{"NOAAStudyId":"20517","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":"2016-09-18","dataPublisher":"NOAA","dataType":"PALEOLIMNOLOGY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/lake","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-20517.xml","doi":null,"earliestYearBP":666,"earliestYearCE":1284,"entryId":"noaa-lake-20517","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-1241247, EAR-0823503, ESH-0639640"},{"fundingAgency":"US NOAA","fundingGrant":"NA08OAR4310685"}],"investigators":"Richey, J.N.; Sachs, J.P.","mostRecentYearBP":-52,"mostRecentYearCE":2002,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/20517","originalSource":null,"publication":[{"abstract":"Modern seasonal and inter-annual precipitation variability in Palau is linked to both meridional movement of the Intertropical Convergence Zone (ITCZ) and changes in the Pacific Walker Circulation (PWC) associated with the El Nino-Southern Oscillation. Thus, Palau's hydroclimate should be sensitive to mean shifts in the ITCZ and PWC on decadal to centennial time scales. Using compound-specific hydrogen isotope ratios (d2H) of dinosterol in lake sediments, we generated a decadal-resolution proxy record of hydroclimatic variability in Palau spanning the past 800 yr. Results indicate a drying trend during the Little Ice Age in Palau, consistent with a southward displacement of the ITCZ. In addition to the secular drying trend, there are persistent large (~20 per mil) multi-decadal to centennial oscillations in the d2H record, the most recent of which indicates an abrupt shift to drier conditions in the mid-1970s that coincides with a decadal-scale negative shift in the Southern Oscillation Index. ","author":{"name":"J.N. Richey and J.P. Sach"},"citation":"J.N. Richey and J.P. Sach. 2016. Precipitation changes in the western tropical Pacific over the past millennium. Geology, 44(8), 671-684. doi: 10.1130/G37822.1","edition":null,"identifier":{"id":"10.1130/G37822.1","type":"doi","url":"http://dx.doi.org/10.1130/G37822.1"},"issue":"8","journal":"Geology","pages":"671-684","pubRank":"1","pubYear":2016,"reportNumber":null,"title":"Precipitation changes in the western tropical Pacific over the past millennium","type":"publication","volume":"44"}],"reconstruction":"N","scienceKeywords":["Intertropical Convergence Zone (ITCZ)","ENSO"],"site":[{"NOAASiteId":"56868","geo":{"geoType":"Feature","geometry":{"coordinates":["7.1525","134.3594"],"type":"POINT"},"properties":{"easternmostLongitude":"134.3594","maxElevationMeters":"7","minElevationMeters":"7","northernmostLatitude":"7.1525","southernmostLatitude":"7.1525","westernmostLongitude":"134.3594"}},"locationName":"Ocean>Pacific Ocean>Western Pacific Ocean>Micronesia>Palau","mappable":"Y","paleoData":[{"NOAADataTableId":"31246","coreLengthMeters":7,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>hydrogen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/pacific/palau2016d2h.txt","linkText":"Clear Lake, Palau Dinosterol Hydrogen Isotope Data","urlDescription":"Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"modeled maximum age","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":"range upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"modeled minimum age","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":"range lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organic hydroxy compound>sterol>dinosterol","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":"one standard deviation","cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organic hydroxy compound>sterol>dinosterol","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"}]}],"dataTableName":"Palau2016d2H","dataTableNotes":null,"earliestYear":1284,"earliestYearBP":666,"earliestYearCE":1284,"mostRecentYear":2002,"mostRecentYearBP":-52,"mostRecentYearCE":2002,"species":[],"timeUnit":"AD"}],"siteName":"Clear Lake Palau"}],"studyCode":null,"studyName":"Palau Lake Sediment 800 Year Dinosterol Hydrogen Isotope Data","studyNotes":"Hydrogen isotope (d2H) data on dinosterol from sediment core CL2-MW1 collected in Clear Lake, Palau, for the past 800 years","version":"1.0","xmlId":"18338"}