# ITASE 230 Year Antarctic Ice Core Snow Accumulation Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22710 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase-gv7accum.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Ice Core # # Dataset DOI: # # Parameter_Keywords: accumulation #-------------------- # Contribution_Date # Date: 2017-09-22 #-------------------- # File_Last_Modified_Date # Date: 2017-09-22 #-------------------- # Title # Study_Name: ITASE 230 Year Antarctic Ice Core Snow Accumulation Data #-------------------- # Investigators # Investigators: Frezzotti, M.; Urbini, S.; Proposito, M.; Scarchilli, C.; Gandolfi, S. #-------------------- # Description_Notes_and_Keywords # Description: Snow accumulation data from 3 ITASE ice cores along a north-south transect collected in the Talos Dome area of East Antarctica. # No thinning function applied. Upstream glaciology condition from field data or/and satellite survey (DEM, Landsat etc.): si. # Upstream glaciology influence the SMB stratigraphy: No #-------------------- # Publication # Authors: Massimo Frezzotti, Stefano Urbini, Marco Proposito, Claudio Scarchilli, Stefano Gandolfi # Published_Date_or_Year: 2007-06-13 # Published_Title: Spatial and temporal variability of surface mass balance near Talos Dome, East Antarctica # Journal_Name: Journal of Geophysical Research: Earth Surface # Volume: 112 # Edition: F02032 # Issue: F2 # Pages: # Report_Number: # DOI: 10.1029/2006JF000638 # Online_Resource: http://onlinelibrary.wiley.com/doi/10.1029/2006JF000638/abstract # Full_Citation: # Abstract: 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. #------------------ # Funding_Agency # Funding_Agency_Name: PNRA # Grant: ITASE2001 #------------------ # Site_Information # Site_Name: GV7 # Location: Antarctica # Country: # Northernmost_Latitude: -70.68 # Southernmost_Latitude: -70.68 # Easternmost_Longitude: 158.86 # Westernmost_Longitude: 158.86 # Elevation: 1947 m #------------------ # Data_Collection # Collection_Name: GV7Accum # Earliest_Year: 1854 # Most_Recent_Year: 2004 # Time_Unit: AD # Core_Length: 55 # Notes: mean annual accumulation rate 237 mm w.e./year; 2002-2004 values from stake measurements #------------------ # Chronology_Information # Chronology: # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: one per line, shortname-tab-variable components (what, material, error, units, seasonality, data type,detail, method, C or N for Character or Numeric data, free text) # ## age_AD age, , , AD, , , , ,N, ## accum accumulation rate, snow, , kg/m2/yr, annual, ice core, annual counting by (nssSO4 etc.),,N, # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # age_AD accum 2004 352 2003 113 2002 290 2001 174 2000 272 1999 290 1998 238 1997 233 1996 232 1995 252 1994 222 1993 293 1992 390 1991 302 1990 220 1989 190 1988 212 1987 251 1986 242 1985 198 1984 153 1983 305 1982 268 1981 190 1980 237 1979 169 1978 299 1977 249 1976 207 1975 199 1974 268 1973 223 1972 237 1971 331 1970 239 1969 101 1968 269 1967 254 1966 377 1965 253 1964 211 1963 393 1962 176 1961 201 1960 241 1959 195 1958 112 1957 273 1956 236 1955 208 1954 173 1953 208 1952 272 1951 301 1950 458 1949 217 1948 190 1947 200 1946 180 1945 234 1944 241 1943 292 1942 311 1941 199 1940 130 1939 228 1938 261 1937 230 1936 201 1935 161 1934 240 1933 230 1932 273 1931 269 1930 254 1929 258 1928 201 1927 223 1926 237 1925 232 1924 218 1923 319 1922 201 1921 260 1920 168 1919 243 1918 171 1917 226 1916 271 1915 155 1914 289 1913 288 1912 231 1911 222 1910 233 1909 230 1908 218 1907 178 1906 205 1905 242 1904 273 1903 235 1902 224 1901 142 1900 187 1899 233 1898 278 1897 222 1896 242 1895 186 1894 260 1893 278 1892 218 1891 133 1890 215 1889 300 1888 252 1887 293 1886 214 1885 184 1884 145 1883 396 1882 203 1881 180 1880 226 1879 242 1878 262 1877 335 1876 148 1875 221 1874 210 1873 226 1872 355 1871 110 1870 251 1869 338 1868 332 1867 127 1866 301 1865 232 1864 153 1863 249 1862 167 1861 221 1860 268 1859 236 1858 189 1857 173 1856 236 1855 251 1854 297