Mt. Hunter, Alaska 230 Year Ice Core Melt Layer Data Winski, D.A.; Osterberg, E.; Kreutz, K.J.; Wake, C.; Ferris, D.; Campbell, S.; Baum, M.; Bailey, A.; Birkel, S.; Introne, D.S.; Handley, M. Winski, D.A. Osterberg, E. Kreutz, K.J. Wake, C. Ferris, D. Campbell, S. Baum, M. Bailey, A. Birkel, S. Introne, D.S. Handley, M. earth science/paleoclimate/ice cores (ice age,null,null,year Common Era,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth at sample end,null,null,meter,null,ice cores,null,null,N,top depth) earth science/paleoclimate/ice cores (reflectance,bulk ice,null,dimensionless,null,ice cores,null,null,N,corrected) earth science/paleoclimate/ice cores (layer thickness,bulk ice,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (reflectance,bulk ice,null,dimensionless,null,ice cores,corrected,null,N,null) earth science/paleoclimate/ice cores (reflectance,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (density,bulk ice,null,gram per cubic centimeter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (layer thickness,bulk ice,null,meter,null,ice cores,null,null,N,adjusted) earth science/paleoclimate/ice cores (reflectance,bulk ice,unspecified margin of error,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (Mt. Hunter>LATITUDE 62.9333>LONGITUDE -151.0833) Warming in high-elevation regions has societally important impacts on glacier mass balance, water resources, and sensitive alpine ecosystems, yet very few high-elevation temperature records exist from the middle or high latitudes. While a variety of paleoproxy records provide critical temperature records from low elevations over recent centuries, melt layers preserved in alpine glaciers present an opportunity to develop calibrated, annually-resolved temperature records from high elevations. Here we present a 400-year temperature proxy record based on the melt-layer stratigraphy of two ice cores collected from Mt. Hunter in Denali National Park in the Central Alaska Range. The ice core record shows a 60-fold increase in water equivalent total annual melt between the pre-industrial period (before 1850 CE) and present day. We calibrate the melt record to summer temperatures based on weather station data from the ice core drill site, and find that the increase in melt production represents a summer warming rate of at least 1.92 +/- 0.31C/century during the last 100 years, exceeding rates of temperature increase at most low elevation sites in Alaska. The Mt. Hunter melt layer record is significantly (p < 0.05) correlated with surface temperatures in the central tropical Pacific through a Rossby-wave like pattern that enhances high temperatures over Alaska. Our results show that rapid alpine warming has taken place in the Alaska Range for at least a century and that conditions in the tropical oceans contribute to this warming. STUDY NOTES: Melt layer stratigraphic data from the Mt. Hunter ice core NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Winski, D.A. Investigator : Osterberg, E. Investigator : Kreutz, K.J. Investigator : Wake, C. Investigator : Ferris, D. Investigator : Campbell, S. Investigator : Baum, M. Investigator : Bailey, A. Investigator : Birkel, S. Investigator : Introne, D.S. Investigator : Handley, M. 2018-03-26 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23750 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/denali/hunter2018melt2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/denali/hunter2018melt1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/denali/hunter2018melt2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/denali/hunter2018melt1.txt English https://www.ncdc.noaa.gov/paleo/study/23750 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/denali/hunter2018melt2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/denali/hunter2018melt1.txt Dominic Winski, Erich Osterberg, Karl Kreutz, Cameron Wake, David Ferris, Seth Campbell, Mark Baum, Adriana Bailey, Sean Birkel, Douglas Introne, Mike Handley2018A 400‐year ice core melt layer record of summertime warming in the Alaska RangeJournal of Geophysical Research: Atmospheres12310.1002/2017JD027539 START YEAR: 1785 AD * END YEAR: 2013 AD -151.0833 62.9333 -151.0833 62.9333