# 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/itase31dpt-accum.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. #------------------ # Publication # Authors: Massimo Frezzotti, Michel Pourchet, Onelio Flora, Stefano Gandolfi, Michel Gay, Stefano Urbini, Christian Vincent, Silvia Becagli, Roberto Gragnani, Marco Proposito, Mirko Severi, Rita Traversi, Roberto Udisti, and Michel Fily # Published_Date_or_Year: 2005-01-01 # Published_Title: Spatial and temporal variability of snow accumulation in East Antarctica from traverse data # Journal_Name: Journal of Glaciology # Volume: 51 # Edition: # Issue: 172 # Pages: 113-124 # Report_Number: # DOI: 10.3189/172756505781829502 # Online_Resource: https://www.cambridge.org/core/journals/journal-of-glaciology/article/spatial-and-temporal-variability-of-snow-accumulation-in-east-antarctica-from-traverse-data/65BBD5D3A38FC4B69E416EDD471E07D5 # Full_Citation: # Abstract: Recent snow accumulation rate is a key quantity for ice-core and mass-balance studies. Several accumulation measurement methods (stake farm, fin core, snow-radar profiling, surface morphology, remote sensing) were used, compared and integrated at eight sites along a transect from Terra Nova Bay to Dome C, East Antarctica, to provide information about the spatial and temporal variability of snow accumulation. Thirty-nine cores were dated by identifying tritium/b marker levels (1965_66) and non-sea-salt (nss) SO4 2- spikes of the Tambora (Indonesia) volcanic event (1816) in order to provide information on temporal variability. Cores were linked by snow radar and global positioning system surveys to provide detailed information on spatial variability in snow accumulation. Stake-farm and ice-core accumulation rates are observed to differ significantly, but isochrones (snow radar) correlate well with ice-core derived accumulation. The accumulation/ablation pattern from stake measurements suggests that the annual local noise (metre scale) in snow accumulation can approach 2 years of ablation and more than four times the average annual accumulation, with no accumulation or ablation for a 5 year period in up to 40% of cases. The spatial variability of snow accumulation at the kilometre scale is one order of magnitude higher than temporal variability at the multi-decadal/secular scale. Stake measurements and firn cores at Dome C confirm an approximate 30% increase in accumulation over the last two centuries, with respect to the average over the last 5000 years. #------------------ # Funding_Agency # Funding_Agency_Name: PNRA # Grant: ITASE1998 #------------------ # Site_Information # Site_Name: 31Dpt # Location: Antarctica # Country: # Northernmost_Latitude: -74.03 # Southernmost_Latitude: -74.03 # Easternmost_Longitude: 158.86 # Westernmost_Longitude: 158.86 # Elevation: 2069 m #------------------ # Data_Collection # Collection_Name: 31DptAccum # Earliest_Year: 1777 # Most_Recent_Year: 2003 # Time_Unit: AD # Core_Length: 48 # Notes: mean annual accumulation rate 98 mm w.e./year; 1999-2003 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 2003 61 2002 133 2001 96 2000 96 1999 105 1998 60 1997 101 1996 178 1995 100 1994 176 1993 162 1992 73 1991 91 1990 109 1989 102 1988 131 1987 60 1986 155 1985 66 1984 196 1983 125 1982 103 1981 113 1980 53 1979 133 1978 131 1977 70 1976 102 1975 50 1974 128 1973 106 1972 122 1971 95 1970 41 1969 112 1968 41 1967 166 1966 138 1965 184 1964 31 1963 158 1962 138 1961 135 1960 123 1959 121 1958 64 1957 96 1956 121 1955 76 1954 76 1953 116 1952 73 1951 57 1950 110 1949 141 1948 78 1947 73 1946 49 1945 75 1944 109 1943 62 1942 106 1941 108 1940 135 1939 47 1938 125 1937 41 1936 158 1935 56 1934 79 1933 79 1932 115 1931 127 1930 127 1929 35 1928 103 1927 114 1926 80 1925 34 1924 91 1923 68 1922 79 1921 113 1920 57 1919 80 1918 162 1917 69 1916 116 1915 123 1914 135 1913 67 1912 135 1911 78 1910 34 1909 84 1908 62 1907 113 1906 45 1905 73 1904 88 1903 151 1902 78 1901 86 1900 47 1899 153 1898 130 1897 120 1896 120 1895 84 1894 133 1893 97 1892 231 1891 49 1890 125 1889 137 1888 111 1887 133 1886 72 1885 121 1884 49 1883 151 1882 38 1881 164 1880 165 1879 89 1878 89 1877 89 1876 140 1875 179 1874 77 1873 51 1872 125 1871 125 1870 63 1869 113 1868 64 1867 129 1866 64 1865 68 1864 204 1863 63 1862 76 1861 88 1860 57 1859 114 1858 64 1857 180 1856 90 1855 143 1854 105 1853 79 1852 158 1851 62 1850 66 1849 105 1848 66 1847 79 1846 79 1845 45 1844 91 1843 117 1842 104 1841 39 1840 118 1839 159 1838 79 1837 119 1836 23 1835 78 1834 103 1833 78 1832 100 1831 118 1830 147 1829 156 1828 53 1827 96 1826 68 1825 55 1824 82 1823 135 1822 147 1821 80 1820 60 1819 67 1818 136 1817 54 1816 149 1815 145 1814 40 1813 145 1812 94 1811 164 1810 109 1809 72 1808 93 1807 120 1806 67 1805 69 1804 55 1803 69 1802 69 1801 55 1800 183 1799 28 1798 142 1797 92 1796 126 1795 112 1794 56 1793 110 1792 55 1791 110 1790 72 1789 175 1788 87 1787 72 1786 86 1785 114 1784 71 1783 14 1782 87 1781 72 1780 58 1779 101 1778 72 1777 72