noaa-cave-22870 Leviathan Chronology v2, Nevada 174KYr Stalagmite d18O Data Lachniet, M.S.; Asmerom, Y.; Polyak, V.J.; Denniston, R.F. Leviathan Chronology v2, Nevada 174KYr Stalagmite d18O Data 2017-10-11 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22870 Investigator M.S. Lachniet Investigator Y. Asmerom Investigator V.J. Polyak Investigator R.F. Denniston earth science paleoclimate speleothems delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,composited|corrected|interpolated,isotope ratio mass spectrometry,N,corrected for ice-volume 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 delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,composited|interpolated,isotope ratio mass spectrometry,N,composite 100-yr interpolated earth science paleoclimate speleothems delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,composited|corrected|filtered|interpolated,isotope ratio mass spectrometry,N,filtered for difference in precipitation d18O values between the sites as determined from multiple regression analysis earth science paleoclimate speleothems oxygen isotopes geoscientificInformation 204200 cal yr BP 0 cal yr BP Complete 36.4256 37.89 -116.2908 -115.58 719 2400 Continent North America United States Of America Nevada Devils Hole>LATITUDE 36.4256>LONGITUDE -116.2908 Continent North America United States Of America Nevada Leviathan Cave>LATITUDE 37.89>LONGITUDE -115.58 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 Matthew Lachniet, Yemane Asmerom, Victor Polyak, Rhawn Denniston 2017 Scientific Reports 7 1 10.1038/s41598-017-13279-2 https://www.nature.com/articles/s41598-017-13279-2 Gina E. Moseley, R. Lawrence Edwards, Kathleen A. Wendt, Hai Cheng, Yuri Dublyansky, Yanbin Lu, Ronny Boch, Christoph Spötl 2016 Science 351 6269 165-168 10.1126/science.aad4132 http://science.sciencemag.org/content/351/6269/165

The driving force behind Quaternary glacial-interglacial cycles and much associated climate change is widely considered to be orbital forcing. However, previous versions of the iconic Devils Hole (Nevada) subaqueous calcite record exhibit shifts to interglacial values ~10,000 years before orbitally forced ice age terminations, and interglacial durations ~10,000 years longer than other estimates. Our measurements from Devils Hole 2 replicate virtually all aspects of the past 204,000 years of earlier records, except for the timing during terminations, and they lower the age of the record near Termination II by ~8000 years, removing both ~10,000-year anomalies. The shift to interglacial values now broadly coincides with the rise in boreal summer insolation, the marine termination, and the rise in atmospheric CO2, which is consistent with mechanisms ultimately tied to orbital forcing. STUDY NOTES: Stalagmite d18O values from Leviathan Cave and Devils Hole, Nevada, known as the Leviathan Chronology v2. The original 2014 Leviathan Chronology is archived at: https://www.ncdc.noaa.gov/paleo/study/16517

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/devilshole2017.txt Formatted Text Data File; Devils Hole 100-yr Interpolated d18O Values GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/nevada/leviathan2017.txt Formatted Text Data File; Leviathan Cave 100-yr Interpolated d18O Values USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11