# SE-Dome ll Ice Core, South Eastern Greenland Accumulation Rate, Melt Crust and Feature, H2O2 and Tritium Concentration, Bulk Density and Electrical Conductivity Data from 1800 to 2020 CE #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. # If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with '#' followed by a space # Data lines have no '#' # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/38404 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-icecore-38404.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Ice Cores # # Dataset_DOI: 10.25921/bx51-ng14 # # Science_Keywords: Glaciers and Ice Sheets Reconstruction #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/icecore/greenland/kawakami2023/kawakami2023-se-dome_depth_year.txt # Data_Download_Description: NOAA Template File; Depth and Year Data # #--------------------------------------- # Contribution_Date # Date: 2023-08-11 #--------------------------------------- # File_Last_Modified_Date # Date: 2023-11-23 #--------------------------------------- # Title # Study_Name: SE-Dome ll Ice Core, South Eastern Greenland Accumulation Rate, Melt Crust and Feature, H2O2 and Tritium Concentration, Bulk Density and Electrical Conductivity Data from 1800 to 2020 CE #--------------------------------------- # Investigators # Investigators: Kawakami, Kaoru(0000-0001-9711-3762); Iizuka, Yoshinori (0000-0001-7241-6062); Sasage, Mahiro; Matsumoto, Mai; Saito, Takeshi; Hori, Akira (0000-0002-5887-905X); Sakiko, Ishino (0000-0002-5897-7063); Fujita, Shuji (0000-0003-0127-0777); Fujita, Koji (0000-0003-3753-4981); Takasugi, Keita; Hatakeyama, Takumi; Hamamoto, Saaya; Watari, Akihisa; Esashi, Nao; Otsuka, Miu; Uemura, Ryu (0000-0002-4236-0085); Horiuchi, Kazuho (0000-0003-3185-8766); Minowa, Masahiro (0000-0003-2667-9798); Hattori, Shohei(0000-0002-4438-5462); Aoki, Teruo (0000-0003-1007-986X); Hirabayashi, Motohiro; Kawamura, Kenji (0000-0003-1163-700X); Matoba, Sumito (0000-0003-2214-4649) #--------------------------------------- # Description_Notes_and_Keywords # Description: #--------------------------------------- # Publication # Authors: Kaoru Kawakami, Yoshinori Iizuka, Mahiro Sasage, Mai Matsumoto, Takeshi Saito, Akira Hori, Sakiko Ishino, Shuji Fujita, Koji Fujita, Keita Takasugi, Takumi Hatakeyama, Saaya Hamamoto, Akihisa Watari, Nao Esashi, Miu Otsuka, Ryu Uemura, Kazuho Horiuchi, Masahiro Minowa, Shohei Hattori, Teruo Aoki, Motohiro Hirabayashi, Kenji Kawamura, Sumito Matoba # Published_Date_or_Year: 2023-10-27 # Published_Title: SE-Dome II ice core dating with half-year precision: Increasing melting events from 1799 to 2020 in southeastern Greenland # Journal_Name: Journal of Geophysical Research: Atmospheres # Volume: 128 # Edition: # Issue: 20 # Pages: # Report_Number: e2023JD038874 # DOI: 10.1029/2023JD038874 # Online_Resource: # Full_Citation: # Abstract: Arctic warming has accelerated surface melting even in the highland areas of the Greenland ice sheet (GrIS). Understanding the relationship between climate and surface melting is essential for improving the estimates of ice-sheet mass loss due to warming. Here we analyze a 250 m-long ice core from the southeastern dome of GrIS (SE-Dome site; 67 19'17" N, 36 47'03" W, 3161 m a.s.l.), where the annual mean temperature is -20.9C and the accumulation rate is high and there is a large discrepancy among climate models regarding snow accumulation estimates. A time scale was established for 1799–2020 with a half-year uncertainty using annual counting of H2O2 concentration and five time horizons determined by electrical conductivity, melt events, and tritium concentration. The annual accumulation rate from the ice core shows no significant trend over 221 years and has an average of 1.04 +/- 0.20 m w.e. yr-1. In contrast, the frequency and thickness of refrozen melt layer have increased over 221 years, and are synchronized with temperature changes in the Arctic. The thickness of the melt layers correlates positively with the time-integrated summer temperature anomaly using a reanalysis of air temperature. The in-situ accumulation records in the southeastern GrIS provide an important basis for correcting reanalysis data such as ERA5, which in turn are valuable for improving regional climate models. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Japan Ministry of Education, Culture, Sports, Science and Technology (MEXT) # Grant: 18H05292, 23H00511, 20K19961, 20H04305, 23K18516 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Arctic Challenge for Sustainability (ArCS II) Project # Grant: JPMXD1420318865 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Institute of Polar Research (NIPR) # Grant: 3-8 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Nanjing Normal University # Grant: #--------------------------------------- # Site_Information # Site_Name: SE-Dome II # Location: Greenland # Northernmost_Latitude: 67.19 # Southernmost_Latitude: 67.19 # Easternmost_Longitude: -36.47 # Westernmost_Longitude: -36.47 # Elevation_m: 3160.7 #--------------------------------------- # Data_Collection # Collection_Name: SE-Dome_depth_year # First_Year: 1799 # Last_Year: 2021 # Time_Unit: year Common Era # Core_Length_m: 250.79 # Parameter_Keywords: accumulation # Notes: #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # ## Depth depth,,,meter,,ice cores,,,N,The depths correspond to minimum and maximum of H2O2 concentration from SE-Dome ll ice core. The minimum and maximum of H2O2 concentration indicate mid-winter and mid-summer. ## Year ice age,,,year Common Era,,ice cores,,,N,A decimal point of 0.468 indicates the mid-summer and 0.973 indicates the mid-winter. #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: Depth Year 1.503 2020.97 2.097 2020.47 3.055 2019.97 3.842 2019.47 5.077 2018.97 5.963 2018.47 6.850 2017.97 7.971 2017.47 9.001 2016.97 10.213 2016.47 10.667 2015.97 11.491 2015.47 12.716 2014.97 13.763 2014.47 14.525 2013.97 15.268 2013.47 15.923 2012.97 16.851 2012.47 17.564 2011.97 18.019 2011.47 18.690 2010.97 19.657 2010.47 20.464 2009.97 21.159 2009.47 22.258 2008.97 23.215 2008.47 23.922 2007.97 24.998 2007.47 25.825 2006.97 26.325 2006.47 26.953 2005.97 27.579 2005.47 28.618 2004.97 29.258 2004.47 30.243 2003.97 30.872 2003.47 32.340 2002.97 33.294 2002.47 34.238 2001.97 34.941 2001.47 35.446 2000.97 36.209 2000.47 37.035 1999.97 37.809 1999.47 38.381 1998.97 38.860 1998.47 39.595 1997.97 40.328 1997.47 41.252 1996.97 42.023 1996.47 42.913 1995.97 43.886 1995.47 44.287 1994.97 44.729 1994.47 45.354 1993.97 46.277 1993.47 47.086 1992.97 47.819 1992.47 48.551 1991.97 49.275 1991.47 50.146 1990.97 51.075 1990.47 51.775 1989.97 52.617 1989.47 53.158 1988.97 53.707 1988.47 54.431 1987.97 54.990 1987.47 55.871 1986.97 56.770 1986.47 57.372 1985.97 57.775 1985.47 58.576 1984.97 59.517 1984.47 60.201 1983.97 60.959 1983.47 61.837 1982.97 62.197 1982.47 62.683 1981.97 63.349 1981.47 63.904 1980.97 64.464 1980.47 65.396 1979.97 65.871 1979.47 66.329 1978.97 66.854 1978.47 67.597 1977.97 68.339 1977.47 68.855 1976.97 69.578 1976.47 70.394 1975.97 71.151 1975.47 71.915 1974.97 72.255 1974.47 72.961 1973.97 73.508 1973.47 74.010 1972.97 74.711 1972.47 75.698 1971.97 76.330 1971.47 76.859 1970.97 77.472 1970.47 78.017 1969.97 78.530 1969.47 79.134 1968.97 79.430 1968.47 79.872 1967.97 80.344 1967.47 80.770 1966.97 81.349 1966.47 81.746 1965.97 82.048 1965.47 82.824 1964.97 83.448 1964.47 84.272 1963.97 84.903 1963.47 85.494 1962.97 85.891 1962.47 86.443 1961.97 86.995 1961.47 87.583 1960.97 88.171 1960.47 89.018 1959.97 89.776 1959.47 90.496 1958.97 91.110 1958.47 91.669 1957.97 92.253 1957.47 92.915 1956.97 93.551 1956.47 94.227 1955.97 94.732 1955.47 95.368 1954.97 95.660 1954.47 96.445 1953.97 97.217 1953.47 98.079 1952.97 98.652 1952.47 99.204 1951.97 99.623 1951.47 100.004 1950.97 100.309 1950.47 100.782 1949.97 101.504 1949.47 102.126 1948.97 102.435 1948.47 103.247 1947.97 103.871 1947.47 104.540 1946.97 105.196 1946.47 105.778 1945.97 106.648 1945.47 107.307 1944.97 107.795 1944.47 108.456 1943.97 108.931 1943.47 109.459 1942.97 109.948 1942.47 110.878 1941.97 111.712 1941.47 112.346 1940.97 112.826 1940.47 113.540 1939.97 114.334 1939.47 114.965 1938.97 115.463 1938.47 116.205 1937.97 116.749 1937.47 117.335 1936.97 117.917 1936.47 118.594 1935.97 118.839 1935.47 119.441 1934.97 119.990 1934.47 120.920 1933.97 121.575 1933.47 122.065 1932.97 122.791 1932.47 123.751 1931.97 124.291 1931.47 124.739 1930.97 125.085 1930.47 125.610 1929.97 126.068 1929.47 126.810 1928.97 127.357 1928.47 127.982 1927.97 128.409 1927.47 128.863 1926.97 129.307 1926.47 129.915 1925.97 130.285 1925.47 130.897 1924.97 131.194 1924.47 131.517 1923.97 131.810 1923.47 132.498 1922.97 133.103 1922.47 133.551 1921.97 134.197 1921.47 134.788 1920.97 135.505 1920.47 135.805 1919.97 136.241 1919.47 136.789 1918.97 137.293 1918.47 137.770 1917.97 138.014 1917.47 138.544 1916.97 139.098 1916.47 139.542 1915.97 140.029 1915.47 140.425 1914.97 141.031 1914.47 141.511 1913.97 142.000 1913.47 142.442 1912.97 143.181 1912.47 143.683 1911.97 144.425 1911.47 145.208 1910.97 145.666 1910.47 146.087 1909.97 146.422 1909.47 146.892 1908.97 147.385 1908.47 148.261 1907.97 148.755 1907.47 149.058 1906.97 149.644 1906.47 150.297 1905.97 150.756 1905.47 151.227 1904.97 151.680 1904.47 151.949 1903.97 152.311 1903.47 152.789 1902.97 153.291 1902.47 153.872 1901.97 154.276 1901.47 154.889 1900.97 155.454 1900.47 155.911 1899.97 156.218 1899.47 156.748 1898.97 157.575 1898.47 158.052 1897.97 158.815 1897.47 159.536 1896.97 160.017 1896.47 160.513 1895.97 161.070 1895.47 161.595 1894.97 162.213 1894.47 162.759 1893.97 163.279 1893.47 163.771 1892.97 164.073 1892.47 164.503 1891.97 164.800 1891.47 165.531 1890.97 165.876 1890.47 166.394 1889.97 166.940 1889.47 167.745 1888.97 168.246 1888.47 168.786 1887.97 169.139 1887.47 169.491 1886.97 169.886 1886.47 170.362 1885.97 170.743 1885.47 171.170 1884.97 171.742 1884.47 172.428 1883.97 173.030 1883.47 173.512 1882.97 174.159 1882.47 174.634 1881.97 175.273 1881.47 175.596 1880.97 175.891 1880.47 176.681 1879.97 177.195 1879.47 177.845 1878.97 178.158 1878.47 178.575 1877.97 178.883 1877.47 179.187 1876.97 179.663 1876.47 180.169 1875.97 180.648 1875.47 181.268 1874.97 181.709 1874.47 182.091 1873.97 182.531 1873.47 183.024 1872.97 183.647 1872.47 184.231 1871.97 184.844 1871.47 185.249 1870.97 185.876 1870.47 186.305 1869.97 186.754 1869.47 187.191 1868.97 187.638 1868.47 188.237 1867.97 189.009 1867.47 189.279 1866.97 189.612 1866.47 189.949 1865.97 190.409 1865.47 190.850 1864.97 191.285 1864.47 191.784 1863.97 192.182 1863.47 192.727 1862.97 193.476 1862.47 193.981 1861.97 194.411 1861.47 194.984 1860.97 195.381 1860.47 195.990 1859.97 196.372 1859.47 196.767 1858.97 197.248 1858.47 197.717 1857.97 198.266 1857.47 198.778 1856.97 199.187 1856.47 199.709 1855.97 200.280 1855.47 200.705 1854.97 201.099 1854.47 201.624 1853.97 202.049 1853.47 202.402 1852.97 202.811 1852.47 203.374 1851.97 203.926 1851.47 204.322 1850.97 204.719 1850.47 205.281 1849.97 205.538 1849.47 206.144 1848.97 206.516 1848.47 206.808 1847.97 207.204 1847.47 207.790 1846.97 208.309 1846.47 208.679 1845.97 209.183 1845.47 209.748 1844.97 210.092 1844.47 210.482 1843.97 210.741 1843.47 211.346 1842.97 211.717 1842.47 212.340 1841.97 212.781 1841.47 213.366 1840.97 213.832 1840.47 214.448 1839.97 214.812 1839.47 215.128 1838.97 215.677 1838.47 216.053 1837.97 216.445 1837.47 216.822 1836.97 217.014 1836.47 217.567 1835.97 217.914 1835.47 218.337 1834.97 218.800 1834.47 219.393 1833.97 219.689 1833.47 220.343 1832.97 221.043 1832.47 221.782 1831.97 222.578 1831.47 223.085 1830.97 223.610 1830.47 223.961 1829.97 224.435 1829.47 224.918 1828.97 225.556 1828.47 226.047 1827.97 226.831 1827.47 227.196 1826.97 227.844 1826.47 228.230 1825.97 228.667 1825.47 229.140 1824.97 229.532 1824.47 230.006 1823.97 230.220 1823.47 230.508 1822.97 231.018 1822.47 231.400 1821.97 231.601 1821.47 232.137 1820.97 232.662 1820.47 233.152 1819.97 233.701 1819.47 234.109 1818.97 234.398 1818.47 234.816 1817.97 235.301 1817.47 235.786 1816.97 236.269 1816.47 236.865 1815.97 237.222 1815.47 237.674 1814.97 238.361 1814.47 238.913 1813.97 239.309 1813.47 239.844 1812.97 240.292 1812.47 240.552 1811.97 241.170 1811.47 241.390 1810.97 241.710 1810.47 242.170 1809.97 242.815 1809.47 243.509 1808.97 243.912 1808.47 244.582 1807.97 244.831 1807.47 245.209 1806.97 245.693 1806.47 246.035 1805.97 246.750 1805.47 247.258 1804.97 247.822 1804.47 248.189 1803.97 248.404 1803.47 248.986 1802.97 249.258 1802.47 249.462 1801.97 249.856 1801.47 250.200 1800.97 250.784 1800.47 251.184 1799.97 251.719 1799.47