noaa-icecore-22520 ITASE-2002-4 Antarctic Ice Core 400 Year Oxygen Isotope Data Steig, E.J. ITASE-2002-4 Antarctic Ice Core 400 Year Oxygen Isotope Data 2017-05-19 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22520 Investigator E.J. Steig earth science paleoclimate ice core oxygen isotopes geoscientificInformation 1593 AD 2002 AD 357 cal yr BP -52 cal yr BP Complete -86.5 -86.5 -107.99 -107.99 2586 2586 Continent Antarctica ITASE 02-4>LATITUDE -86.5>LONGITUDE -107.99 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 Eric J. Steig, Qinghua Ding, James W.C. White, Marcel Küttel, Summer B. Rupper, Thomas A. Neumann, Peter D. Neff, Ailie J.E. Gallant, Paul A. Mayewski, Kendrick C. Taylor, Georg Hoffmann, Daniel A. Dixon, Spruce W. Schoenemann, Bradley R. Markle, Tyler J. Fudge, David P. Schneider, Andrew J. Schauer, Rebecca P. Teel, Bruce H. Vaughn, Landon Burgener, Jessica Williams, Elena Korotkikh 2013 Nature Geoscience 6 5 372-375 10.1038/ngeo1778 http://www.nature.com/ngeo/journal/v6/n5/full/ngeo1778.html David P. Schneider and Eric J. Steig 2008 Proceedings of the National Academy of Sciences 105 34 12154-12158 10.1073/PNAS.0803627105 http://www.pnas.org/content/105/34/12154

Changes in atmospheric circulation over the past five decades have enhanced the wind-driven inflow of warm ocean water onto the Antarctic continental shelf, where it melts ice shelves from below. Atmospheric circulation changes have also caused rapid warming over the West Antarctic Ice Sheet, and contributed to declining sea-ice cover in the adjacent Amundsen-Bellingshausen seas. It is unknown whether these changes are part of a longer-term trend. Here, we use water-isotope (d18O) data from an array of ice-core records to place recent West Antarctic climate changes in the context of the past two millennia. We find that the d18O of West Antarctic precipitation has increased significantly in the past 50 years, in parallel with the trend in temperature, and was probably more elevated during the 1990s than at any other time during the past 200 years. However, d18O anomalies comparable to those of recent decades occur about 1% of the time over the past 2,000 years. General circulation model simulations suggest that recent trends in d18O and climate in West Antarctica cannot be distinguished from decadal variability that originates in the tropics. We conclude that the uncertain trajectory of tropical climate variability represents a significant source of uncertainty in projections of West Antarctic climate and ice-sheet change. STUDY NOTES: Antarctic ice core ITASE-2002-4 sub-annual oxygen isotope (d18O) data for the past 400 years.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase2002d18o.txt Formatted Text Data File; ITASE-2002-4 Oxygen Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11