Alto dell'Ortles Glacier Ice Core Age Models Gabrielli, P. Gabrielli, P. earth science/paleoclimate/ice cores (ice age,null,percentile,calendar year before present,null,ice cores,null,null,N,5th percentile; present defined as 2012 AD) earth science/paleoclimate/ice cores (ice age,null,percentile,calendar year before present,null,ice cores,null,null,N,95th percentile; present defined as 2012 AD) earth science/paleoclimate/ice cores (density,bulk ice,null,kilogram per cubic meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (3H,bulk ice,null,tritium unit,null,ice cores,null,null,N,null) earth science/paleoclimate/instrumental (sample identification,null,null,null,null,instrumental,null,null,C,point ID) earth science/paleoclimate/ice cores (ice age,null,null,calendar year before present,null,ice cores,null,null,N,present defined as 2012 AD) earth science/paleoclimate/ice cores (inclination,bulk ice,null,millimeter,null,ice cores,null,null,N,cumulative displacement A) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,depth water equivalent) earth science/paleoclimate/ice cores (ice age,null,null,calendar year before present,null,ice cores,null,null,N,calendar years before 2012 AD) earth science/paleoclimate/ice cores (3H,bulk ice,unspecified margin of error,tritium unit,null,ice cores,null,null,N,null) earth science/paleoclimate/instrumental (bedrock elevation,null,null,meter,null,instrumental,null,null,N,meters above mean sea level) earth science/paleoclimate/ice cores (inclination,bulk ice,null,millimeter,null,ice cores,null,null,N,cumulative displacement B) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,depth in reference core #2) earth science/paleoclimate/ice cores (sample identification,null,null,null,null,ice cores,null,null,C,core number) earth science/paleoclimate/ice cores (red intensity,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (horizontal displacement,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (green intensity,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/instrumental (longitude,null,null,meter,null,instrumental,null,null,N,UTM X WGS 1984 (Zone 32 N)) earth science/paleoclimate/instrumental (ice sheet elevation,null,null,meter,null,instrumental,null,null,N,meters above mean sea level) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (beta activity,bulk ice,null,disintegration per minute per kilogram,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (beta activity,bulk ice,one standard deviation,disintegration per minute per kilogram,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (density,bulk ice,null,kilogram per cubic meter,null,ice cores,corrected,null,N,ice corrected) earth science/paleoclimate/ice cores (blue intensity,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/instrumental (latitude,null,null,meter,null,instrumental,null,null,N,UTM Y WGS 1984 (Zone 32 N)) earth science/paleoclimate/ice core earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Alto dell'Ortles>LATITUDE 46.5089>LONGITUDE 10.545) In 2011 four ice cores were extracted from the summit of Alto dell'Ortles (3859 m), the highest glacier of South Tyrol in the Italian Alps. This drilling site is located only 37 km southwest from where the Tyrolean Iceman, ~5.3 kyrs old, was discovered emerging from the ablating ice field of Tisenjoch (3210 m, near the Italian-Austrian border) in 1991. The excellent preservation of this mummy suggested that the Tyrolean Iceman was continuously embedded in prehistoric ice and that additional ancient ice was likely preserved elsewhere in South Tyrol. Dating of the ice cores from Alto dell'Ortles based on 210Pb, tritium, beta activity and 14C determinations, combined with an empirical model (COPRA), provides evidence for a chronologically ordered ice stratigraphy from the modern glacier surface down to the bottom ice layers with an age of ~7 kyrs, which confirms the hypothesis. Our results indicate that the drilling site has continuously been glaciated on frozen bedrock since ~7 kyrs BP. Absence of older ice on the highest glacier of South Tyrol is consistent with the removal of basal ice from bedrock during the Northern Hemisphere Climatic Optimum (6-9 kyrs BP), the warmest interval in the European Alps during the Holocene. Borehole inclinometric measurements of the current glacier flow combined with surface ground penetration radar (GPR) measurements indicate that, due to the sustained atmospheric warming since the 1980s, an acceleration of the glacier Alto dell'Ortles flow has just recently begun. Given the stratigraphic-chronological continuity of the Mt. Ortles cores over millennia, it can be argued that this behaviour has been unprecedented at this location since the Northern Hemisphere Climatic Optimum. STUDY NOTES: Age Models and supporting information for the Alto dell'Ortles ice cores in the Tyrolean Alps, Italy NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Gabrielli, P. 2016-11-17 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20367 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016incl.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016flow.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016rgb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age-core2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016dtm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016beta.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age-core3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016h3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016dens.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016incl.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016flow.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016rgb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age-core2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016dtm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016beta.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age-core3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016h3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016dens.txt English https://www.ncdc.noaa.gov/paleo/study/20367 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016incl.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016flow.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016rgb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age-core2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016dtm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016beta.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016age-core3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016h3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/ortles/ortles2016dens.txt Paolo Gabrielli, Carlo Barbante, Giuliano Bertagna, Michele Bertó, Daniel Binder, Alberto Carton, Luca Carturan, Federico Cazorzi, Giulio Cozzi, Giancarlo Dalla Fontana, Mary Davis, Fabrizio De Blasi, Roberto Dinale, Gianfranco Dragà, Giuliano Dreossi, Daniela Festi, Massimo Frezzotti, Jacopo Gabrieli, Stephan P. Galos, Patrick Ginot, Petra Heidenwolf, Theo M. Jenk, Natalie Kehrwald, Donald Kenny, Olivier Magand, Volkmar Mair, Vladimir Mikhalenko, Ping Nan Lin, Klaus Oeggl, Gianni Piffer, Mirko Rinaldi, Ulrich Schotterer, Margit Schwikowski, Roberto Seppi, Andrea Spolaor, Barbara Stenni, David Tonidandel, Chiara Uglietti, Victor Zagorodnov, Thomas Zanoner, and Piero Zennaro2016Age of the Mt. Ortles ice cores, the Tyrolean Iceman and glaciation of the highest summit of South Tyrol since the Northern Hemisphere Climatic OptimumThe Cryosphere1062779-279710.5194/tc-10-2779-2016http://www.the-cryosphere.net/10/2779/2016/ START YEAR: 16895 cal yr BP * END YEAR: 0 cal yr BP 10.545 46.5089 10.545 46.5089