West Antarctic Ice Sheet Divide Snow Accumulation Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: West Antarctic Ice Sheet Divide Snow Accumulation Data LAST UPDATE: 7/2008 (Original receipt by WDC Paleo) CONTRIBUTOR: Ryan Banta, Desert Research Institute IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2009-078 WDC PALEO CONTRIBUTION SERIES CITATION: Banta, R., et al. 2009. West Antarctic Ice Sheet Divide Snow Accumulation Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2009-078. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Banta, J.R., J.R. McConnell, M.M. Frey, R.C. Bales, and K. Taylor. 2008. Spatial and temporal variability in snow accumulation at the West Antarctic Ice Sheet Divide over recent centuries. J. Geophys. Res., 113, D23102, doi:10.1029/2008JD010235. ABSTRACT: Ice cores collected in 2000 (ITASE 00-1) and 2005 (WDC05A, WDC05Q) from the West Antarctic Ice Sheet Divide (WAIS Divide) project site were used to investigate the spatial and temporal variability in accumulation. The ice cores were dated based on annual layer counting of multiple glaciochemical measurements resulting in bottom depth ages for WDC05A, WDC05Q, and ITASE 00-1 of 1775, 1521, and 1653 A.D., with mean annual accumulation rates of 0.200, 0.204, and 0.221 mweq a-1, respectively. Small-scale spatial variability (SSV) was determined using an analysis of variance of accumulation in the ice core array, thereby quantifying the uncertainty in individual accumulation records. Results indicate that the spatial variability was 0.030 mweq a-1, or approximately 15% of the average annual accumulation. An accumulation record representative of the WAIS Divide local area over recent centuries was developed using a principal component analysis to identify the coherent accumulation signal. The WAIS Divide local record exhibited 14% interannual variability (1 standard deviation of the mean) with the SSV reduced to 0.017 mweq a-1. Correlations of the WAIS Divide local accumulation record with atmospheric indices (e.g., Antarctic Oscillation) exhibited periods when the records oscillate in and out of phase. Thus, reconstructing local and global atmospheric indices from WAIS Divide accumulation records over recent centuries may prove problematic. GEOGRAPHIC REGION: Antarctica PERIOD OF RECORD: 1521 - 2004 AD FUNDING SOURCES: US National Science Foundation, grants OPP 9904294, OPP 0538427, OPP 0636929, and OPP 9814810. DESCRIPTION: Multicentury snow accumulation records from 3 cores of the West Antarctic Ice Sheet Divide (WAIS) project, analyzed using the Continuous Flow Analysis–Trace Elements Dual (CFATED) methodology. WAIS Divide Core Locations: WDC05A: 79.463ºS, 112.125ºW, 1759 m elev. WDC05Q: 79.468ºS, 112.086ºW, 1759 m elev. ITASE 00-1: 79.383ºS, 111.239ºW, 1791 m elev. DATA: Banta et al. 2008 WAIS snow accumulation data Column 1: Calendar Year Column 2: Core WDC05Q Net Snow Accumulation, kg m-2 y-1 Column 3: Core WDC05A Net Snow Accumulation, kg m-2 y-1 Column 4: Core ITASE_00-1 Net Snow Accumulation, kg m-2 y-1 Snow accumulation reported in water equivalents Site WDC05Q WDC05A ITASE_00-1 CalYr Accum. Accum. Accum. 2004 141 204 2003 223 199 2002 193 237 2001 201 150 2000 232 282 1999 172 216 248 1998 191 122 255 1997 179 185 161 1996 178 166 239 1995 171 134 192 1994 234 250 214 1993 222 357 91 1992 276 191 251 1991 195 184 299 1990 177 182 276 1989 166 181 174 1988 233 198 188 1987 217 181 210 1986 197 197 190 1985 190 228 266 1984 238 247 260 1983 176 162 222 1982 232 224 242 1981 249 209 290 1980 219 254 284 1979 233 223 175 1978 157 172 192 1977 193 200 287 1976 205 153 162 1975 154 236 255 1974 183 161 198 1973 197 177 196 1972 208 262 256 1971 179 167 245 1970 180 199 231 1969 151 197 179 1968 257 171 199 1967 210 186 259 1966 182 180 247 1965 231 240 182 1964 241 185 256 1963 171 213 279 1962 180 177 171 1961 156 193 164 1960 245 202 305 1959 182 169 270 1958 221 232 204 1957 193 189 222 1956 203 215 244 1955 123 189 175 1954 194 156 190 1953 218 205 232 1952 243 243 264 1951 237 243 272 1950 196 263 217 1949 153 173 240 1948 212 173 195 1947 187 164 192 1946 214 210 251 1945 237 180 209 1944 152 199 253 1943 205 196 192 1942 192 225 315 1941 239 230 345 1940 244 224 138 1939 181 213 235 1938 197 217 275 1937 242 179 238 1936 183 220 186 1935 204 202 232 1934 216 225 294 1933 200 210 202 1932 204 182 196 1931 194 197 229 1930 263 237 310 1929 155 139 193 1928 185 217 260 1927 206 221 262 1926 257 230 212 1925 141 144 254 1924 191 189 198 1923 158 176 131 1922 174 165 164 1921 207 251 253 1920 243 218 279 1919 243 196 241 1918 226 280 250 1917 176 146 195 1916 212 215 236 1915 185 163 212 1914 165 200 211 1913 223 212 236 1912 196 166 227 1911 216 205 203 1910 93 142 164 1909 187 197 194 1908 169 184 217 1907 107 172 130 1906 220 130 202 1905 157 201 263 1904 300 249 261 1903 187 181 219 1902 226 265 217 1901 256 255 340 1900 227 205 262 1899 205 212 185 1898 218 229 191 1897 177 156 214 1896 244 213 304 1895 157 152 155 1894 163 209 205 1893 201 220 282 1892 181 99 152 1891 201 247 266 1890 195 218 213 1889 218 204 249 1888 231 195 202 1887 198 235 258 1886 187 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