ITASE 230 Year Antarctic Ice Core Snow Accumulation Data Frezzotti, M.; Urbini, S.; Proposito, M.; Scarchilli, C.; Gandolfi, S. Frezzotti, M. Urbini, S. Proposito, M. Scarchilli, C. Gandolfi, S. earth science/paleoclimate/ice cores (accumulation rate,snow,null,kilogram per square meter per year,null,ice cores,null,null,N,annual counting by (nssSO4 etc.)) earth science/paleoclimate/ice cores (age,null,null,year Common Era,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (31Dpt>LATITUDE -74.03>LONGITUDE 158.86) (GV5>LATITUDE -71.89>LONGITUDE 158.54) (GV7>LATITUDE -70.68>LONGITUDE 158.86) Predictions concerning Antarctica's contribution to sea level change have been hampered by poor knowledge of surface mass balance. Snow accumulation is the most direct climate indicator and has important implications for paleoclimatic reconstruction from ice cores. Snow accumulation measurements (stake, core, snow radar) taken along a 500-km transect crossing Talos Dome (East Antarctica) have been used to assess accumulation signals and the representativeness of ice core records. Stake readings show that accumulation hiatuses can occur at sites with accumulation rates below 120 kg m-2 yr-1. Differences between cores and stakes can lead to statistical misidentification of annual layers determined from seasonal signals at sites with accumulation rates below 200 kg m-2 yr-1 because of nondetection of higher and lower values. Achieving ±10% accuracy in the reconstruction of snow accumulation from single cores requires high accumulation (750 kg m-2 yr-1). Low-accumulation sites are representative if cumulative rates computed over several years are used to reach the 750 kg m-2 yr-1 threshold. Temporal variability of accumulation over the last two centuries shows no significant increase in accumulation. Wind-driven processes are a fundamental component of surface mass balance. Spatial variations in accumulation are well correlated with surface slope changes along the wind direction and may exceed 200 kg m-2 yr-1 within 1 km. Wind-driven sublimation rates are less than 50 kg m-2 yr-1 in plateau areas and up to 260 kg m-2 yr-1 in slope areas and account for 20-75% of precipitation, whereas depositional features are negligible in surface mass balance. STUDY NOTES: Snow accumulation data from 3 ITASE ice cores along a north-south transect collected in the Talos Dome area of East Antarctica. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Frezzotti, M. Investigator : Urbini, S. Investigator : Proposito, M. Investigator : Scarchilli, C. Investigator : Gandolfi, S. 2017-09-22 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22710 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv7accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv5accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase31dpt-accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv7accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv5accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase31dpt-accum.txt English https://www.ncdc.noaa.gov/paleo/study/22710 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv7accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv5accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase31dpt-accum.txt Massimo Frezzotti, Stefano Urbini, Marco Proposito, Claudio Scarchilli, Stefano Gandolfi2007Spatial and temporal variability of surface mass balance near Talos Dome, East AntarcticaJournal of Geophysical Research: Earth Surface112F210.1029/2006JF000638http://onlinelibrary.wiley.com/doi/10.1029/2006JF000638/abstract START YEAR: 1777 AD * END YEAR: 2004 AD 158.54 -74.03 158.86 -70.68