# West Antarctic Ice Core 01-5 ITASE 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 01-5 ITASE 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 and 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: Proceedings of the National Academy of Sciences # 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. # -------------------- # 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: 01-5 ITASE # Location: Antarctica # Country: # Northernmost_Latitude: -77.06 # Southernmost_Latitude: -77.06 # Easternmost_Longitude: -89.14 # Westernmost_Longitude: -89.14 # Elevation: 1239 m # -------------------- # Data_Collection # Collection_Name: 08ITAS01 # 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 -30.38 1998 -30.681 1997 -32.502 1996 -32.763 1995 -32.264 1994 -31.751 1993 -31.034 1992 -30.173 1991 -31.109 1990 -31.038 1989 -31.363 1988 -30.821 1987 -31.47 1986 -30.375 1985 -30.185 1984 -31.764 1983 -32.32 1982 -33.751 1981 -30.389 1980 -31.056 1979 -31.085 1978 -30.954 1977 -32.396 1976 -31.891 1975 -30.501 1974 -30.113 1973 -29.646 1972 -31.926 1971 -30.764 1970 -31.917 1969 -32.989 1968 -33.053 1967 -31.128 1966 -30.641 1965 -31.839 1964 -31.986 1963 -31.993 1962 -31.865 1961 -32.595 1960 -31.305 1959 -32.354 1958 -31.275 1957 -32.086 1956 -32.608 1955 -33.262 1954 -32.705 1953 -31.451 1952 -31.866 1951 -30.704 1950 -31.138 1949 -31.327 1948 -32.166 1947 -32.117 1946 -31.375 1945 -29.574 1944 -30.957 1943 -34.047 1942 -32.167 1941 -29.213 1940 -31.294 1939 -30.614 1938 -31.017 1937 -32.694 1936 -30.978 1935 -31.129 1934 -31.676 1933 -31.011 1932 -32.266 1931 -32.526 1930 -32.219 1929 -33.75 1928 -32.178 1927 -32.635 1926 -30.687 1925 -31.65 1924 -30.924 1923 -30.526 1922 -30.265 1921 -32.257 1920 -31.741 1919 -32.126 1918 -31.611 1917 -31.115 1916 -31.722 1915 -32.169 1914 -33.926 1913 -31.855 1912 -30.826 1911 -32.091 1910 -32.107 1909 -31.88 1908 -32.982 1907 -34.125 1906 -34.049 1905 -31.907 1904 -30.163 1903 -34.175 1902 -32.721 1901 -31.368 1900 -32.705