Fanning Island 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: Fanning Island Coral Radiocarbon Data LAST UPDATE: 1/2004 (Original Receipt by WDC Paleo) CONTRIBUTOR: Andrea Grottoli, University of Pennsylvania IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2004-004 SUGGESTED DATA CITATION: Grottoli, A.G., et al., 2004, Fanning Island Coral Radiocarbon Data, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2004-004. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCES: Grottoli A.G., Gille S.T., Druffel E.R.M., Dunbar R.B. 2003. Decadal timescale shift in the 14C record of a central equatorial Pacific coral. Radiocarbon 45(1): 91-99 GEOGRAPHIC REGION: Central equatorial Pacific PERIOD OF RECORD: 1922 - 1956 AD DESCRIPTION: We measured d14C by accelerator mass spectrometry from 1922-1956 at near-monthly resolution in a Porites sp. coral skeleton (FI5A) from the windward side of Fanning Island (3 deg 54'32"N, 159 deg 18'88"W). ABSTRACT: Coral skeletal radiocarbon records reflect seawater d14C and are useful for reconstructing the history of water mass movement and ventilation in the tropical oceans. Here, we reconstructed the inter-annual variability in central equatorial Pacific surface water d14C from 1922-1956 using near-monthly radiocarbon measurements in a Porites sp. coral skeleton (FI5A) from the windward side of Fanning Island (3 deg 54'32"N, 159 deg 18'88"W). The most pronounced feature in this record is a large positive shift in d14C between 1947 and 1956 that coincides with the switch of the Pacific Decadal Oscillation (PDO) from a positive to a negative phase in the mid-1940s. Although the absolute d14C values from 1950 - 1955 in FI5A differ from the d14C values of another coral core collected from the opposite side of the island, both records show a large positive shift in their d14C records at that time. The relative increase in d14C of each record is consistent with the premise that a common mechanism is controlling the d14C records within each coral record. Overall, the Fanning d14C data support the notion that a significant amount of subtropical seawater is arriving at the equator but does not allow us to determine the mechanism for its transport. DATA: Year d14C 1922.74 -59.235 1922.86 -52.676 1922.98 -55.264 1923.09 -54.327 1923.21 -53.037 1923.33 -50.717 1923.45 -54.267 1923.57 -64.915 1923.68 -59.009 1923.8 -58.222 1923.92 -46.597 1924.04 -51.225 1924.15 -55.05 1924.27 -54.64 1924.38 -51.464 1924.47 -52.277 1924.56 -48.468 1924.65 -55.307 1924.74 -49.971 1924.83 -55.328 1924.92 -49.722 1925.01 -55.988 1925.1 -47.736 1925.19 -54.823 1925.28 -56.584 1925.4 -56.096 1925.54 -54.307 1925.69 -53.685 1925.83 -51.189 1925.97 -59.626 1926.12 -57.132 1926.26 -56.016 1926.38 -52.096 1926.49 -45.812 1926.59 -49.465 1926.7 -50.433 1926.8 -51.977 1926.91 -56.368 1927.01 -45.65 1927.12 -49.473 1927.22 -52.754 1927.33 -52.343 1927.51 -58.202 1927.57 -49.925 1927.68 -58.361 1927.8 -57.327 1927.92 -57.185 1928.04 -61.37 1928.15 -55.708 1928.27 -58.027 1928.38 -60.948 1928.49 -44.727 1928.59 -58.164 1928.7 -54.467 1928.8 -52.574 1928.91 -59.604 1929.01 -56.508 1929.12 -54.415 1929.22 -51.92 1929.33 -55.642 1929.44 -56.827 1929.54 -60.528 1929.65 -56.48 1929.75 -57.141 1929.86 -54.61 1929.97 -61.127 1930.07 -54.022 1930.18 -64.961 1930.28 -51.463 1930.39 -60.664 1930.49 -46.954 1930.6 -53.481 1930.71 -53.184 1930.81 -49.697 1930.92 -55.727 1931.02 -53.931 1931.13 -64.968 1931.23 -51.606 1931.34 -54.518 1931.45 -56.986 1931.55 -69.025 1931.66 -54.404 1931.76 -57.924 1931.87 -53.957 1931.98 -46.423 1932.08 -49.853 1932.19 -59.097 1932.29 -56.181 1932.39 -54.08 1932.5 -51.78 1932.61 -62.329 1932.72 -55.127 1932.83 -64.048 1932.94 -58.359 1933.05 -59.374 1933.16 -56.631 1933.27 -58.096 1933.39 -58.009 1933.5 -56.825 1933.61 -61.838 1933.72 -55.041 1933.83 -51.803 1933.94 -54.064 1934.05 -56.983 1934.16 -66.914 1934.27 -55.505 1934.38 -52.947 1934.47 -55.026 1934.56 -57.128 1934.65 -51.14 1934.74 -51.851 1934.83 -61.05 1934.92 -52.053 1935.01 -50.781 1935.1 -58.927 1935.19 -55.192 1935.28 -63.54 1935.39 -56.868 1935.52 -46.614 1935.64 -61.448 1935.77 -54.953 1935.89 -55.289 1936.02 -52.926 1936.14 -54.516 1936.27 -58.328 1936.38 -57.022 1936.49 -54.92 1936.7 -48.695 1936.8 -67.372 1936.91 -47.893 1937.01 -49.799 1937.12 -61.439 1937.22 -60.049 1937.33 -58.94 1937.44 -59.923 1937.55 -49.57 1937.66 -55.426 1937.77 -59.009 1937.89 -58.722 1938 -56.431 1938.11 -58.797 1938.22 -48.745 1938.33 -58.539 1938.47 -55.083 1938.62 -50.393 1938.76 -49.709 1938.9 -42.603 1938.97 -55.242 1939.19 -45.082 1939.33 -44.868 1939.44 -55.795 1939.55 -51.094 1939.66 -65.132 1939.77 -50.134 1939.89 -55.745 1940 -53.513 1940.11 -47.06 1940.22 -60.549 1940.33 -50.039 1940.46 -53.378 1940.58 -47.215 1940.71 -52.335 1940.83 -61.86 1940.96 -50.781 1941.08 -69.757 1941.21 -66.908 1941.33 -43.297 1941.43 -50.416 1941.52 -60.537 1941.62 -56.854 1941.71 -38.937 1941.81 -56.235 1941.9 -58.788 1942 -58.075 1942.09 -60.502 1942.19 -49.852 1942.28 -55.819 1942.39 -62.278 1942.51 -50.029 1942.62 -52.965 1942.74 -55.571 1942.86 -47.625 1942.98 -61.803 1943.09 -50.547 1943.21 -60.629 1943.33 -57.029 1943.46 -52.25 1943.58 -58.105 1943.71 -58.912 1943.83 -56.396 1943.96 -71.121 1944.08 -64.73 1944.21 -61.691 1944.33 -60.82 1944.43 -50.661 1944.53 -58.491 1944.63 -60.1 1944.73 -57.199 1944.83 -59.812 1944.93 -49.717 1945.03 -58.934 1945.13 -57.245 1945.23 -62.359 1945.33 -59.769 1945.43 -59.96 1945.53 -54.139 1945.63 -54 1945.73 -56.968 1945.83 -61.187 1945.93 -59.437 1946.03 -65.942 1946.13 -63.462 1946.23 -54.069 1946.33 -55.156 1946.5 -51.488 1946.66 -47.516 1946.83 -41.768 1947 -45.803 1947.16 -49.874 1947.33 -51.294 1947.45 -49.262 1947.57 -43.418 1947.68 -39.631 1947.8 -41.345 1947.92 -37.858 1948.04 -43.123 1948.15 -35.885 1948.27 -37.225 1948.38 -26.13 1948.49 -38.429 1948.59 -26.878 1948.7 -26.947 1948.8 -33.26 1948.91 -29.466 1949.01 -31.006 1949.12 -30.087 1949.22 -44.31 1949.33 -44.323 1949.46 -50.32 1949.6 -47.954 1949.73 -44.469 1949.86 -49.884 1950 -33.133 1950.13 -18.415 1950.26 -33.621 1950.38 -28.545 1950.48 -40.956 1950.58 -26.068 1950.68 -34.479 1950.78 -28.792 1950.88 -37.003 1950.98 -30.915 1951.08 -16.982 1951.18 -21.04 1951.28 -34.05 1951.39 -39.361 1951.5 -39.474 1951.61 -40.187 1951.72 -37.748 1951.83 -38.013 1951.94 -30.128 1952.05 -41.711 1952.16 -44.15 1952.27 -43.763 1952.39 -43.576 1952.51 -28.304 1952.62 -33.907 1952.74 -35.12 1952.86 -31.635 1952.98 -36.447 1953.09 -39.859 1953.21 -33.875 1953.33 -33.589 1953.46 -36.303 1953.58 -39.396 1953.71 -45.628 1953.83 -51.839 1953.96 -47.356 1954.08 -47.87 1954.21 -45.985 1954.33 -47.799 1954.47 -41.319 1954.62 -46.233 1954.76 -45.949 1954.9 -32.774 1955.04 -41.935 1955.19 -45.199 1955.33 -42.617 1955.46 -38.523 1955.58 -41.547 1955.71 -37.265 1955.83 -48.471 1955.96 -37.793 1956.08 -37.908 1956.21 -43.218