Pigmy Basin, Gulf of Mexico Decadal Foraminiferal Mg/Ca and d18O Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Pigmy Basin, Gulf of Mexico Decadal Foraminiferal Mg/Ca and d18O Data LAST UPDATE: 4/2012 (Addition of SST reconstruction) Original receipt by WDC Paleo 8/2007 CONTRIBUTOR: Julie Richey, University of South Florida IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2007-072 SUGGESTED DATA CITATION: Richey, J.N., et al. 2007. Pigmy Basin, Gulf of Mexico Decadal Foraminiferal Mg/Ca and d18O Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2007-072. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Richey, J.N., R.Z. Poore, B.P. Flower, and T.M. Quinn. 2007. 1400 yr multiproxy record of climate variability from the northern Gulf of Mexico. Geology, Vol. 35, No. 5, pp. 423–426, May 2007. doi: 10.1130/G23507A.1 ABSTRACT: A continuous decadal-scale resolution record of climate variability over the past 1400 yr in the northern Gulf of Mexico was constructed from a box core recovered in the Pigmy Basin, northern Gulf of Mexico. Proxies include paired analyses of Mg/Ca and d18O in the white variety of the planktic foraminifer Globigerinoides ruber and relative abundance variations of G. sacculifer in the foraminifer assemblages. Two multidecadal intervals of sustained high Mg/Ca indicate that Gulf of Mexico sea surface temperatures (SSTs) were as warm or warmer than near-modern conditions between 1000 and 1400 yr B.P. Foraminiferal Mg/Ca during the coolest interval of the Little Ice Age (ca. 250 yr B.P.) indicate that SST was 2-2.5°C below modern SST. Four minima in the Mg/Ca record between 900 and 250 yr B.P. correspond with the Maunder, Spörer, Wolf, and Oort sunspot minima, suggesting a link between changes in solar insolation and SST variability in the Gulf of Mexico. An abrupt shift recorded in both d18Ocalcite and relative abundance of G. sacculifer occurred ca. 600 yr B.P. The shift in the Pigmy Basin record corresponds with a shift in the sea-salt-sodium (ssNa) record from the Greenland Ice Sheet Project 2 ice core, linking changes in high-latitude atmospheric circulation with the subtropical Atlantic Ocean. GEOGRAPHIC REGION: Pigmy Basin, northern Gulf of Mexico PERIOD OF RECORD: 1450 CalYrBP - present DESCRIPTION: High resolution (decadal) paired Globigerinoides ruber (white) Mg/Ca and d18O data, plus G. sacculifer abundance data from box core PBBC-1, Pigmy Basin, northern Gulf of Mexico. Globigerinoides ruber (white) analyses on the 250-300um size fraction. Reconstructed Sea Surface Temperature (SST) added to this file April 2012. Box core PBBC-1: 27°11.61'N, 91°24.54W, 2259m depth. DATA: 1. Radiocarbon ages Column 1: Core Depth (mm) Column 2: Raw 14C age Column 3: Analytical error Column 4: Cal Age (yrs BP) (CALIB 5.0, 400yr reservoir correction) Depth Raw14Cage Error CalAge + - 15-20 350 40 yrs 40 16 31 100-105 535 40 yrs 169 79 48 230-235 1000 40 yrs 584 37 38 295-300 1160 35 yrs 704 27 39 400-405 1445 40 yrs 991 47 49 500-505 1680 40 yrs 1239 43 39 575-580 1825 35 yrs 1362 36 50 2. Foraminiferal Data Column 1: Age, Cal yr B.P. Column 2: Core Depth (mm) Column 3: Mg/Ca (mmol/mol) Column 4: Sea Surface Temperature, °C Column 5: d18O(calcite) Column 6: % G. sacculifer Age Depth Mg/Ca SST d18O %G.sacc 0.0 0 4.398 25.4 -1.530 2.81 12.3 5 4.290 25.1 -1.175 2.08 24.7 10 3.927 24.1 -1.871 2.07 37.0 15 4.040 24.4 -1.305 3.88 49.3 20 3.983 24.3 -1.053 3.47 61.7 25 3.993 24.3 -0.988 5.52 74.0 30 3.876 23.9 -1.174 3.73 86.3 35 3.681 23.4 -1.046 3.00 98.7 40 3.831 23.8 -1.031 2.04 111.0 45 3.892 24.0 -1.009 2.54 123.3 50 3.872 23.9 -1.064 4.53 135.7 55 3.860 23.9 -1.248 4.55 148.0 60 3.583 23.1 -1.451 4.42 160.3 65 3.703 23.4 -1.012 1.61 172.7 70 3.774 23.7 -1.169 2.29 185.0 75 3.777 23.7 -0.871 5.11 197.3 80 4.020 24.4 -1.140 6.56 209.7 85 3.498 22.8 -1.291 2.38 222.0 90 3.777 23.7 -1.392 4.56 234.3 95 3.841 23.8 -1.463 5.17 246.7 100 3.310 22.2 -0.983 3.87 259.0 105 3.533 22.9 -1.204 7.48 271.3 110 3.563 23.0 -0.836 7.10 283.7 115 -1.183 5.39 296.0 120 3.782 23.7 -0.785 3.52 308.3 125 3.685 23.4 -0.923 6.21 320.7 130 3.371 22.4 -1.318 7.26 333.0 135 -1.017 6.77 345.3 140 3.998 24.3 -1.396 7.87 357.7 145 3.675 23.4 -1.556 7.69 370.0 150 3.794 23.7 -1.040 7.74 382.3 155 4.133 24.7 -1.458 5.48 394.7 160 3.789 23.7 -1.086 4.81 407.0 165 4.015 24.3 -1.425 7.16 419.3 170 3.733 23.5 -1.506 6.19 431.7 175 3.737 23.5 -1.390 6.25 444.0 180 3.739 23.6 -1.217 8.57 456.3 185 3.466 22.7 -1.592 6.41 468.7 190 3.933 24.1 -0.777 6.40 481.0 195 4.335 25.2 -1.178 4.93 493.3 200 3.921 24.1 6.31 505.7 205 4.208 24.9 -0.773 4.18 518.0 210 -1.473 6.47 530.3 215 542.7 220 3.575 23.1 -0.812 6.93 555.0 225 -0.952 3.75 567.3 230 4.098 24.6 -1.463 4.00 579.7 235 3.878 24.0 -1.258 5.41 592.0 240 4.075 24.5 -1.410 5.03 604.3 245 4.019 24.4 -1.550 8.88 616.7 250 3.909 24.0 -1.398 8.11 629.0 255 4.042 24.4 -1.634 8.01 641.3 260 3.797 23.7 -1.307 10.13 653.6 265 3.830 23.8 -1.432 7.23 666.0 270 3.652 23.3 -1.406 9.51 678.3 275 3.631 23.2 -1.557 9.44 690.6 280 3.668 23.3 -1.677 9.88 703.0 285 3.880 24.0 -1.302 11.39 715.3 290 -1.321 13.04 727.6 295 3.863 23.9 -1.528 9.12 740.0 300 3.878 24.0 -1.449 8.62 752.3 305 4.116 24.6 -1.696 6.82 764.6 310 3.825 23.8 -1.401 9.94 777.0 315 3.626 23.2 -1.606 7.79 789.3 320 3.854 23.9 -1.598 10.12 801.6 325 3.933 24.1 -1.580 8.44 814.0 330 4.034 24.4 -1.430 9.97 826.3 335 4.259 25.0 -1.505 6.42 838.6 340 3.631 23.2 -1.458 7.21 851.0 345 3.861 23.9 -1.357 5.64 863.3 350 3.433 22.6 -1.457 8.23 875.6 355 3.778 23.7 -1.545 8.14 888.0 360 3.476 22.7 -1.792 11.04 900.3 365 4.061 24.5 -1.797 8.25 912.6 370 4.190 24.8 -1.444 9.97 925.0 375 4.053 24.4 -1.485 6.04 937.3 380 3.380 22.4 -1.347 5.14 949.6 385 4.039 24.4 -1.277 6.40 962.0 390 4.977 26.7 -1.656 7.28 974.3 395 4.265 25.0 -1.881 8.84 986.6 400 4.188 24.8 -1.176 7.55 999.0 405 4.919 26.6 -1.592 14.93 1011.3 410 3.957 24.2 -1.455 9.90 1023.6 415 3.977 24.2 -1.189 7.44 1036.0 420 4.706 26.1 -1.084 9.09 1048.3 425 5.062 26.9 -1.207 9.49 1060.6 430 4.684 26.1 -1.135 9.97 1073.0 435 4.585 25.8 -1.419 10.82 1085.3 440 4.343 25.2 -1.607 11.86 1097.6 445 4.107 24.6 -1.421 7.41 1110.0 450 3.903 24.0 -1.542 10.91 1122.3 455 3.928 24.1 -1.655 6.76 1134.6 460 4.039 24.4 -1.465 8.57 1147.0 465 -1.322 10.80 1159.3 470 4.200 24.8 -1.344 10.20 1171.6 475 4.168 24.8 -1.404 6.65 1184.0 480 4.178 24.8 -1.442 9.78 1196.3 485 4.847 26.4 -1.390 11.73 1208.6 490 4.633 25.9 -1.468 8.82 1221.0 495 3.841 23.8 -1.351 6.29 1233.3 500 3.907 24.0 -1.644 8.75 1245.6 505 4.576 25.8 -1.197 6.34 1258.0 510 4.581 25.8 -1.711 11.14 1270.3 515 4.708 26.1 8.52 1282.6 520 4.891 26.5 6.44 1295.0 525 4.618 25.9 -1.642 7.59 1307.3 530 4.833 26.4 -1.755 11.19 1319.6 535 4.806 26.3 -1.464 7.64 1332.0 540 4.787 26.3 -1.760 10.20 1344.3 545 4.572 25.8 -1.553 7.59 1356.6 550 4.851 26.4 -1.532 6.98 1369.0 555 4.368 25.3 -1.600 3.29 1381.3 560 4.356 25.2 -1.186 5.35 1393.6 565 4.348 25.2 -1.453 4.91 1406.0 570 4.224 24.9 -1.324 10.49 1418.3 575 4.088 24.5 -1.614 8.67 1430.6 580 4.112 24.6 -1.563 7.14 1443.0 585 3.956 24.2 -1.125 7.33 1455.3 590 3.752 23.6 -1.714 8.42