# West Antarctic Ice Core 01-2 20th Century Stable Isotope Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original reference 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/cdo/f?p=519:1:::::P1_STUDY_ID:6182 # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/24611 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/west-antarctic-iso2008.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Ice Cores # -------------------- # Contribution_date # Date: 2008 # -------------------- # Title # Study_Name: West Antarctic Ice Core 01-2 20th Century Stable Isotope Data # -------------------- # Investigators # Investigators: Schneider, D.P; Steig, E.J. # -------------------- # Description_and_Notes # Description: Water stable isotope data from high-resolution ice cores from the West Antarctic Ice Sheet. The record is representative of West Antarctic surface temperature. # # Table 1. Summary information for ice core sites. # # Site Name Lat(°N) Lon(°E) Elev(m) Type End yr # Dyer Plateau -70.66 -64.5 2002 d18O 1989 # Siple Station -75.92 -84.15 1054 d18O 1983 # 01-5 ITASE -77.06 -89.14 1239 d18O 1999 # 00-5 ITASE -77.68 -123.99 1828 dD 1999 # 01-2 ITASE -77.84 -102.91 1336 d18O 1999 # 01-3 ITASE -78.12 -95.65 1620 dD 1999 # 00-1 ITASE -79.38 -111.23 1791 dD 1999 # Siple Dome A -81.65 -148.81 615 dD 1993 # -------------------- # Publication # Authors: D.P. Schneider, E.J. Steig # Published_Date_or_Year: 2008-08-12 # Published_Title: Ice cores record significant 1940s Antarctic warmth related to tropical climate variability # Journal_Name: # Volume: # Edition: # Issue: # Pages: # DOI: 10.1073/pnas.0803627105 # Online_Resource: # Full_Citation: # Abstract: Although the 20th Century warming of global climate is well known, climate change in the high-latitude Southern Hemisphere (SH), especially in the first half of the century, remains poorly documented. We present a composite of water stable isotope data from high-resolution ice cores from the West Antarctic Ice Sheet. This record, representative of West Antarctic surface temperature, shows extreme positive anomalies in the 1936–45 decade that are significant in the context of the background 20th Century warming trend. We interpret these anomalies - previously undocumented in the high-latitude SH - as indicative of strong teleconnections in part driven by the major 1939–42 El Niño. These anomalies are coherent with tropical sea-surface temperature, mean SH air temperature, and North Pacific sea-level pressure, underscoring the sensitivity of West Antarctica's climate, and potentially its ice sheet, to large-scale changes in the global climate.ith phase variation of <1 month. Dating precision and accuracy are uniform with depth, for at least the last 100 years. # -------------------- # Authors: Anderson, D.M., Tardif, R., Horlick, K., Erb, M.P., Hakim, G.J., Noone, D., Perkins, W.A., and E. Steig # Published_Date_or_Year: 2018 # Published_Title: Additions to the last millennium reanalysis multi-proxy database # Journal_Name: Data Science Journal # Volume: # Edition: # Issue: # Pages: # Report_Number: # DOI: # Online_Resource: # Full_Citation: Anderson, D.M., Tardif, R., Horlick, K., Erb, M.P., Hakim, G., J., Noone, D., Perkins, W.A., and E. Steig, submitted. Additions to the last millennium reanalysis multi-proxy database. Data Science Journal. # Abstract: Progress in paleoclimatology increasingly occurs via data syntheses. We describe additions to a collection prepared for use in paleoclimate state estimation, specifically the Last Millennium Reanalysis (LMR). The 2290 additional series include 2152 tree ring chronologies and 138 other series. They supplement the collection used previously and together form a database titled LMRdb 1.0.0. The additional data draws from lake core, ice core, coral, speleothem, and tree ring archives, using published data primarily from the NOAA Paleoclimatology archive and a set of tree ring width chronologies standardized from raw International Tree Ring Data Bank ring width series. In contrast to many previous paleo compilations, the data were not selected (screened) on the basis of their environmental correlation, multi-century length, or other attributes. The inclusion of proxies sensitive to moisture and other environmental variables expands their use in data assimilation. A preliminary calibration using linear regression with mean annual temperature reveals characteristics of the proxy series and their relationship to temperature, as well as the noise and error characteristics of the records. The additional records are structured as individual files in the NOAA Paleoclimatology format and archived at NOAA Paleoclimatology (Anderson et al. 2018) and will continue to be improved and expanded as part of the LMR Project. The additions represent a four-fold increase in the number of records available for assimilation, provide expanded geographic coverage, and add additional proxy variables. Applications include data assimilation, proxy system model development, and paleoclimate reconstruction using climate field reconstruction and other methods. #------------------ # Funding_Agency # Funding_Agency_Name: United States National Science Foundation, Office of Polar Programs # Funding_Agency # Funding_Agency_Name: National Center for Atmospheric Research # # -------------------- # Funding_Agency_Name: National Science Foundation # Grant:AGS-1304263 # Funding_Agency_Name: National Oceanic and Atmospheric Administration # Grant:NA14OAR4310176 #------------------ # Site_Information # Site_Name: US ITASE 01-2 # Location: Antarctica # Country: # Northernmost_Latitude: -77.84 # Southernmost_Latitude: -77.84 # Easternmost_Longitude: -102.91 # Westernmost_Longitude: -102.91 # Elevation: 1336 m # -------------------- # Data_Collection # Collection_Name: 08ITAS02 # Earliest_Year: 1900 # Most_Recent_Year: 1999 # Time_Unit: y_ad # Notes: {"database":"LMR"} # # -------------------- # Variables # # Data variables follow that are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ##age age,,,years AD,,,,,N ##d18O delta 18 oxygen,,,permil SMOW,,Ice Cores,,,N # # -------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing values: NAN # age d18O 1999 -30.044 1998 -29.188 1997 -30.848 1996 -30.094 1995 -29.721 1994 -29.207 1993 -28.485 1992 -30.928 1991 -31.129 1990 -28.672 1989 -29.917 1988 -30.459 1987 -28.926 1986 -30.593 1985 -30.704 1984 -29.902 1983 -28.498 1982 -29.552 1981 -29.594 1980 -30.15 1979 -28.234 1978 -31.288 1977 -28.868 1976 -29.908 1975 -30.53 1974 -31.264 1973 -29.124 1972 -30.042 1971 -31.613 1970 -30.881 1969 -28.562 1968 -29.08 1967 -30.937 1966 -31.04 1965 -30.351 1964 -30.271 1963 -29.836 1962 -29.766 1961 -29.769 1960 -29.761 1959 -30.271 1958 -31.454 1957 -29.687 1956 -29.91 1955 -29.773 1954 -29.855 1953 -30.249 1952 -30.883 1951 -30.709 1950 -29.889 1949 -29.258 1948 -28.342 1947 -28.649 1946 -29.914 1945 -29.969 1944 -27.783 1943 -26.617 1942 -28.7 1941 -29.576 1940 -30.246 1939 -29.858 1938 -28.815 1937 -28.891 1936 -30.297 1935 -30.804 1934 -30.052 1933 -30.072 1932 -30.682 1931 -29.471 1930 -29.136 1929 -28.9 1928 -30.569 1927 -30.288 1926 -30.119 1925 -29.232 1924 -29.565 1923 -29.623 1922 -29.202 1921 -30.046 1920 -29.954 1919 -29.503 1918 -30.046 1917 -28.857 1916 -28.472 1915 -28.961 1914 -28.156 1913 -29.342 1912 -31.136 1911 -31.771 1910 -32.439 1909 -28.973 1908 -28.48 1907 -30.578 1906 -29.224 1905 -28.396 1904 -29.129 1903 -30.228 1902 -28.413 1901 -29.627 1900 -29.569