noaa-icecore-21970 Mt. Hunter, Alaska 1,200 Year Ice Core Accumulation Data Winski, D.A.; Osterberg, E.; Ferris, D.; Kreutz, K.J.; Wake, C.; Campbell, S.; Hawley, R.; Roy, S.; Birkel, S.; Introne, D.S.; Handley, M. Mt. Hunter, Alaska 1,200 Year Ice Core Accumulation Data 2017-12-19 NCDC-Paleoclimatology ONLINE Files 10.7289/V5B56H0D https://www.ncdc.noaa.gov/paleo/study/21970 Investigator D.A. Winski Investigator E. Osterberg Investigator D. Ferris Investigator K.J. Kreutz Investigator C. Wake Investigator S. Campbell Investigator R. Hawley Investigator S. Roy Investigator S. Birkel Investigator D.S. Introne Investigator M. Handley earth science paleoclimate ice cores ice age,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter,annual,ice cores,null,null,N,meters of water equivalent earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter,Sep-Apr,ice cores,null,null,N,meters of water equivalent; Winter accumulation for a given year includes September-December of the previous year and January-April of the specified year earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter,May-Aug,ice cores,null,null,N,meters of water equivalent earth science paleoclimate ice core accumulation geoscientificInformation 810 AD 2012 AD 1140 cal yr BP -62 cal yr BP Complete 62.9333 62.9333 -151.0833 -151.0833 3900 3900 Continent North America United States Of America Alaska Mt. Hunter>LATITUDE 62.9333>LONGITUDE -151.0833 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 Dominic Winski, Erich Osterberg, David Ferris, Karl Kreutz, Cameron Wake, Seth Campbell, Robert Hawley, Samuel Roy, Sean Birkel, Douglas Introne, Michael Handley 2017 Scientific Reports 17869 7 10.1038/s41598-017-18022-5 https://www.nature.com/articles/s41598-017-18022-5

Future precipitation changes in a warming climate depend regionally upon the response of natural climate modes to anthropogenic forcing. North Pacific hydroclimate is dominated by the Aleutian Low, a semi-permanent wintertime feature characterized by frequent low-pressure conditions that is influenced by tropical Pacific Ocean temperatures through the Pacific-North American (PNA) teleconnection pattern. Instrumental records show a recent increase in coastal Alaskan precipitation and Aleutian Low intensification, but are of insufficient length to accurately assess low frequency trends and forcing mechanisms. Here we present a 1200-year seasonally- to annually-resolved ice core record of snow accumulation from Mt. Hunter in the Alaska Range developed using annual layer counting and four ice-flow thinning models. Under a wide range of glacier flow conditions and layer counting uncertainty, our record shows a doubling of precipitation since ~1840 CE, with recent values exceeding the variability observed over the past millennium. The precipitation increase is nearly synchronous with the warming of western tropical Pacific and Indian Ocean sea surface temperatures. While regional 20th Century warming may account for a portion of the observed precipitation increase on Mt. Hunter, the magnitude and seasonality of the precipitation change indicate a long-term strengthening of the Aleutian Low. STUDY NOTES: Reconstructed annual and seasonal snow accumulation data from the Mt. Hunter ice core.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/denali/hunter2017accum.txt NOAA Template File; Mt. Hunter Ice Core Accumulation Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11