noaa-borehole-22591 West Antarctic Ice Sheet Divide Borehole temperature reconstruction over the last 2000 years Orsi, A.J.; Cornuelle, B.D.; Severinghaus, J. West Antarctic Ice Sheet Divide Borehole temperature reconstruction over the last 2000 years 2017-05-19 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22591 Investigator A.J. Orsi Investigator B.D. Cornuelle Investigator J. Severinghaus earth science paleoclimate climate reconstructions surface temperature,null,unspecified margin of error,degree Celsius,annual,climate reconstructions,null,numerical simulation,N,inverse model earth science paleoclimate borehole|climate reconstructions surface temperature,null,one standard deviation,degree Celsius,annual,borehole|climate reconstructions,null,inverse model,N,null earth science paleoclimate borehole|climate reconstructions surface temperature,null,null,degree Celsius,annual,borehole|climate reconstructions,null,inverse model,N,null earth science paleoclimate borehole age,null,null,year Common Era,null,borehole,null,null,N,null earth science paleoclimate climate reconstructions surface temperature,null,null,degree Celsius,annual,climate reconstructions,null,numerical simulation,N,inverse model earth science paleoclimate borehole|climate reconstructions age,null,null,year Common Era,null,borehole|climate reconstructions,null,null,N,null earth science paleoclimate boreholes physical properties geoscientificInformation Air Temperature Reconstruction 8 AD 2007 AD 1942 cal yr BP -57 cal yr BP Complete -79.463 -79.463 -112.125 -112.125 1766 1766 Continent Antarctica WAIS Divide>LATITUDE -79.463>LONGITUDE -112.125 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 Orsi, Anais J., Bruce D. Cornuelle, and Jeffrey P. Severinghaus 2012 Geophysical Research Letters 39 9 L09710 10.1029/2012GL051260

The largest climate anomaly of the last 1000 years in the Northern Hemisphere was the Little Ice Age (LIA) from 1400–1850 C.E., but little is known about the signature of this event in the Southern Hemisphere, especially in Antarctica. We present temperature data from a 300 m borehole at the West Antarctic Ice Sheet (WAIS) Divide. Results show that WAIS Divide was colder than the last 1000-year average from 1300 to 1800 C.E. The temperature in the time period 1400–1800 C.E. was on average 0.52 ± 0.28°C colder than the last 100-year average. This amplitude is about half of that seen at Greenland Summit (GRIP). This result is consistent with the idea that the LIA was a global event, probably caused by a change in solar and volcanic forcing, and was not simply a seesaw-type redistribution of heat between the hemispheres as would be predicted by some ocean-circulation hypotheses. The difference in the magnitude of the LIA between Greenland and West Antarctica suggests that the feedbacks amplifying the radiative forcing may not operate in the same way in both regions. STUDY NOTES: The first 1000 years are not well constrained. See the paper for details.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Ant-WAIS-Divide.Severinghaus.2012.txt NOAA Template File; PAGES 2k v2 Original Contribution GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Ant-WAIS-Divide.Severinghaus.2012.lpd Linked Paleo Data (LiPD) File; PAGES 2k v2 Original Contribution GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/borehole/severinghaus2012/severinghaus2012-wais.txt NOAA Template File; WAIS Divide Temperature Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11