noaa-cave-9643 Asmerom Y.,et al. 2010. Fort Stanton Cave, New Mexico 55-11kY Speleothem d18O Data. Asmerom, Y.; Polyak, V.J.; Burns, S.J. Asmerom Y.,et al. 2010. Fort Stanton Cave, New Mexico 55-11kY Speleothem d18O Data. 2010-06-07 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/9643 Investigator Y. Asmerom Investigator V.J. Polyak Investigator S.J. Burns earth science paleoclimate speleothems age,null,null,calendar year before present,null,speleothems,null,null,N,present defined as 2008 CE 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 oxygen isotopes geoscientificInformation Last Interglacial 55845 cal yr BP 11309 cal yr BP Complete 33.3 33.3 -105.3 -105.3 Continent North America United States Of America New Mexico Fort Stanton>LATITUDE 33.3>LONGITUDE -105.3 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 Asmerom, Y., V.J. Polyak, and S.J. Burns 2010 Nature Geoscience 3 114-117 10.1038/ngeo754

During the last glacial period, the climate of the Northern Hemisphere was characterized by rapid, large-amplitude temperature fluctuations through cycles lasting a few thousand years. These fluctuations are apparent in Greenland temperature reconstructions, and corresponding temperature and hydrological variations have been documented throughout the Northern Hemisphere. Here we present a record of precipitation in the southwestern United States from 56,000 to 11,000 yr ago, on the basis of d18O measurements of speleothem calcite from New Mexico. Our record shows that increased winter precipitation in the southwestern United States is associated with Northern Hemisphere cooling, which we attribute to a southward shift in the polar jet stream, which modulated the position of the winter storm track over North America. On the western side of the Pacific Ocean basin, decreases in summer monsoon precipitation are associated with Northern Hemisphere cooling, due to southward displacement of the intertropical convergence zone. We conclude that cooling and warming excursions in the Northern Hemisphere lead to concurrent latitudinal displacement of both the intertropical convergence zone and the polar jet stream over the Pacific Ocean. Our data are consistent with modern evidence for a northward shift of the polar jet stream in response to global warming, which could lead to increasingly arid conditions in southwestern North America in the future.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/newmexico/fort-stanton2010.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/newmexico/fort-stanton2010.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11