noaa-lake-20517 Palau Lake Sediment 800 Year Dinosterol Hydrogen Isotope Data Richey, J.N.; Sachs, J.P. Palau Lake Sediment 800 Year Dinosterol Hydrogen Isotope Data 2016-09-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20517 Investigator J.N. Richey Investigator J.P. Sachs earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology age,null,null,year Common Era,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology age,null,range upper bound,year Common Era,null,paleolimnology,null,null,N,modeled maximum age earth science paleoclimate paleolimnology delta 2H,dinosterol,one standard deviation,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology age,null,range lower bound,year Common Era,null,paleolimnology,null,null,N,modeled minimum age earth science paleoclimate paleolimnology delta 2H,dinosterol,null,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology hydrogen isotopes geoscientificInformation ENSO Intertropical Convergence Zone (ITCZ) 1284 AD 2002 AD 666 cal yr BP -52 cal yr BP Complete 7.1525 7.1525 134.3594 134.3594 7 7 Ocean Pacific Ocean Western Pacific Ocean Micronesia Palau Clear Lake Palau>LATITUDE 7.1525>LONGITUDE 134.3594 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII J.N. Richey and J.P. Sach 2016 Geology 44 8 671-684 10.1130/G37822.1 http://geology.gsapubs.org/content/44/8/671.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. STUDY NOTES: Hydrogen isotope (d2H) data on dinosterol from sediment core CL2-MW1 collected in Clear Lake, Palau, for the past 800 years

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/pacific/palau2016d2h.txt Data File; Clear Lake, Palau Dinosterol Hydrogen Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11