# Guadalcanal Coral Radiocarbon Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # 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/1902 # # Original_Source_URL: http://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/marau2004.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Corals and Sclerosponges #-------------------- # Contribution_Date # Date: 2004-12-01 #-------------------- # Title # Study_Name: Marau Sound, Guadalcanal - Radiocarbon and d13C Data #-------------------- # Investigators # Investigators: Schmidt, A.; Burr, G.S.; Taylor, F.W.; O'Malley, J.; Beck, J.W. #-------------------- # Description_and_Notes # Description: #-------------------- # Publication # Authors: Schmidt, A.; Burr, G.S.; Taylor, F.W.; O'Malley, J.; Beck, J.W. # Published_Date_or_Year: 2004 # Published_Title: A semiannual radiocarbon record of a modern coral from the Solomon Islands. # Journal_Name: Nuclear Instruments and Methods in Physics Research B # Volume: 223-24 # Edition: # Issue: # Pages: 420-427 # DOI: # Online_Resource: # Full_Citation: Schmidt, A., G.S. Burr, F.W. Taylor, J. O'Malley, and J.W. Beck. 2004. A semiannual radiocarbon record of a modern coral from the Solomon Islands. Nuclear Instruments and Methods in Physics Research B, 223-24:420-427. # Abstract: Radiocarbon records from modern corals have long been recognized for their usefulness as a geochemical tracer of surface ocean waters and oceanic upwelling. Pacific corals are especially interesting because of their potential relevance to El Niño - Southern Oscillation (ENSO) events. At present, the Pacific Ocean is undersampled with respect to radiocarbon time series. This study establishes a 14C time series for a coral from the Solomon Islands, located near the center of the Western Pacific Warm Pool (WPWP). We present radiocarbon results from a Porites colony which grew in Marau Sound, on the east coast of Guadalcanal. A semiannual record of 14C was constructed from measurements of alternating bands which grew continuously from 1944 to 1994. The record reflects the uptake of atmospheric bomb-produced 14C since the late 1950s with superimposed subannual radiocarbon variations, presumably related to changes in ocean circulation. Although the coral radiocarbon is influenced by ENSO events, the record is not closely correlated with the Southern Oscillation Index (SOI) for the same period. #------------------ # Funding_Agency # Funding_Agency_Name: # Grant: #------------------ # Site_Information # Site_Name: Marau Sound, Guadalcanal, Solomon Islands # Location: Ocean>Pacific Ocean>South Pacific Ocean>Melanesia>Solomon Islands # Country: Solomon Islands # Northernmost_Latitude: -9.83 # Southernmost_Latitude: -9.83 # Easternmost_Longitude: 160.83 # Westernmost_Longitude: 160.83 # Elevation: -2 m #------------------ # Data_Collection # Collection_Name: 04solo01a # Earliest_Year: 1944 # Most_Recent_Year: 1994 # Time_Unit: AD # Core_Length: # Notes: #------------------ # Species # Species_Name: Porites sp. # Common_Name: #------------------ # Chronology_Information # Chronology: # #---------------- # 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 ##fmod 14C, Porites sp., , fraction of modern value, , corals and sclerosponges, , ,N ##fmod_err 14C, Porites sp., one standard deviation, fraction of modern value, , corals and sclerosponges, , ,N ##d14C Delta 14C, Porites sp., , permil, , corals and sclerosponges, , ,N ##d14C_err Delta 14C, Porites sp., one standard deviation, permil, , corals and sclerosponges, , , N ##d13C delta 13C, Porites sp., , permil, , corals and sclerosponges, , ,N ##notes notes, , , , , , , , C # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: NAN # age fmod fmod_err d14C d14Cerr d13C notes 1994 1.0989 0.0055 104.8 5.5 -1.9 1993.5 1.0991 0.0051 104.9 5.1 -1.8 1993 1.0985 0.0066 104.2 6.6 -1.0 delta 13C assumed value 1992.5 1.0929 0.0060 98.5 6.0 -1.0 delta 13C assumed value 1992 1.1030 0.0076 108.6 7.6 -1.0 delta 13C assumed value 1991.5 1.0920 0.0055 97.5 5.5 -1.3 1991 1.1046 0.0053 110.1 5.3 -1.4 1990.5 1.1122 0.0052 117.7 5.2 -1.0 1990 1.1027 0.0054 108.0 5.4 -1.0 delta 13C assumed value 1989.5 1.1120 0.0055 117.3 5.5 -1.0 delta 13C assumed value 1989 1.1083 0.0051 113.5 5.1 -1.0 delta 13C assumed value 1988.5 1.1086 0.0055 113.8 5.5 -1.0 delta 13C assumed value 1988 1.0994 0.0049 104.5 4.9 -1.0 delta 13C assumed value 1987.5 1.1199 0.0057 125.0 5.7 -1.0 delta 13C assumed value 1987 1.1107 0.0063 122.7 6.3 -1.0 delta 13C assumed value 1986.5 1.1071 0.0049 110.9 4.9 -1.0 delta 13C assumed value 1986 1.1164 0.0049 121.3 4.9 -1.8 1985.5 1.1254 0.0049 130.2 4.9 -1.3 1985 1.1081 0.0050 112.8 5.0 -1.4 1984.5 1.1129 0.0049 117.6 4.9 -1.7 1984 1.1197 0.0049 124.3 4.9 -1.0 1983.5 1.1199 0.0045 124.4 4.5 -2.1 1983 1.1229 0.0049 127.4 4.9 -1.0 delta 13C assumed value 1982.5 1.1230 0.0059 127.4 5.9 -1.5 1982 1.1119 0.0049 116.2 4.9 -1.0 delta 13C assumed value 1981.5 1.1193 0.0052 123.6 5.2 -1.2 1981 1.1206 0.0075 124.8 7.5 -1.6 1980.5 1.1195 0.0062 123.6 6.2 -1.0 1980 1.1092 0.0042 113.2 4.2 -1.4 1979.5 1.1116 0.0044 115.6 4.4 -1.7 1979 1.1090 0.0061 112.9 6.1 -1.7 1978.5 1.1135 0.0054 117.3 5.4 -1.0 1978 1.1125 0.0062 116.3 6.2 -1.4 1977.5 1.1315 0.0068 135.3 6.8 -1.3 1977 1.1252 0.0056 128.9 5.6 -1.4 1976.5 1.1304 0.0080 134.0 8.0 -0.8 1976 1.1166 0.0056 120.1 5.6 -1.8 1975.5 1.1180 0.0059 121.5 5.9 -0.9 1975 1.1167 0.0068 120.1 6.8 -0.9 1974.5 1.1207 0.0062 124.0 6.2 -1.0 1974 1.1077 0.0058 110.9 5.8 -1.0 1973.5 1.1093 0.0094 112.5 9.4 -1.0 1973 1.0890 0.0054 92.0 5.4 -1.2 1972.5 1.1022 0.0048 105.2 4.8 -1.0 1972 1.1068 0.0049 109.7 4.9 -1.1 1971.5 1.0863 0.0090 89.1 9.0 -1.3 1971 1.0849 0.0056 87.7 5.6 -1.1 1970.5 1.0809 0.0049 83.6 4.9 -0.8 1970 1.0836 0.0049 86.2 4.9 -1.2 1969.5 1.0766 0.0055 79.1 5.5 -0.4 1968.5 1.0601 0.0054 62.5 5.4 -1.4 1968 1.0506 0.0062 52.9 6.2 -1.5 1967.5 1.0684 0.0054 70.7 5.4 -1.1 1967 1.0627 0.0074 64.9 7.4 -1.2 1966.5 1.0623 0.0055 64.4 5.5 -0.6 1966 1.0518 0.0054 53.8 5.4 -1.5 1965.5 1.0352 0.0086 37.1 8.6 -1.5 1965 1.0443 0.0053 46.2 5.3 -1.9 1964.5 1.0377 0.0071 39.5 7.1 -1.0 1964 1.0241 0.0053 25.8 5.3 -2.2 1963.5 1.0188 0.0038 20.5 3.8 -2.6 1963 1.0144 0.0054 16.0 5.4 -1.7 1962.5 1.0163 0.0047 17.8 4.7 -1.3 1962 1.0040 0.0052 5.5 5.2 -2.0 1961.5 1.0030 0.0037 4.4 3.7 -0.8 1961 0.9784 0.0048 -20.3 4.8 -1.0 1960.5 0.9782 0.0036 -20.6 3.6 -1.5 1960 0.9744 0.0036 -24.4 3.6 -2.8 1959.5 0.9811 0.0060 -17.8 6.0 -3.1 1959 0.9764 0.0036 -22.5 3.6 -2.6 1958.5 0.9885 0.0046 -10.5 4.6 -2.6 1958 0.9767 0.0036 -22.4 3.6 -1.2 1957.5 0.9677 0.0036 -31.4 3.6 -2.0 1957 0.9678 0.0036 -31.4 3.6 -1.3 1956.5 0.9585 0.0036 -40.7 3.6 -1.7 1956 0.9527 0.0065 -46.6 6.5 -1.1 1955.5 0.9487 0.0037 -50.7 3.7 -1.1 1955 0.9417 0.0048 -57.7 4.8 -0.5 1954.5 0.9417 0.0038 -57.8 3.8 -0.7 1954 0.9483 0.0051 -51.2 5.1 -1.0 1953.5 0.9374 0.0048 -62.2 4.8 -1.0 1953 0.9467 0.0049 -53.0 4.9 -1.3 1952.5 0.9428 0.0049 -56.9 4.9 -1.6 1952 0.9467 0.0049 -53.1 4.9 -1.3 1951.5 0.9436 0.0065 -56.2 6.5 -1.5 1951 0.9433 0.0059 -56.6 5.9 -1.9 1950.5 0.9416 0.0047 -58.3 4.7 -1.1 1950 0.9505 0.0058 -49.5 5.8 -1.5 1949.5 0.9390 0.0049 -69.2 4.9 -1.4 1949 0.9497 0.0050 -50.4 5.0 -1.1 1948.5 0.9370 0.0075 -63.2 7.5 -1.6 1948 0.9376 0.0052 -62.6 5.2 -1.4 1947.5 0.9352 0.0055 -65.1 5.5 -1.2 1947 0.9417 0.0056 -58.6 5.6 -1.3 1946.5 0.9306 0.0089 -69.8 8.9 -1.2 1946 0.9378 0.0047 -62.7 4.7 -1.4 1945.5 0.9343 0.0061 -66.2 6.1 -1.3 1945 0.9359 0.0050 -64.7 5.0 -1.8 1944.5 0.9357 0.0070 -64.9 7.0 -1.8 1944 0.9344 0.0055 -66.3 5.5 -2.7