Leviathan Chronology, Nevada 175KYr Stalagmite d18O Data Lachniet, M.S.; Denniston, R.F.; Asmerom, Y.; Polyak, V.J. Lachniet, M.S. Denniston, R.F. Asmerom, Y. Polyak, V.J. Milankovitch earth science/paleoclimate/speleothems (age,null,null,calendar year before present,null,speleothems,null,null,N,present defined as 2000 CE) earth science/paleoclimate/speleothems (sample identification,null,null,null,null,speleothems,null,null,C,null) earth science/paleoclimate/speleothems (delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,averaged from multiple samples) earth science/paleoclimate/speleothems (Pinnacle Cave>LATITUDE 35.97>LONGITUDE -115.5) (Lehman Cave>LATITUDE 39>LONGITUDE -114.2) (Leviathan Cave>LATITUDE 37.89>LONGITUDE -115.58) The now arid Great Basin of western North America hosted expansive late Quaternary pluvial lakes, yet the climate forcings that sustained large ice age hydrologic variations remain controversial. Here we present a 175,000 year oxygen isotope record from precisely-dated speleothems that documents a previously unrecognized and highly sensitive link between Great Basin climate and orbital forcing. Our data match the phasing and amplitudes of 65°N summer insolation, including the classic saw-tooth pattern of global ice volume and on-time terminations. Together with the observation of cold conditions during the marine isotope substage 5d glacial inception, our data document a strong precessional-scale Milankovitch forcing of southwestern paleoclimate. Because the expansion of pluvial lakes was associated with cold glacial conditions, the reappearance of large lakes in the Great Basin is unlikely until ca. 55,000 years into the future as climate remains in a mild non-glacial state over the next half eccentricity cycle. STUDY NOTES: Please refer to these data as the "Leviathan Chronology". Individual stalagmite raw d18O data plus composite, 50-yr interpolated, d18O values with correction applied for the secular change in the d18O of the ocean and the correction for the difference in precipitation d18O values between the sites as determined from multiple regression analysis as described in the Supplemental Information and manuscript text. Ages reported in years before CE 2000. d18O is in permil relative to the VPDB scale, based on calibrated internal standards. The updated Leviathan Chronology V2 (2017) is available at: https://www.ncdc.noaa.gov/paleo/study/22870 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lachniet, M.S. Investigator : Denniston, R.F. Investigator : Asmerom, Y. Investigator : Polyak, V.J. 2014-05-29 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16517 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lmc21.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014pc1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lmc14.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lmc21.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014pc1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lmc14.txt English https://www.ncdc.noaa.gov/paleo/study/16517 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lmc21.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lc1c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014pc1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2014lmc14.txt Matthew S. Lachniet, Rhawn F. Denniston, Yemane Asmerom, Victor J. Polyak2014Orbital control of western North America atmospheric circulation and climate over two glacial cyclesNature Communications510.1038/ncomms4805http://www.nature.com/ncomms/2014/140502/ncomms4805/full/ncomms4805.html Jeremy D. Shakun, Stephen J. Burns, Peter U. Clark, Hai Cheng and R. Lawrence Edwards2011Milankovitch-paced Termination II in a Nevada speleothem?Geophysical Research Letters381810.1029/2011GL048560http://onlinelibrary.wiley.com/doi/10.1029/2011GL048560/abstract START YEAR: 174100 cal yr BP * END YEAR: 0 cal yr BP -115.58 35.97 -114.2 39