Lake Towuti, Indonesia 60,000 Year Leaf Wax Hydrogen Isotope Data Konecky, B.L.; Russell, J.M.; Bijaksana, S. Konecky, B.L. Russell, J.M. Bijaksana, S. earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,one standard deviation,per mil,null,paleolimnology,null,null,N,analytical error on each sample (standard deviation if 3+ replicates were measured - otherwise difference between 2 replicates)) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (delta 2H,precipitation,null,per mil VSMOW,null,climate reconstructions|paleolimnology,corrected,null,N,corrected for the influence of changing vegetation on dDwax [Fig. 6]; based on C28 n-alkanoic acid) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,cm below lake floor) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,corrected,null,N,corrected for ice volune) earth science/paleoclimate/paleolimnology (Lake Towuti>LATITUDE -2.732836>LONGITUDE 121.515956) The Last Glacial Maximum was cool and dry over the Indo-Pacific Warm Pool (IPWP), a key region driving global oceanic-atmospheric circulation. Both low- and high-latitude teleconnections with insolation, ice sheets, and sea level have been suggested to explain the pervasive aridity observed in paleoecological and geomorphic data. However, proxies tracking the H- and O-isotopic composition of rainfall (e.g., speleothems, sedimentary biomarkers) suggest muted aridity or even wetter conditions than the present, complicating interpretations of glacial IPWP climate. Here we use multiproxy reconstructions from lake sediments and modern rainfall isotopic measurements from central Indonesia to show that, contrary to the classical "amount effect," intensified Australian-Indonesian monsoon circulation drove lighter H- and O-isotopic composition of IPWP rainfall during the LGM, while at the same time, dry conditions prevailed. Precipitation isotopes are particularly sensitive to the apparent increase in monsoon circulation and perhaps also decreased moisture residence time implied by our data, explaining contrasts among proxy records while illuminating glacial IPWP atmospheric circulation, a key target for climate models STUDY NOTES: Leaf wax hydrogen isotope (dD) data and reconstructed precipitation dD from sediments collected in Lake Towuti, Sulwesi, Indonesia, for the past 60,000 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Konecky, B.L. Investigator : Russell, J.M. Investigator : Bijaksana, S. 2016-08-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20453 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/pacific/towuti2016dd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/pacific/towuti2016dd.txt English https://www.ncdc.noaa.gov/paleo/study/20453 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/pacific/towuti2016dd.txt Bronwen Konecky, James Russell, Satria Bijaksana2016Glacial aridity in central Indonesia coeval with intensified monsoon circulationEarth and Planetary Science Letters43715-2410.1016/j.epsl.2015.12.037http://www.sciencedirect.com/science/article/pii/S0012821X15008006 START YEAR: 60336 cal yr BP * END YEAR: 630 cal yr BP 121.515956 -2.732836 121.515956 -2.732836