{"NOAAStudyId":"9639","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":"2010-10-18","dataPublisher":"NOAA","dataType":"CORALS AND SCLEROSPONGES","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/coral-sclerosponge","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-coral-9639.xml","doi":null,"earliestYearBP":-25,"earliestYearCE":1975,"entryId":"noaa-coral-9639","funding":[{"fundingAgency":"Government of India Department of Science and Technology","fundingGrant":null},{"fundingAgency":"Bundesministerium für Bildung und Forschung","fundingGrant":"IND 04/003"},{"fundingAgency":"Deutsche Forschungsgemeinschaft","fundingGrant":"RI 1194/3-1"},{"fundingAgency":"Government of India Ministry of Environment and Forests","fundingGrant":null},{"fundingAgency":"Government of India Ministry of Earth Sciences","fundingGrant":null},{"fundingAgency":"Hanse-Wissenschaftskolleg","fundingGrant":null}],"investigators":"Rixen, T.; Ramachandran, P.; Lehnhoff, L.; Dasbach, D.; Gaye, B.; Urban, B.; Ramachandran, R.; Ittekkot, V.","mostRecentYearBP":-56,"mostRecentYearCE":2006,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/9639","originalSource":null,"publication":[{"abstract":"North Atlantic climate variations are reflected in sedimentary records \nfrom the northern Indian Ocean in which two basins, the Arabian Sea \nand the Bay of Bengal, are strongly affected by the monsoon. Contrary \nto the Bay of Bengal the Arabian Sea plays an important role in the \nglobal marine nitrogen cycle. In its mid-water oxygen minimum zone (OMZ) \nbioavailable fixed nitrogen is reduced to nitrogen gas (NO3- -> N2), \nwhereas oxygen concentrations are slightly above the threshold of \nnitrate reduction in the OMZ of the Bay of Bengal. A coral colony \n(Porites lutea) growing south of Port Blair on the Andaman Islands \nin the Bay of Bengal was studied for its response to changes in the\nmonsoon system and its link to temperature changes in the North Atlantic \nOcean, between 1975 and 2006. Its linear extension rates, d13C and d18O \nvalues measured within the coral skeleton reveal a strong seasonality, \nwhich seems to be caused by the monsoon-driven reversal of the surface \nocean circulation. The sampling site appears to be influenced by low \nsalinity Bay of Bengal Water during the NE monsoon (boreal winter)\nand by the high salinity Arabian Sea Water during the SW monsoon \nin summer. The high salinity Arabian Sea Water circulates along with \nthe Summer Monsoon Current (S-MC) from the Arabia Sea into the Bay of \nBengal. Decreasing d18O and reconstructed salinity values correlate to \nthe increasing SSTs in the North Atlantic Ocean indicating a reduced\ninfluence of the S-MC at the sampling site in the course of northern \nhemispheric warming. During such periods oxygen-depletion became \nstronger in the OMZ of the Arabian Sea as indicated by the sedimentary \nrecords. A reduced propagation of oxygen-depleted high salinity \nArabian Sea Water into the Bay of Bengal could be a mechanism \nmaintaining oxygen concentration above the threshold of nitrate \nreduction in the OMZ of the Bay of Bengal in times of global warming. \n","author":null,"citation":"Rixen, T., P. Ramachandran, L. Lehnhoff, D. Dasbach, B. Gaye, \nB. Urban, R. Ramachandran, and V. Ittekkot.  2010. \nImpact of monsoon-driven surface ocean processes on a coral \noff Port Blair on the Andaman Islands and their link to \nNorth Atlantic climate variations.  \nGlobal and Planetary Change. \n","edition":null,"identifier":{"id":"10.1016/j.gloplacha.2010.09.005 ","type":"doi","url":"http://dx.doi.org/10.1016/j.gloplacha.2010.09.005 "},"issue":null,"journal":"Global and Planetary Change","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":null,"title":"Impact of monsoon-driven surface ocean processes on a coral  off Port Blair on the Andaman Islands and their link to  North Atlantic climate variations.  ","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Monsoon"],"site":[{"NOAASiteId":"31411","geo":{"geoType":"Feature","geometry":{"coordinates":["11.5048","92.6931"],"type":"POINT"},"properties":{"easternmostLongitude":"92.6931","maxElevationMeters":"-6","minElevationMeters":"-6","northernmostLatitude":"11.5048","southernmostLatitude":"11.5048","westernmostLongitude":"92.6931"}},"locationName":"Ocean>Indian Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"18605","coreLengthMeters":0,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>corals and sclerosponges>carbon isotopes","earth science>paleoclimate>corals and sclerosponges>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/port-blair2010.txt","linkText":"port-blair2010.txt","urlDescription":"Coral","variables":[{"cvAdditionalInfo":null,"cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"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":null,"cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"raw","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":null,"cvDataType":"CORALS AND SCLEROSPONGES","cvDetail":"raw","cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>coral>Porites sp.>Porites lutea","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]},{"NOAAKeywords":["earth science>paleoclimate>corals and sclerosponges>oxygen isotopes","earth science>paleoclimate>corals and sclerosponges>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/port-blair2010.xls","linkText":"port-blair2010.xls","urlDescription":"Coral","variables":[]}],"dataTableName":"1","dataTableNotes":"6.4 cm diameter Coral core off Port Blair, Andaman Islands","earliestYear":1975,"earliestYearBP":-25,"earliestYearCE":1975,"mostRecentYear":2006,"mostRecentYearBP":-56,"mostRecentYearCE":2006,"species":[],"timeUnit":"AD"}],"siteName":"Port Blair"}],"studyCode":null,"studyName":"Port Blair, Andaman Islands 1975-2006 Coral Stable Isotope Data ","studyNotes":"Andaman Islands coral stable isotope data at monthly resolution.  \nA Porites lutea colony from a reef south of Port Blair was sampled \nin March 2006, at a water depth of ~6 m. The core has a diameter \nof 6.4 cm and a length of ~37 cm.\n\nThe d18O and d13C values were calibrated relative to NBS19 \nand are given in per mil deviation from the PDB.\n","version":"1.0","xmlId":"8626"}