ITASE 330 Year Antarctic Ice Core Snow Accumulation Data Frezzotti, M.; Scarchilli, C.; Becagli, S.; Proposito, M.; Urbini, S. Frezzotti, M. Scarchilli, C. Becagli, S. Proposito, M. Urbini, 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 (D66>LATITUDE -68.94>LONGITUDE 136.94) (GV2>LATITUDE -71.71>LONGITUDE 145.26) Global climate models suggest that Antarctic snowfall should increase in a warming climate and mitigate rises in the sea level. Several processes affect surface mass balance (SMB), introducing large uncertainties in past, present and future ice sheet mass balance. To provide an extended perspective on the past SMB of Antarctica, we used 67 firn/ice core records to reconstruct the temporal variability in the SMB over the past 800 yr and, in greater detail, over the last 200 yr. Our SMB reconstructions indicate that the SMB changes over most of Antarctica are statistically negligible and that the current SMB is not exceptionally high compared to the last 800 yr. High-accumulation periods have occurred in the past, specifically during the 1370s and 1610s. However, a clear increase in accumulation of more than 10% has occurred in high SMB coastal regions and over the highest part of the East Antarctic ice divide since the 1960s. To explain the differences in behaviour between the coastal/ice divide sites and the rest of Antarctica, we suggest that a higher frequency of blocking anticyclones increases the precipitation at coastal sites, leading to the advection of moist air in the highest areas, whereas blowing snow and/or erosion have significant negative impacts on the SMB at windy sites. Eight hundred years of stacked records of the SMB mimic the total solar irradiance during the 13th and 18th centuries. The link between those two variables is probably indirect and linked to a teleconnection in atmospheric circulation that forces complex feedback between the tropical Pacific and Antarctica via the generation and propagation of a large-scale atmospheric wave train. STUDY NOTES: Snow accumulation data from 2 ITASE Antarctic ice cores. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Frezzotti, M. Investigator : Scarchilli, C. Investigator : Becagli, S. Investigator : Proposito, M. Investigator : Urbini, S. 2017-09-22 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22711 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-d66accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv2accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-d66accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv2accum.txt English https://www.ncdc.noaa.gov/paleo/study/22711 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-d66accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv2accum.txt M. Frezzotti, C. Scarchilli, S. Becagli, M. Proposito, and S. Urbini2013A synthesis of the Antarctic surface mass balance during the last 800 yrThe Cryosphere7303-31910.5194/tc-7-303-2013https://www.the-cryosphere.net/7/303/2013/ O. Magand, M. Frezzotti, M. Pourchet, B. Stenni, L. Genoni and M. Fily2004Climate variability along latitudinal and longitudinal transects in East AntarcticaAnnals of Glaciology39351-35810.3189/172756404781813961 START YEAR: 1670 AD * END YEAR: 2003 AD 136.94 -71.71 145.26 -68.94