Port Blair, Andaman Islands 1975-2006 Coral Stable Isotope Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Port Blair, Andaman Islands 1975-2006 Coral Stable Isotope Data LAST UPDATE: 10/2010 (Original receipt by WDC Paleo) CONTRIBUTORS: Rixen, T., P. Ramachandran, L. Lehnhoff, D. Dasbach, B. Gaye, B. Urban, R. Ramachandran, and V. Ittekkot. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2010-112 WDC PALEO CONTRIBUTION SERIES CITATION: Rixen, T., et al. 2010. Port Blair, Andaman Islands 1975-2006 Coral Stable Isotope Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2010-112. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Rixen, T., P. Ramachandran, L. Lehnhoff, D. Dasbach, B. Gaye, B. Urban, R. Ramachandran, and V. Ittekkot. 2010. Impact of monsoon-driven surface ocean processes on a coral off Port Blair on the Andaman Islands and their link to North Atlantic climate variations. Global and Planetary Change. doi: 10.1016/j.gloplacha.2010.09.005 ABSTRACT: North Atlantic climate variations are reflected in sedimentary records from the northern Indian Ocean in which two basins, the Arabian Sea and the Bay of Bengal, are strongly affected by the monsoon. Contrary to the Bay of Bengal the Arabian Sea plays an important role in the global marine nitrogen cycle. In its mid-water oxygen minimum zone (OMZ) bioavailable fixed nitrogen is reduced to nitrogen gas (NO3- -> N2), whereas oxygen concentrations are slightly above the threshold of nitrate reduction in the OMZ of the Bay of Bengal. A coral colony (Porites lutea) growing south of Port Blair on the Andaman Islands in the Bay of Bengal was studied for its response to changes in the monsoon system and its link to temperature changes in the North Atlantic Ocean, between 1975 and 2006. Its linear extension rates, d13C and d18O values measured within the coral skeleton reveal a strong seasonality, which seems to be caused by the monsoon-driven reversal of the surface ocean circulation. The sampling site appears to be influenced by low salinity Bay of Bengal Water during the NE monsoon (boreal winter) and by the high salinity Arabian Sea Water during the SW monsoon in summer. The high salinity Arabian Sea Water circulates along with the Summer Monsoon Current (S-MC) from the Arabia Sea into the Bay of Bengal. Decreasing d18O and reconstructed salinity values correlate to the increasing SSTs in the North Atlantic Ocean indicating a reduced influence of the S-MC at the sampling site in the course of northern hemispheric warming. During such periods oxygen-depletion became stronger in the OMZ of the Arabian Sea as indicated by the sedimentary records. A reduced propagation of oxygen-depleted high salinity Arabian Sea Water into the Bay of Bengal could be a mechanism maintaining oxygen concentration above the threshold of nitrate reduction in the OMZ of the Bay of Bengal in times of global warming. GEOGRAPHIC REGION: Bay of Bengal, Indian Ocean PERIOD OF RECORD: 1975 - 2006 AD FUNDING SOURCES: Department of Science and Technology, Government of India, Bundesministerium für Bildung und Forschung (BMBF / DST-BMBF Project No. IND 04/003), and the Deutsche Forschungsgemeinschaft (DFG / Project RI 1194/3-1). Ministry of Earth Sciences (OSTC) and Ministry of Environment and Forests, Government of India. Hanse-Wissenschaftskolleg, Delmenhorst, Germany research fellowship to P.R. DESCRIPTION: Andaman Islands coral stable isotope data at monthly resolution. A Porites lutea colony from a reef south of Port Blair was sampled in March 2006, at a water depth of ~6 m. The core has a diameter of 6.4 cm and a length of ~37 cm. The d18O and d13C values were calibrated relative to NBS19 and are given in per mil deviation from the PDB. Coral reef south of Port Blair, Andaman Islands, Bay of Bengal: 11°30.288'N, 92°41.59'E, ~6m water depth. DATA: Port Blair monthly coral stable isotope data Distance in mm. Isotopes per mil PDB Distance Year Month d18O d13C 1.84 2006 2 -5.71 -1.87 2.57 2006 1 -5.75 -2.01 3.29 2005 12 -5.82 -2.32 3.99 2005 11 -5.8 -2.53 5.15 2005 10 -5.76 -2.49 6.06 2005 9 -5.79 -2.96 7 2005 8 -5.77 -2.91 8 2005 7 -5.86 -3.21 8.95 2005 6 -5.87 -3.15 12.02 2005 5 -5.86 -2.17 12.3 2005 4 -5.9 -2.15 12.53 2005 3 -5.86 -2.2 12.74 2005 2 -5.82 -2.26 12.97 2005 1 -5.79 -2.3 13.43 2004 12 -5.87 -2.2 13.87 2004 11 -5.94 -2.07 14.78 2004 10 -5.83 -1.93 15.64 2004 9 -5.79 -2.31 16.54 2004 8 -5.72 -2.31 17.73 2004 7 -5.74 -2.29 18.73 2004 6 -5.86 -3.08 23.71 2004 5 -5.99 -2.43 24.88 2004 4 -6.02 -2.32 26.39 2004 3 -5.79 -2.57 27.3 2004 2 -5.68 -2.8 28.12 2004 1 -5.8 -2.86 28.93 2003 12 -5.89 -2.87 29.72 2003 11 -5.85 -2.78 30.78 2003 10 -5.96 -2.53 31.81 2003 9 -5.92 -2.03 32.88 2003 8 -5.92 -2.11 33.95 2003 7 -5.84 -2.41 34.28 2003 6 -5.93 -2.5 34.62 2003 5 -6.06 -2.55 34.94 2003 4 -6.14 -2.53 35.78 2003 3 -5.79 -2.2 36.7 2003 2 -5.66 -2.34 37.72 2003 1 -5.54 -2.26 38.9 2002 12 -5.67 -2.58 41.03 2002 11 -5.82 -2.92 42.12 2002 10 -5.82 -2.31 42.96 2002 9 -5.67 -2.05 43.42 2002 8 -5.7 -2.08 43.87 2002 7 -5.77 -2.19 44.63 2002 6 -5.88 -2.44 45.89 2002 5 -5.97 -2.35 46.8 2002 4 -6.03 -2.33 47.8 2002 3 -5.85 -2.22 48.81 2002 2 -5.81 -2.4 49.92 2002 1 -5.73 -2.69 50.29 2001 12 -5.73 -2.86 50.65 2001 11 -5.75 -3 51.77 2001 10 -5.75 -3.25 52.64 2001 9 -5.69 -2.69 53.27 2001 8 -5.55 -2.19 54.11 2001 7 -5.68 -2 54.9 2001 6 -5.8 -2.06 55.72 2001 5 -5.9 -2.18 56.39 2001 4 -5.9 -2.27 56.64 2001 3 -5.85 -2.29 56.85 2001 2 -5.79 -2.3 57.09 2001 1 -5.74 -2.3 57.58 2000 12 -5.83 -2.24 58.04 2000 11 -5.9 -2.2 58.53 2000 10 -5.98 -2.25 60.45 2000 9 -5.97 -2.5 62.46 2000 8 -5.76 -2.37 64.49 2000 7 -5.65 -1.98 65.43 2000 6 -5.67 -2.07 65.94 2000 5 -5.78 -2.13 66.42 2000 4 -5.88 -2.23 68.46 2000 3 -5.84 -2.47 69.08 2000 2 -5.71 -2.46 69.75 2000 1 -5.58 -2.46 72 1999 12 -5.64 -2.25 72.96 1999 11 -5.76 -2.34 74.87 1999 10 -5.78 -2.41 75.88 1999 9 -5.79 -1.85 76.92 1999 8 -5.71 -1.66 77.94 1999 7 -5.7 -1.71 79.12 1999 6 -5.76 -2.1 79.57 1999 5 -5.85 -2.35 80 1999 4 -5.92 -2.54 80.95 1999 3 -5.85 -2.64 81.99 1999 2 -5.76 -2.66 83.82 1999 1 -5.71 -2.47 84.24 1998 12 -5.72 -2.82 84.63 1998 11 -5.78 -3.19 85.05 1998 10 -5.81 -3.17 90.68 1998 9 -5.83 -2.1 92.07 1998 8 -5.99 -2.21 92.77 1998 7 -5.96 -2.25 93.32 1998 6 -6 -2.32 93.88 1998 5 -6.06 -2.37 94.51 1998 4 -5.94 -2.23 95.16 1998 3 -5.8 -2.06 97.8 1998 2 -5.67 -2.21 98.67 1998 1 -5.61 -2.3 99.03 1997 12 -5.68 -2.4 99.37 1997 11 -5.76 -2.53 99.73 1997 10 -5.78 -2.47 102.58 1997 9 -5.65 -1.86 103.68 1997 8 -5.61 -1.76 104.83 1997 7 -5.66 -2.26 105.21 1997 6 -5.76 -2.41 105.6 1997 5 -5.85 -2.42 105.98 1997 4 -5.92 -2.45 106.47 1997 3 -5.81 -2.56 106.9 1997 2 -5.69 -2.65 107.48 1997 1 -5.68 -2.51 108.06 1996 12 -5.7 -2.3 109.07 1996 11 -5.74 -2.19 113.73 1996 10 -5.77 -2.06 115.02 1996 9 -5.67 -1.81 115.54 1996 8 -5.7 -1.87 116.05 1996 7 -5.76 -1.94 117 1996 6 -5.84 -1.92 117.55 1996 5 -5.86 -2.11 118.07 1996 4 -5.86 -2.33 118.7 1996 3 -5.77 -2.38 119.27 1996 2 -5.7 -2.29 120.73 1996 1 -5.68 -2.22 121.03 1995 12 -5.71 -2.54 121.31 1995 11 -5.78 -2.64 121.59 1995 10 -5.82 -2.73 122.47 1995 9 -5.68 -2.67 123.38 1995 8 -5.7 -2.27 124.3 1995 7 -5.66 -1.91 125.17 1995 6 -5.65 -1.89 126.08 1995 5 -5.72 -1.91 126.96 1995 4 -5.78 -1.9 129.82 1995 3 -5.62 -2.13 132.45 1995 2 -5.53 -1.96 133.3 1995 1 -5.5 -1.79 133.85 1994 12 -5.54 -1.85 134.37 1994 11 -5.61 -1.96 135.34 1994 10 -5.82 -2.17 136.26 1994 9 -5.66 -2.17 138.51 1994 8 -5.67 -2.1 139.45 1994 7 -5.57 -2.02 140.53 1994 6 -5.64 -2.32 141.43 1994 5 -5.71 -2.29 142.47 1994 4 -5.65 -2.25 143.56 1994 3 -5.56 -2.18 144.49 1994 2 -5.62 -2.22 146.6 1994 1 -5.58 -2.03 147.1 1993 12 -5.6 -1.93 147.56 1993 11 -5.65 -1.9 148.2 1993 10 -5.66 -2.14 148.81 1993 9 -5.64 -2.37 149.67 1993 8 -5.56 -2.13 150.62 1993 7 -5.63 -2.19 151.53 1993 6 -5.78 -2.42 152.34 1993 5 -5.8 -2.31 154.13 1993 4 -5.63 -2.23 155.99 1993 3 -5.58 -2.05 157.68 1993 2 -5.59 -2.17 159.64 1993 1 -5.66 -2.54 161.59 1992 12 -5.59 -2.65 162.73 1992 11 -5.62 -2.76 163.78 1992 10 -5.71 -2.65 165.08 1992 9 -5.66 -2.49 166.21 1992 8 -5.64 -2.4 168.14 1992 7 -5.73 -2.33 169.56 1992 6 -5.83 -2.24 171.02 1992 5 -5.85 -2.24 172.43 1992 4 -5.8 -2.23 173.08 1992 3 -5.74 -2.24 173.66 1992 2 -5.68 -2.27 173.89 1992 1 -5.69 -2.31 174.11 1991 12 -5.7 -2.37 174.33 1991 11 -5.72 -2.42 174.55 1991 10 -5.74 -2.45 175.33 1991 9 -5.81 -2.31 176.05 1991 8 -5.69 -2.31 177.29 1991 7 -5.74 -2.38 178.19 1991 6 -5.82 -2.37 179.12 1991 5 -5.86 -2.28 179.71 1991 4 -5.84 -2.21 180.32 1991 3 -5.79 -2.16 180.88 1991 2 -5.66 -2.11 181.41 1991 1 -5.66 -2.02 181.94 1990 12 -5.7 -1.91 182.46 1990 11 -5.74 -1.88 182.99 1990 10 -5.77 -1.95 184.49 1990 9 -5.75 -2.04 186.03 1990 8 -5.58 -1.94 187.37 1990 7 -5.67 -1.99 188.66 1990 6 -5.66 -2.08 190.02 1990 5 -5.7 -1.89 190.57 1990 4 -5.67 -1.82 191.13 1990 3 -5.6 -1.73 192.1 1990 2 -5.48 -1.47 193.18 1990 1 -5.41 -1.6 193.97 1989 12 -5.52 -1.78 195.74 1989 11 -5.71 -1.95 197.12 1989 10 -5.66 -2.04 197.71 1989 9 -5.58 -2.09 198.32 1989 8 -5.54 -2.15 199.76 1989 7 -5.63 -2.32 200.92 1989 6 -5.69 -2.36 202.12 1989 5 -5.76 -2.15 202.72 1989 4 -5.74 -2.03 203.33 1989 3 -5.69 -1.95 203.88 1989 2 -5.68 -1.94 204.49 1989 1 -5.67 -1.96 205.11 1988 12 -5.66 -2.13 205.47 1988 11 -5.72 -2.19 205.84 1988 10 -5.79 -2.23 207.91 1988 9 -5.53 -2.08 208.1 1988 8 -5.52 -2 208.28 1988 7 -5.62 -1.95 208.47 1988 6 -5.72 -1.91 208.68 1988 5 -5.76 -1.87 211.02 1988 4 -5.66 -1.99 213.5 1988 3 -5.61 -2.01 215.73 1988 2 -5.62 -1.96 218.21 1988 1 -5.57 -1.73 220.2 1987 12 -5.56 -1.67 220.8 1987 11 -5.61 -1.77 221.42 1987 10 -5.66 -1.83 222.02 1987 9 -5.61 -1.77 223 1987 8 -5.49 -1.84 223.98 1987 7 -5.62 -2.06 225.72 1987 6 -5.58 -1.98 227.5 1987 5 -5.67 -2.05 228 1987 4 -5.68 -2.18 228.5 1987 3 -5.67 -2.2 229.03 1987 2 -5.61 -2.16 229.6 1987 1 -5.54 -2.11 230.68 1986 12 -5.57 -2.02 231.63 1986 11 -5.68 -2.04 232.76 1986 10 -5.56 -1.97 233.64 1986 9 -5.62 -2 235.57 1986 8 -5.53 -2.07 237.32 1986 7 -5.6 -2.17 238.33 1986 6 -5.64 -2.2 239.35 1986 5 -5.71 -2.37 240.16 1986 4 -5.56 -2.31 240.99 1986 3 -5.55 -2.28 241.58 1986 2 -5.53 -2.39 242.16 1986 1 -5.61 -2.37 242.87 1985 12 -5.66 -2.37 243.55 1985 11 -5.68 -2.38 243.98 1985 10 -5.58 -2.24 244.39 1985 9 -5.49 -2.12 244.82 1985 8 -5.5 -2.15 245.24 1985 7 -5.52 -2.2 246.11 1985 6 -5.61 -2.29 247.02 1985 5 -5.69 -2.37 247.44 1985 4 -5.66 -2.38 247.87 1985 3 -5.61 -2.38 248.26 1985 2 -5.56 -2.35 248.98 1985 1 -5.59 -2.11 249.71 1984 12 -5.67 -1.93 250.42 1984 11 -5.77 -1.88 250.64 1984 10 -5.74 -1.78 250.85 1984 9 -5.67 -1.65 251.07 1984 8 -5.63 -1.57 252.11 1984 7 -5.73 -1.77 253.13 1984 6 -5.73 -1.8 254.18 1984 5 -5.74 -1.92 259.1 1984 4 -5.73 -1.97 259.8 1984 3 -5.71 -1.92 260.39 1984 2 -5.64 -1.88 261.03 1984 1 -5.55 -1.88 261.91 1983 12 -5.56 -1.89 262.75 1983 11 -5.6 -1.99 263.46 1983 10 -5.61 -2.15 264.42 1983 9 -5.61 -2.28 266.44 1983 8 -5.58 -2.34 267.14 1983 7 -5.56 -2.44 267.82 1983 6 -5.55 -2.47 268.52 1983 5 -5.58 -2.46 269.19 1983 4 -5.6 -2.51 269.89 1983 3 -5.62 -2.6 270.76 1983 2 -5.57 -2.57 279.06 1983 1 -5.62 -2.37 279.3 1982 12 -5.66 -2.15 279.53 1982 11 -5.71 -2.13 279.76 1982 10 -5.74 -2.06 280.57 1982 9 -5.63 -1.79 281.42 1982 8 -5.54 -1.59 282.26 1982 7 -5.55 -1.61 283.18 1982 6 -5.68 -1.69 284.86 1982 5 -5.81 -1.9 285.36 1982 4 -5.74 -1.96 285.87 1982 3 -5.63 -1.95 286.95 1982 2 -5.53 -2 287.26 1982 1 -5.59 -2.1 287.57 1981 12 -5.68 -2.23 287.87 1981 11 -5.75 -2.34 288.66 1981 10 -5.75 -2.41 290.91 1981 9 -5.68 -1.96 291.74 1981 8 -5.62 -1.7 292.66 1981 7 -5.62 -1.6 295.17 1981 6 -5.62 -1.72 295.44 1981 5 -5.63 -1.89 295.64 1981 4 -5.6 -1.96 295.86 1981 3 -5.58 -2.03 296.06 1981 2 -5.56 -2.11 297.21 1981 1 -5.57 -2.25 297.61 1980 12 -5.62 -2.34 298 1980 11 -5.66 -2.39 298.29 1980 10 -5.64 -2.35 298.57 1980 9 -5.6 -2.28 298.88 1980 8 -5.57 -2.28 301 1980 7 -5.61 -2.65 302.09 1980 6 -5.77 -2.53 302.76 1980 5 -5.7 -2.53 303.41 1980 4 -5.65 -2.46 304.09 1980 3 -5.63 -2.36 304.64 1980 2 -5.64 -2.3 305.25 1980 1 -5.65 -2.23 306.88 1979 12 -5.67 -1.89 311.67 1979 11 -5.7 -1.94 311.98 1979 10 -5.68 -2.1 312.28 1979 9 -5.63 -2.19 312.59 1979 8 -5.6 -2.26 314.09 1979 7 -5.65 -2.26 315.23 1979 6 -5.76 -2.64 316.25 1979 5 -5.81 -2.52 317.34 1979 4 -5.74 -2.28 318.47 1979 3 -5.62 -1.79 318.78 1979 2 -5.61 -1.67 319.12 1979 1 -5.63 -1.65 319.46 1978 12 -5.65 -1.65 320.25 1978 11 -5.72 -1.8 321.27 1978 10 -5.71 -1.8 325.74 1978 9 -5.62 -1.89 328.98 1978 8 -5.54 -1.38 330.12 1978 7 -5.67 -1.69 330.89 1978 6 -5.7 -2.04 331.68 1978 5 -5.7 -2.25 332.44 1978 4 -5.68 -2.21 333.23 1978 3 -5.68 -2.29 334.25 1978 2 -5.76 -2.4 335.37 1978 1 -5.71 -2.31 336.6 1977 12 -5.74 -1.91 337.32 1977 11 -5.76 -1.68 338.11 1977 10 -5.74 -1.74 339.02 1977 9 -5.73 -1.7 342.01 1977 8 -5.64 -1.66 344.12 1977 7 -5.54 -2.01 345.09 1977 6 -5.65 -2.22 345.39 1977 5 -5.64 -2.24 345.66 1977 4 -5.62 -2.25 345.95 1977 3 -5.6 -2.26 346.86 1977 2 -5.6 -2.3 347.87 1977 1 -5.66 -2.1 348.8 1976 12 -5.71 -2.04 349.83 1976 11 -5.78 -2.05 350.13 1976 10 -5.77 -2.04 350.41 1976 9 -5.75 -2.02 350.72 1976 8 -5.74 -1.98 351.92 1976 7 -5.76 -1.71 353.84 1976 6 -5.79 -1.74 354.77 1976 5 -5.81 -1.73 355.65 1976 4 -5.78 -1.84 356.54 1976 3 -5.68 -2.11 356.9 1976 2 -5.65 -2.14 357.28 1976 1 -5.65 -2.11 358.53 1975 12 -5.65 -2.08 359.65 1975 11 -5.72 -2.15 360.5 1975 10 -5.68 -2.07 361.2 1975 9 -5.66 -1.95 362.05 1975 8 -5.61 -1.92 363.28 1975 7 -5.66 -1.88 363.56 1975 6 -5.67 -1.88 363.84 1975 5 -5.66 -1.89 364.11 1975 4 -5.66 -1.91 364.39 1975 3 -5.64 -1.89