Guadalcanal Coral Radiocarbon Data --------------------------------------------------------------------- NOAA Paleoclimatology Program and World Data Center for Paleoclimatology, Boulder --------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Guadalcanal Coral Radiocarbon Data LAST UPDATE: 12/2004 (Original Receipt by WDC Paleo) CONTRIBUTORS: G.S. Burr, A. Schmidt, F.W. Taylor, J.W. Beck IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2004-094 SUGGESTED DATA CITATION: Schmidt, A. et al. 2004. Guadalcanal Coral Radiocarbon Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2004-094. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: 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. GEOGRAPHIC REGION: Western Pacific Warm Pool PERIOD OF RECORD: 1950-1994 AD DESCRIPTION: Guadalcanal Coral Radiocarbon Data Porites sampled in Marau Sound, Guadalcanal, Solomon Islands. 9 deg. 50 min. S, 160 deg. 50 min. E, 2 m. water depth. This dataset contains calibrated AMS radiocarbon measurements from a Poites coral. There are 2 measurements per year for the period 1950 to 1994. DATA: Year F d14C (per mil) d13C (per mil) 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) 1992.5 1.0929 ± 0.0060 98.5 ± 6.0 (-1.0) 1992 1.1030 ± 0.0076 108.6 ± 7.6 (-1.0) 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 1990 1.1027 ± 0.0054 108.0 ± 5.4 (-1.0) 1989.5 1.1120 ± 0.0055 117.3 ± 5.5 (-1.0) 1989 1.1083 ± 0.0051 113.5 ± 5.1 (-1.0) 1988.5 1.1086 ± 0.0055 113.8 ± 5.5 (-1.0) 1988 1.0994 ± 0.0049 104.5 ± 4.9 (-1.0) 1987.5 1.1199 ± 0.0057 125.0 ± 5.7 (-1.0) 1987 1.1107 ± 0.0063 122.7 ± 6.3 (-1.0) 1986.5 1.1071 ± 0.0049 110.9 ± 4.9 (-1.0) 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 1983.5 1.1199 ± 0.0045 124.4 ± 4.5 -2.1 1983 1.1229 ± 0.0049 127.4 ± 4.9 (-1.0) 1982.5 1.1230 ± 0.0059 127.4 ± 5.9 -1.5 1982 1.1119 ± 0.0049 116.2 ± 4.9 (-1.0) 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 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 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 1974 1.1077 ± 0.0058 110.9 ± 5.8 -1 1973.5 1.1093 ± 0.0094 112.5 ± 9.4 -1 1973 1.0890 ± 0.0054 92.0 ± 5.4 -1.2 1972.5 1.1022 ± 0.0048 105.2 ± 4.8 -1 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 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 1961.5 1.0030 ± 0.0037 4.4 ± 3.7 -0.8 1961 0.9784 ± 0.0048 -20.3 ± 4.8 -1 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 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 1953.5 0.9374 ± 0.0048 -62.2 ± 4.8 -1 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