noaa-icecore-22711 ITASE 330 Year Antarctic Ice Core Snow Accumulation Data Frezzotti, M.; Scarchilli, C.; Becagli, S.; Proposito, M.; Urbini, S. ITASE 330 Year Antarctic Ice Core Snow Accumulation Data 2017-09-22 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22711 Investigator M. Frezzotti Investigator C. Scarchilli Investigator S. Becagli Investigator M. Proposito Investigator S. Urbini 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 accumulation geoscientificInformation 1670 AD 2003 AD 280 cal yr BP -53 cal yr BP Complete -71.71 -68.94 136.94 145.26 2143 2333 Continent Antarctica D66>LATITUDE -68.94>LONGITUDE 136.94 Continent Antarctica GV2>LATITUDE -71.71>LONGITUDE 145.26 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 M. Frezzotti, C. Scarchilli, S. Becagli, M. Proposito, and S. Urbini 2013 The Cryosphere 7 303-319 10.5194/tc-7-303-2013 https://www.the-cryosphere.net/7/303/2013/ O. Magand, M. Frezzotti, M. Pourchet, B. Stenni, L. Genoni and M. Fily 2004 Annals of Glaciology 39 351-358 10.3189/172756404781813961

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-d66accum.txt Formatted Text Data File; Core D66 Snow Accumulation Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv2accum.txt Formatted Text Data File; Core GV2 Snow Accumulation Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11