Montego Bay Sclerosponge Carbon Isotope Data --------------------------------------------------------------------- NOAA Paleoclimatology Program and World Data Center for Paleoclimatology, Boulder --------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Caribbean Sclerosponge Carbon Isotope Data LAST UPDATE: 4/2002 (Original Receipt by WDC Paleo) CONTRIBUTORS: Florian Böhm, Alexandra Haase-Schramm, Anton Eisenhauer, Michael Joachimski, Wolf-Christian Dullo, Joachim Reitner, Helmut Lehnert IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2002-020 SUGGESTED DATA CITATION: Böhm, F. et al., 2002, Caribbean Sclerosponge Carbon Isotope Data, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2002-020. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCES: Böhm, F., A. Haase-Schramm, A. Eisenhauer, W.-C. Dullo, M. M. Joachimski, H. Lehnert, and J. Reitner, 2002, Evidence for preindustrial variations in the marine surface water carbonate system from coralline sponges, Geochem. Geophys. Geosyst., 3(3), 10.1029/2001GC000264. http://g-cubed.org/gc2002/2001GC000264/ Böhm, F., Joachimski, M.M., Lehnert, H., Morgenroth, W., Kretschmer, J., Vacelet, J., Dullo, W.-Chr. (1996): Carbon isotope records from extant Caribbean and South Pacific sponges: Evolution of d13C in surface water DIC. Earth Planet. Sci. Lett., 139, 291-303 GEOGRAPHIC REGION: Caribbean Sea; Jamaica and Pedro Bank PERIOD OF RECORD: 1368 - 1995 AD LIST OF FILES: montego_bay_2002.txt, rio_bueno_2002.txt, pedro_bank_2002.txt. DESCRIPTION: Carbon isotope values of sclerosponges (Ceratoporella nicholsoni) from Jamaica (Rio Bueno 18.48N, 77.45W, 20m Depth, and Montego Bay, 18.47N, 77.95W, 20m Depth) and Pedro Bank (17.53N, 78.95W, 125m Depth). Montego Bay, Jamaica: Samples Ce96-1, Ce95-2 (two transects) Rio Bueno, Jamaica: Sample Ce145 Pedro Bank: Samples 392-19 Carbon isotope values were measured on aragonitic skeletons of sclerosponges (Ceratoporella nicholsoni). Carbon isotopes are incorporated in the skeleton in isotopic quasi-equilibrium with sea water. Therefore the values can be used as proxy for the carbon isotopic composition of dissolved inorganic carbon of Caribbean seawater. The skeletal layers were dated by Uranium-Thorium method. The resulting age model has an accuracy of +/-3 percent. ABSTRACT: Coralline sponge skeletons are excellent tools for reconstructing the carbon isotope history of dissolved inorganic carbon (DIC) in tropical surface waters. Carbon isotope records from coralline sponges clearly reflect the industrial 12C increase in atmospheric CO2 with a precision that permits quantitative interpretations. We find from a set of d13C records of four Caribbean sponge specimens that the isotopic response of surface water DIC to the changing isotopic composition of atmospheric CO2 varied dynamically during the last century, depending on the rate of atmospheric change. Three of our sponges provide 600 year long d13C records. For the first time, we can reconstruct surface water d13CDIC for the full history of the industrial CO2 release as well as the preceding preindustrial period back to the beginning of the Little Ice Age. This provides a well-founded estimate of the anthropogenically uninfluenced, preindustrial background level of surface water 13C/12C ratios. Our records show small but systematic variations that appear to be linked to the climate fluctuations of the Little Ice Age. DATA: 1. Core CE95-2, transect 1 Year AD d13C 1994 3.92 1993 3.98 1986 4.09 1986 4.05 1981 4.13 1974 4.24 1970 4.38 1970 4.24 1965 4.44 1959 4.53 1959 4.40 1952 4.48 1945 4.52 1945 4.59 1936 4.57 1923 4.69 1923 4.62 1916 4.64 1911 4.59 1906 4.77 1906 4.72 1898 4.75 1892 4.88 1886 4.86 1884 4.80 1880 4.80 1879 4.79 1871 4.83 1836 4.95 1824 4.93 1824 4.93 1814 4.94 1804 4.84 1802 4.93 1796 4.93 1795 4.95 1790 5.03 1782 4.93 1781 5.05 1771 4.99 1770 5.03 1770 4.98 1765 5.03 1763 4.95 1762 5.03 1762 4.98 1762 5.03 1761 5.00 1755 4.94 1753 4.92 1753 5.02 1751 5.07 1746 5.01 1742 4.99 1735 4.94 1732 5.02 1726 5.02 1689 5.05 1684 4.96 1684 5.05 1680 5.05 1676 4.93 1671 5.03 1667 4.96 1667 5.05 1663 5.05 1655 5.02 1651 4.98 1650 5.08 1650 5.08 1641 5.02 1637 4.99 1618 5.00 1606 5.01 1574 5.03 1574 4.99 1559 4.99 1553 5.01 1543 4.95 1531 4.96 1524 4.95 1524 4.88 1512 4.95 1512 4.94 1508 4.92 1504 4.92 1493 4.91 1492 4.95 1492 4.95 1478 4.92 1477 4.91 1468 4.95 1464 4.93 1456 4.91 1449 4.94 1449 4.90 1449 4.86 1432 4.91 1421 4.93 2. Core CE95-2, transect 2 Year AD d13C 1993 3.90 1992 3.88 1989 3.94 1986 4.04 1983 4.15 1980 4.16 1976 4.19 1973 4.26 1970 4.36 1968 4.34 1964 4.43 1961 4.36 1959 4.45 1956 4.41 1953 4.45 1951 4.49 1948 4.51 1944 4.54 1942 4.57 1938 4.57 1936 4.60 1933 4.56 1930 4.59 1927 4.54 1924 4.55 1921 4.53 1918 4.57 1915 4.63 1912 4.68 1909 4.63 1906 4.69 1904 4.69 1901 4.69 1898 4.71 1896 4.64 1891 4.71 1889 4.78 1695 4.92 1693 4.96 1690 4.92 1688 4.94 1685 4.86 1683 4.96 1680 4.93 1678 4.95 1675 4.94 1673 4.95 1671 4.92 1668 4.92 1666 4.89 1664 4.94 1661 4.91 1659 4.93 1657 4.95 1655 4.96 1653 4.93 1462 4.80 1455 4.85 1452 4.75 1445 4.80 1442 4.77 1439 4.81 1435 4.80 1432 4.77 1427 4.79 1423 4.84 1420 4.85 1417 4.83 1413 4.84 1410 4.83 3. Core CE96-1 Year AD d13C 1995 3.93 1986 4.03 1982 4.05 1977 4.23 1971 4.28 1967 4.38 1960 4.41 1954 4.49 1947 4.47 1940 4.53 1932 4.55 1926 4.61 1921 4.57 1915 4.64 1909 4.58 1904 4.65 1899 4.63 1894 4.69 1889 4.67 1883 4.68 1878 4.72 1873 4.79 1869 4.77 1864 4.77 1864 4.80 1860 4.76 1855 4.78 1850 4.79 1845 4.78 1840 4.85 1835 4.89 1830 4.88 1826 4.90 1822 4.93 1818 4.89 1813 4.98 1808 4.96 1805 4.92 1800 4.90 1795 4.93 1780 4.95 1776 4.88 1771 4.90 1766 4.92 1761 4.94 1757 4.86 1754 4.91 1748 4.98 1744 4.95 1740 5.02 1736 4.99 1731 5.05 1727 4.97 1723 4.97 1719 5.03 1716 4.96 1707 5.06 1707 5.03 1703 5.04 1699 5.02 1695 5.07 1691 5.04 1687 4.98 1684 5.06 1684 5.07 1679 5.04 1676 5.06 1673 5.00 1669 5.00 1665 4.98 1662 5.01 1658 5.05 1656 4.98 1652 4.97 1649 4.99 1646 5.03 1642 5.01 1639 5.04 1636 5.01 1633 5.01 1630 5.01 1627 5.01 1627 5.05 1625 5.03 1624 5.02 1622 5.00 1621 5.05 1619 4.99 1617 5.05 1616 5.06 1616 5.05 1614 5.04 1612 5.05 1610 5.04 1606 4.97 1604 4.95 1601 5.00 1598 4.94 1595 4.98 1593 4.98 1590 4.95 1587 4.97 1585 5.01 1582 4.95 1580 4.96 1577 4.96 1575 4.94 1572 4.95 1570 4.93 1568 4.93 1565 4.92 1561 4.95 1557 4.90 1554 4.92 1552 4.90 1550 4.91 1547 4.91 1544 4.88 1542 4.92 1539 4.90 1537 4.93 1534 4.91 1531 4.84 1528 4.91 1525 4.90 1522 4.88 1519 4.91 1519 4.89 1516 4.94 1514 4.89 1511 4.83 1511 4.81 1509 4.87 1505 4.87 1503 4.84 1499 4.86 1496 4.83 1494 4.89 1491 4.86 1488 4.89 1485 4.87 1483 4.90 1480 4.90 1478 4.99 1478 4.99 1475 4.89 1472 4.95 1469 4.93 1466 4.94 1463 4.92 1460 4.95 1460 4.93 1458 5.00 1458 5.01 1455 4.92 1452 4.95 1450 4.85 1447 4.92 1445 4.93 1442 4.93 1440 4.89 1436 4.90 1433 4.97 1432 4.90 1428 4.91 1425 4.91 1422 4.91 1420 4.95 1416 4.95 1413 4.93 1411 4.94 1408 4.95 1405 4.89 1402 4.90 1399 4.91 1397 4.90 1393 4.91 1390 4.88 1386 4.95 1383 4.92 1378 4.94 1375 4.95 1371 4.90 1368 4.91