscopy>mass spectrometry","cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"Li/Ca"},{"cvDataType":"CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvError":null,"cvUnit":"concentration unit>mole fraction unit>millimole per mole","cvSeasonality":null,"cvDetail":null,"cvMethod":"laboratory method>spectroscopy>mass spectrometry","cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"Mg/Ca"},{"cvDataType":"CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>element or compound ratio>lithium/magnesium","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvError":null,"cvUnit":"concentration unit>mole fraction unit>millimole per mole","cvSeasonality":null,"cvDetail":null,"cvMethod":"laboratory method>spectroscopy>mass spectrometry","cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"Li/Mg"},{"cvDataType":"INSTRUMENTAL","cvWhat":"chemical composition>solution property>dissociation constant","cvMaterial":null,"cvError":null,"cvUnit":"dimensionless","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"dissociation constant of boric acid; calculated using Hadley SST and SSS data","cvFormat":"Numeric","cvShortName":"pK*B"},{"cvDataType":"CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>isotope>isotope ratio>delta 11B","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil NIST SRM 951a","cvSeasonality":null,"cvDetail":"averaged","cvMethod":"laboratory method>spectroscopy>mass spectrometry>inductively-coupled plasma mass spectrometry","cvAdditionalInfo":"average of three measurements","cvFormat":"Numeric","cvShortName":"d11B"},{"cvDataType":"CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>isotope>isotope ratio>delta 11B","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvError":"standard deviation>two standard deviations","cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil NIST SRM 951a","cvSeasonality":null,"cvDetail":null,"cvMethod":"laboratory method>spectroscopy>mass spectrometry>inductively-coupled plasma mass spectrometry","cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"d11B_2s"},{"cvDataType":"CLIMATE RECONSTRUCTIONS|CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>solution property>acidity>pH","cvMaterial":"reconstruction material>isotope ratio>delta 11B","cvError":null,"cvUnit":"dimensionless","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Seawater pH (total scale)","cvFormat":"Numeric","cvShortName":"pHSW_tsc"},{"cvDataType":"CLIMATE RECONSTRUCTIONS|CORALS AND SCLEROSPONGES","cvWhat":"chemical composition>solution property>acidity>pH","cvMaterial":"reconstruction material>isotope ratio>delta 11B","cvError":"standard deviation>two standard deviations","cvUnit":"dimensionless","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Seawater pH (total scale)","cvFormat":"Numeric","cvShortName":"pHSW_tsc_2s"}],"NOAAKeywords":["earth science>paleoclimate>corals and sclerosponges>chemistry","earth science>paleoclimate>corals and sclerosponges>trace metals"]}]}]}],"reference":{"pastThesaurusSkos":"https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf","pastThesaurusExplorer":"https://www.ncei.noaa.gov/access/paleo-search/cvterms","gcmdKeywordThesaurus":"https://earthdata.nasa.gov/earth-observation-data/find-data/idn/gcmd-keywords"},"dataLicenseDescription":null,"dataLicenseUrl":null}