Gulf of Mexico MD02-2550 Early Holocene Mg/Ca and d18O Data and SST Reconstruction ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Gulf of Mexico MD02-2550 Early Holocene Mg/Ca and d18O Data and SST Reconstruction LAST UPDATE: 11/2006 (Original receipt by WDC Paleo) CONTRIBUTORS: Jenna M. LoDico, Benjamin P. Flower, and Terrence M. Quinn, University of South Florida. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2006-108 SUGGESTED DATA CITATION: LoDico, J.M., et al. 2006. Gulf of Mexico MD02-2550 Early Holocene Mg/Ca and d18O Data and SST Reconstruction. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2006-108. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: LoDico, J.M., B.P. Flower, and T.M. Quinn. 2006. Subcentennial-scale climatic and hydrologic variability in the Gulf of Mexico during the early Holocene. Paleoceanography, vol. 21, PA3015, doi:10.1029/2005PA001243. ABSTRACT: An early Holocene record from the Gulf of Mexico (GOM) reveals climatic and hydrologic changes during the interval from 10.5 to 7 thousand calendar years before present from paired analyses of Mg/Ca and d18O on foraminiferal calcite. The sea surface temperature record based on foraminiferal Mg/Ca contains six oscillations and an overall ~1.5°C warming that appears to be similar to the September–March insolation difference. The d18O of seawater in the GOM (d18OGOM) record contains six oscillations, including a -0.8 per mil excursion that may be associated with the "8.2 ka climate event" or a broader climate anomaly. Faunal census records from three GOM cores exhibit similar changes, suggesting subcentennial-scale variability in the incursions of Caribbean waters into the GOM. Overall, our results provide evidence that the subtropics were characterized by decadal- to centennial-scale climatic and hydrologic variability during the early Holocene. GEOGRAPHIC REGION: Gulf of Mexico, Orca Basin PERIOD OF RECORD: 10.5 - 7 KYrBP FUNDING SOURCES: National Science Foundation (USA), grant OCE-0318361 to B.P.F. and T.M.Q. DESCRIPTION: High-resolution paired analyses of Mg/Ca and d18O on foraminiferal calcite in the Gulf of Mexico, Orca Basin, core MD02-2550 (26°56.77'N, 91°20.74'W, 2248 m water depth). DATA: Column 1: Depth (cm) Column 2: thousand calendar years (B.P.) Column 3: delta 13C G. ruber (white; 250-350 microns) (per mil VPDB) Column 4: delta 18O G. ruber (white; 250-350 microns) (per mil VPDB) Column 5: Mg/Ca (mmol/mol) Column 6: Sea Surface Temperature (°C) calculated from Mg/Ca as follows: Mg/Ca = 0.449exp(0.090*SST) (Anand et al., 2003) Column 7: delta 18O seawater (per mil VSMOW) calculated as follows: SST = 14.9 - 4.8*(d18Oc-d18Osw) (Bemis et al., 1998) Column 8: thousand calendar years (B.P.) for d18O Gulf of Mexico (GOM) record Column 9: delta 18O seawater Gulf of Mexico (GOM) (per mil VSMOW) corrected for ice volume (Fairbanks, 1989; Bard et al., 1996) using 0.083‰ per 10 m (Adkins and Schrag, 2001). depth Cal kyr d13C d18O Mg/Ca SST d18Osw Cal kyr d18OGOM 190 7.02 0.81 -1.69 4.79 26.30 0.95 7.000 0.75 190.5 7.05 0.93 -1.57 4.84 26.41 1.10 7.025 0.87 191 7.07 0.81 -1.41 4.90 26.56 1.29 7.050 1.01 191.5 7.09 1.07 -1.39 4.80 26.32 1.26 7.075 1.17 192 7.11 1.03 -1.60 5.35 27.54 1.30 7.100 1.17 192.5 7.13 0.85 -1.66 4.81 26.35 0.99 7.125 0.97 193 7.16 0.94 -2.01 5.16 27.13 0.81 7.150 0.76 193.5 7.18 0.62 -1.81 4.87 26.48 0.87 7.175 0.75 194 7.20 0.84 -1.58 4.70 26.09 1.02 7.200 0.87 194.5 7.22 0.93 -1.74 4.84 26.42 0.93 7.225 0.84 195 7.25 0.76 -1.69 4.91 26.59 1.01 7.250 0.86 195.5 7.27 1.02 -1.81 4.75 26.21 0.82 7.275 0.71 196.5 7.31 0.79 -1.90 4.84 26.41 0.77 7.300 0.67 197 7.33 0.95 -1.45 5.03 26.84 1.31 7.325 1.02 197.5 7.36 0.99 -1.76 5.02 26.82 1.00 7.350 0.99 198 7.38 0.90 -1.61 5.28 27.39 1.26 7.375 1.04 198.5 7.40 0.91 -1.88 5.08 26.95 0.90 7.400 0.83 199 7.42 0.90 -1.79 4.78 26.28 0.85 7.425 0.87 199.5 7.45 0.66 -1.52 5.66 28.16 1.51 7.450 1.25 200 7.47 1.07 -1.71 5.07 26.92 1.07 7.475 0.98 200.5 7.49 0.51 -1.78 5.25 27.32 1.08 7.500 1.21 201 7.51 0.45 -1.35 5.46 27.75 1.59 7.525 1.16 201.5 7.53 1.02 -1.55 4.90 26.56 1.14 7.550 1.13 202 7.56 0.78 -1.60 5.39 27.62 1.32 7.575 0.93 202.5 7.58 0.65 -1.83 5.07 26.93 0.94 7.600 0.83 203 7.60 1.00 -1.89 5.24 27.31 0.96 7.625 0.77 203.5 7.62 1.13 -1.89 5.12 27.05 0.92 7.650 0.75 204 7.65 0.77 -2.07 5.22 27.27 0.78 7.675 1.03 204.5 7.67 0.73 -1.51 5.19 27.19 1.32 7.700 0.83 205 7.69 0.84 -1.90 5.12 27.05 0.90 7.725 0.62 205.5 7.71 0.71 -1.85 5.25 27.33 1.01 7.750 0.57 206 7.74 0.60 -2.34 5.21 27.23 0.50 7.775 0.84 206.5 7.76 0.39 -2.01 5.34 27.52 0.89 7.800 0.96 207 7.78 1.10 -1.99 5.54 27.93 1.00 7.825 0.91 207.5 7.80 0.70 -1.74 5.28 27.39 1.13 7.850 0.86 208 7.82 0.89 -1.74 5.06 26.92 1.04 7.875 0.76 208.5 7.85 1.09 -1.65 4.85 26.43 1.03 7.900 0.96 209 7.87 0.89 -1.86 4.89 26.54 0.83 7.925 0.71 209.5 7.89 0.81 -1.73 5.05 26.88 1.03 7.950 0.83 210 7.91 0.98 -1.56 4.99 26.77 1.18 7.975 0.76 210.5 7.93 0.53 -1.97 4.76 26.24 0.66 8.000 0.91 211 7.94 0.84 -1.72 4.79 26.30 0.93 8.025 0.76 211.5 7.96 1.05 -1.79 5.15 27.10 1.02 8.050 0.81 212 7.97 0.70 -1.96 5.12 27.04 0.84 8.075 1.02 212.5 7.99 0.60 -1.66 4.81 26.36 0.99 8.100 0.92 213 8.00 0.63 -1.68 5.13 27.07 1.13 8.125 1.16 213.5 8.02 0.99 -1.78 4.84 26.43 0.89 8.150 1.04 214 8.03 0.86 -1.71 4.68 26.03 0.88 8.175 0.91 214.5 8.05 0.52 -1.54 4.47 25.53 0.94 8.200 1.16 215 8.06 0.53 -1.54 4.61 25.87 1.01 8.225 0.59 216 8.09 0.87 -1.29 4.70 26.10 1.32 8.250 0.82 216.5 8.11 0.61 -1.88 4.90 26.56 0.82 8.275 1.20 217 8.12 0.52 -1.40 4.77 26.26 1.24 8.300 1.12 217.5 8.13 0.75 -1.00 4.56 25.75 1.53 8.325 1.15 218 8.15 1.07 -1.36 4.50 25.60 1.14 8.350 0.94 218.5 8.16 0.66 -1.53 4.77 26.24 1.10 8.375 0.68 219 8.18 0.30 -1.77 5.05 26.89 0.99 8.400 0.55 219.5 8.19 0.69 -1.29 4.75 26.22 1.34 8.425 0.35 220 8.21 0.68 -1.45 5.06 26.92 1.32 8.450 0.51 220.5 8.22 0.56 -1.89 4.69 26.07 0.70 8.475 0.49 221 8.24 0.70 -2.12 4.99 26.76 0.62 8.500 0.47 221.5 8.25 0.75 -1.49 4.67 26.02 1.10 8.525 0.66 222 8.27 0.72 -1.36 4.67 26.03 1.23 8.550 0.96 222.5 8.28 0.62 -1.36 5.36 27.56 1.54 8.575 1.05 223 8.30 0.73 -1.36 4.75 26.21 1.27 8.600 0.88 223.5 8.31 0.47 -1.42 4.70 26.09 1.18 8.625 1.06 224 8.33 0.73 -1.31 5.04 26.87 1.45 8.650 1.08 224.5 8.34 0.62 -1.73 5.08 26.96 1.05 8.675 1.07 225 8.36 0.51 -1.62 5.13 27.07 1.19 8.700 1.07 225.5 8.37 0.78 -1.93 4.95 26.66 0.78 8.725 0.99 226 8.39 1.05 -1.76 4.91 26.57 0.94 8.750 0.92 226.5 8.40 0.79 -2.19 5.15 27.12 0.62 8.775 1.02 227 8.42 0.65 -1.94 5.09 26.98 0.85 8.800 1.16 227.5 8.43 0.79 -2.60 5.04 26.87 0.16 8.825 1.02 228 8.44 0.94 -2.02 5.15 27.11 0.79 8.850 1.01 228.5 8.46 1.23 -1.97 4.80 26.33 0.68 8.875 1.33 229 8.47 0.90 -1.91 5.03 26.85 0.85 8.900 1.32 229.5 8.49 0.74 -2.36 5.07 26.93 0.41 8.925 1.05 230 8.50 0.48 -2.02 4.83 26.39 0.65 8.950 1.24 230.5 8.51 0.53 -1.84 5.14 27.09 0.97 8.975 1.09 231 8.52 0.61 -1.99 5.13 27.06 0.82 9.000 1.15 231.5 8.53 0.41 -1.90 5.06 26.91 0.87 9.025 1.03 232 8.54 1.03 -1.87 5.06 26.92 0.91 9.050 0.89 232.5 8.55 0.73 -1.53 4.97 26.71 1.20 9.075 0.78 233 8.56 0.19 -1.28 4.75 26.21 1.35 9.100 0.96 233.5 8.57 0.92 -1.37 4.91 26.58 1.34 9.125 0.85 234 8.58 0.62 -1.61 4.96 26.69 1.11 9.150 0.71 234.5 8.59 0.91 -1.42 4.83 26.40 1.25 9.175 0.94 235 8.60 0.43 -1.73 4.74 26.20 0.89 9.200 0.79 235.5 8.61 0.59 -1.58 4.93 26.62 1.13 9.225 0.77 236 8.62 0.62 -1.43 4.74 26.20 1.19 9.250 0.87 236.5 8.63 0.72 -1.24 4.65 25.97 1.33 9.275 1.06 237 8.65 0.62 -1.27 4.55 25.73 1.26 9.300 0.88 237.5 8.66 0.79 -1.32 4.59 25.83 1.23 9.325 0.88 238 8.67 0.49 -1.39 4.91 26.57 1.31 9.350 0.62 238.5 8.68 0.83 -1.33 4.52 25.65 1.18 9.375 0.69 239 8.69 0.78 -1.32 4.82 26.37 1.34 9.400 0.89 239.5 8.70 0.33 -1.57 4.82 26.38 1.10 9.425 0.87 240 8.71 0.77 -1.31 4.89 26.53 1.38 9.450 1.03 240.5 8.72 1.05 -1.41 4.55 25.74 1.12 9.475 1.18 241 8.73 0.61 -1.53 4.91 26.57 1.17 9.500 1.10 241.5 8.74 0.65 -1.47 4.68 26.05 1.13 9.525 1.15 242 8.75 0.65 -1.66 5.17 27.14 1.17 9.550 1.01 242.5 8.76 0.67 -1.82 5.08 26.95 0.96 9.575 1.09 243 8.77 1.03 -1.59 4.82 26.37 1.07 9.600 1.14 243.5 8.78 0.52 -1.28 4.81 26.35 1.37 9.625 1.06 244 8.79 0.67 -1.56 5.14 27.08 1.25 9.650 1.07 244.5 8.80 0.73 -1.40 4.94 26.65 1.32 9.675 0.88 245 8.81 0.67 -1.32 5.02 26.82 1.43 9.700 0.81 245.5 8.82 0.85 -1.69 5.20 27.22 1.14 9.725 0.83 246 8.83 0.49 -1.46 4.77 26.27 1.18 9.750 0.60 246.5 8.84 0.91 -1.39 4.61 25.87 1.16 9.775 0.81 247 8.85 0.63 -1.45 4.63 25.94 1.11 9.800 0.55 248.5 8.88 0.56 -1.00 4.72 26.13 1.61 9.825 1.00 249 8.89 0.77 -1.14 4.89 26.52 1.55 9.850 0.95 250 8.91 0.74 -1.24 4.89 26.52 1.46 9.875 0.94 250.5 8.92 0.77 -1.36 4.40 25.35 1.09 9.900 0.46 251 8.94 0.84 -1.19 4.70 26.09 1.41 9.925 0.64 251.5 8.95 0.44 -1.40 5.30 27.42 1.48 9.950 0.88 252.5 8.98 0.81 -1.59 5.12 27.05 1.21 9.975 0.98 253 8.99 0.84 -1.32 4.90 26.56 1.38 10.000 0.89 253.5 9.01 0.29 -1.33 4.81 26.35 1.33 10.025 1.10 254 9.02 1.01 -1.48 5.03 26.84 1.28 10.050 0.90 254.5 9.04 0.62 -1.61 4.90 26.55 1.09 10.075 0.93 255 9.05 0.80 -1.73 5.13 27.07 1.08 10.100 0.92 255.5 9.06 0.85 -1.39 4.53 25.68 1.12 10.125 0.90 256 9.08 0.77 -1.68 4.67 26.03 0.91 10.150 1.00 256.5 9.09 0.59 -1.71 4.91 26.58 1.00 10.175 1.03 257 9.11 0.77 -1.25 4.68 26.04 1.34 10.200 0.78 257.5 9.12 0.49 -1.64 5.11 27.02 1.15 10.225 0.67 258 9.14 0.65 -1.81 4.72 26.15 0.80 10.250 0.89 258.5 9.15 0.76 -1.69 4.37 25.28 0.75 10.275 0.62 259 9.16 0.63 -1.37 4.73 26.16 1.25 10.300 0.91 259.5 9.18 0.88 -1.38 4.51 25.63 1.13 10.325 0.94 260 9.19 0.64 -1.71 4.72 26.14 0.91 10.350 0.75 260.5 9.21 0.62 -1.53 4.70 26.09 1.07 10.375 0.93 261.5 9.24 0.41 -1.83 4.98 26.74 0.90 10.400 0.89 262 9.25 0.44 -1.53 4.72 26.14 1.08 10.425 0.83 262.5 9.27 0.58 -1.18 4.87 26.49 1.50 10.450 0.84 263 9.28 0.69 -1.69 5.07 26.94 1.09 10.475 0.85 263.5 9.29 0.57 -1.55 5.14 27.08 1.26 10.500 0.86 264 9.31 0.28 -1.60 4.64 25.94 0.97 264.5 9.32 0.79 -1.67 5.08 26.95 1.11 265 9.34 0.79 -1.51 4.83 26.40 1.15 265.5 9.35 0.56 -1.81 4.52 25.65 0.70 266 9.37 0.61 -1.66 4.33 25.18 0.76 266.5 9.38 0.81 -1.05 3.95 24.15 1.14 267 9.39 0.50 -1.53 4.39 25.34 0.91 267.5 9.41 0.61 -1.00 4.19 24.83 1.33 268 9.42 0.73 -1.48 4.43 25.44 0.99 268.5 9.44 0.83 -1.15 4.19 24.80 1.19 270 9.48 0.72 -1.07 4.52 25.66 1.45 270.5 9.50 0.53 -1.04 4.23 24.91 1.32 271 9.51 0.48 -1.05 4.11 24.59 1.24 271.5 9.53 0.82 -1.00 4.39 25.34 1.45 272 9.55 0.90 -1.29 4.49 25.58 1.21 272.5 9.56 0.69 -1.36 4.52 25.65 1.14 273 9.58 0.92 -1.10 4.44 25.45 1.37 273.5 9.60 0.61 -1.04 4.58 25.80 1.50 274 9.61 0.53 -1.28 4.22 24.89 1.07 274.5 9.63 0.48 -1.26 4.74 26.19 1.37 275 9.64 0.30 -1.20 4.47 25.54 1.29 275.5 9.66 0.76 -1.16 4.38 25.32 1.28 276 9.68 0.89 -1.52 4.56 25.77 1.01 276.5 9.69 0.82 -1.62 4.69 26.06 0.97 277 9.71 1.02 -1.13 3.97 24.22 1.09 277.5 9.73 0.89 -1.50 4.70 26.09 1.10 278 9.74 0.65 -1.71 4.64 25.95 0.86 278.5 9.76 0.65 -1.68 4.48 25.57 0.82 279 9.78 0.73 -1.39 4.75 26.22 1.23 279.5 9.79 0.75 -1.74 4.55 25.74 0.79 280 9.81 0.98 -1.81 4.68 26.05 0.78 280.5 9.83 0.78 -1.19 4.84 26.42 1.48 281 9.84 0.87 -1.15 4.43 25.44 1.32 281.5 9.86 0.48 -1.44 4.56 25.75 1.09 282 9.88 0.81 -1.20 4.62 25.90 1.37 282.5 9.89 0.78 -1.87 4.49 25.57 0.63 283 9.91 0.81 -1.67 4.43 25.44 0.79 283.5 9.92 0.94 -1.66 4.38 25.30 0.77 284 9.94 0.91 -1.11 4.17 24.76 1.21 284.5 9.96 0.84 -1.35 4.36 25.27 1.07 285 9.97 0.89 -1.03 4.18 24.78 1.30 285.5 9.99 0.93 -1.23 4.37 25.29 1.20 286 10.01 0.94 -1.36 4.46 25.51 1.12 286.5 10.02 0.92 -1.10 4.62 25.90 1.47 287.5 10.06 0.80 -1.43 4.49 25.57 1.07 288 10.07 0.79 -1.25 4.41 25.40 1.21 288.5 10.09 0.80 -1.04 4.10 24.57 1.25 289 10.11 0.92 -1.12 4.04 24.41 1.14 289.5 10.12 0.65 -1.16 4.25 24.97 1.20 290 10.14 0.60 -1.17 4.22 24.89 1.18 290.5 10.15 0.92 -1.01 4.26 24.99 1.36 291 10.17 0.71 -1.32 4.63 25.93 1.25 291.5 10.18 0.74 -0.64 3.77 23.64 1.45 292 10.19 0.79 -1.16 4.04 24.42 1.09 292.5 10.21 0.72 -1.28 4.19 24.81 1.05 293 10.22 0.52 -1.74 4.70 26.09 0.86 293.5 10.24 0.24 -1.28 4.31 25.13 1.12 294 10.25 0.71 -0.96 4.01 24.34 1.27 294.5 10.26 0.46 -1.01 3.89 23.99 1.15 295 10.28 0.61 -1.60 4.33 25.17 0.81 295.5 10.29 0.68 -1.20 3.61 23.17 0.79 296 10.31 0.84 -1.01 4.81 26.34 1.64 296.5 10.32 0.61 -1.38 4.55 25.74 1.15 297 10.33 0.61 -1.28 4.55 25.73 1.25 297.5 10.35 0.78 -1.38 4.25 24.97 0.99 298 10.36 0.59 -1.21 4.06 24.48 1.06 298.5 10.38 0.41 -1.09 4.28 25.06 1.30 299 10.39 0.56 -0.83 3.95 24.15 1.37 299.5 10.40 0.61 -1.16 4.08 24.53 1.12 302.5 10.49 0.38 -1.31 4.46 25.51 1.17