Laurentian Fan 2000 Year Planktonic Foraminifera Census Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Laurentian Fan 2000 Year Planktonic Foraminifera Census Data LAST UPDATE: 4/2011 (Original receipt by WDC Paleo) CONTRIBUTORS: Keigwin, L.D. and R.S. Pickart IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2011-048 WDC PALEO CONTRIBUTION SERIES CITATION: Keigwin, L.D. and R.S. Pickart. 2011. Laurentian Fan 2000 Year Planktonic Foraminifera Census Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2011-048. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Keigwin, L.D. and R.S. Pickart. 1999. Slope Water Current over the Laurentian Fan on Interannual to Millennial Time Scales. Science, Vol. 286, no. 5439, pp. 520-523, 15 October 1999. DOI: 10.1126/science.286.5439.520 ABSTRACT: The strength and position of surface and deep currents in the slope water south of Newfoundland are thought to vary as a coupled system in relation to the dipole in atmospheric sea level pressure known as the North Atlantic oscillation (NAO). Paleoceanographic data from the Laurentian Fan, used as a proxy for sea surface temperature, reveal that surface slope waters north of the Gulf Stream experienced warming during the Little Ice Age of the 16th to 19th centuries and support the notion of an NAO-driven coupled system. The NAO may be a useful model for millennial-scale ocean variability during interglacial climate states. GEOGRAPHIC REGION: North Atlantic PERIOD OF RECORD: 2000 YrBP - present FUNDING SOURCE: US National Science Foundation DESCRIPTION: High resolution planktonic foraminifera census and geochemical data from two cores in the Laurentian Fan region of the North Atlantic, for the last 2000 years. The abundance of the left-coiling form of Neogloboquadrina pachyderma (N.pachy.s.), as a percentage of the total planktonic foraminiferal fauna in the >150um size fraction, is utilized as a paleotemperature proxy. Data include N.pachy.s. and total planktonic foraminifera counts, plus carbonate content and sediment "redness" measurements. Core OCE326-MC13A: 43°05'N, 55°48'W, 3440m water depth. Core OCE326-MC25A: 43°27'N, 54°49'W, 3890m water depth. DATA: 1. Keigwin and Pickart 1999 Table 1. Accelerator radiocarbon dates on mixed planktonic foraminifera. Column 1: Depth (cm) Column 2: Accession number (OS) Column 3: Conventional 14C age Column 4: Error ± 1 sigma Column 5: Calendar age years B.P. (pre-1950) Depth Acc# 14Cage Error CalAge OCE 326 MC-13: 0.5 16709 >Modern* 0 1.5 16738 150 35 — 2.5 16739 420 55 — 3.5 16740 560 30 228 5.5 16741 720 30 328 7.5 16742 1200 30 720 9.5 17729 1370 30 913 11.5 16743 930 45 519 14.5 17731 1290 35 827 18.5 16744 1370 30 913 30.5 17047 2350 25 1948 OCE 326 MC-25: 0 16746 >Modern* 0 10.5 17732 765 25 416 32.5 17730 1660 45 1221 43.5 17240 2030 25 1568 * Samples have a fraction modern (Fm) > 1, bomb 14C is present. Fm = 1.0357 at MC-13 and 1.0087 at MC-25. 2. Core OCE326-MC13A Column 1: Depth Interval (cm) Column 2: Depth Average (cm) Column 3: Age (Calendar Years BP) Column 4: Split 1/n Column 5: Neogloboquadrina pachyderma, count in split Column 6: Other Planktonics, count in split Column 7: Neogloboquadrina pachyderma, % in split Column 8: %Carbonate Column 9: "redness" DepthInt DepthAvg AgeBP Split1/n N.pachy Oth.Plnk %N.pachy %Carb "redness" 0-1 0.5 32 32 46 382 11 23.3 4.47 1-2 1.5 98 32 20 389 5 16 5.61 2-3 2.5 163 8 30 523 5 13.2 6.59 3-4 3.5 228 8 26 282 8 12.5 6.95 4-5 4.5 278 4 25 280 8 13.8 6.84 5-6 5.5 328 32 70 256 21 17.6 4.78 6-7 6.5 524 32 78 232 25 27.8 1.64 7-8 7.5 720 128 89 421 17 24.8 2.9 8-9 8.5 817 128 105 371 22 27.5 1.5 9-10 9.5 913 64 166 573 22 29 1.89 10-11 10.5 962 128 96 318 23 27.6 1.07 11-12 11.5 1012 64 107 376 22 28.5 1.28 12-13 12.5 1061 128 66 315 17 27.6 2.95 13-14 13.5 1110 128 66 259 20 27.5 2.27 14-15 14.5 1159 128 29 220 12 28.3 1.49 15-16 15.5 1209 64 132 420 24 27.7 2.23 16-17 16.5 1258 64 143 456 24 25.4 1.02 17-18 17.5 1307 64 170 645 21 26.7 0.66 18-19 18.5 1357 64 114 352 24 29.9 -0.06 19-20 19.5 1406 128 55 337 14 24.1 0.46 20-21 20.5 1455 64 132 367 26 21.9 -0.33 21-22 21.5 1504 64 160 398 29 23.1 0.27 22-23 22.5 1554 128 88 329 21 25.7 0.42 23-24 23.5 1603 128 77 303 20 21.6 0.32 24-25 24.5 1652 128 104 299 26 24 0.47 25-26 25.5 1702 64 126 383 25 28.1 0.45 26-27 26.5 1751 64 73 245 23 25.3 0.47 27-28 27.5 1800 128 175 726 19 25.7 0.28 28-29 28.5 1849 128 124 552 18 27.3 0.65 29-30 29.5 1899 64 165 472 26 27.7 0.55 30-31 30.5 1948 64 109 406 21 30 0.4 27.2 0.2 26.1 0.07 24.4 0.04 25.1 0.2 26.5 0.31 26.1 0.55 26.5 -0.58 18.1 0.05 3. Core OCE326-MC25A Column 1: Depth Interval (cm) Column 2: Depth Average (cm) Column 3: Age (Calendar Years BP) Column 4: Split 1/n Column 5: Neogloboquadrina pachyderma, count in split Column 6: Other Planktonics, count in split Column 7: Neogloboquadrina pachyderma, % in split Column 8: %Carbonate Column 9: "redness" DepthInt DepthAvg AgeBP Split1/n N.pachy Oth.Plnk %N.pachy %Carb "redness" 0-1 0.5 17 16 107 440 20 22.4 1.57 1-2 1.5 52 16 52 190 21 23.1 1.45 2-3 2.5 87 8 96 388 20 22.9 2.18 3-4 3.5 122 8 153 441 26 23.9 0.53 4-5 4.5 156 16 74 428 15 26.5 1.23 5-6 5.5 191 16 69 336 17 25.9 1.9 6-7 6.5 226 32 40 321 11 24.7 0.26 7-8 7.5 261 32 59 340 15 25.8 0.24 8-9 8.5 295 32 64 425 13 28.8 -0.66 9-10 9.5 330 32 96 416 19 28.3 -0.96 10-11 10.5 365 32 86 323 21 29.8 -0.91 11-12 11.5 406 32 55 223 20 27.9 -1.06 12-13 12.5 446 32 105 396 21 28.6 -1 13-14 13.5 487 16 124 480 21 28.9 -1.16 14-15 14.5 528 32 61 293 17 29.8 -1.05 15-16 15.5 568 32 95 391 20 29.3 -1.14 16-17 16.5 609 64 67 365 16 27.3 -1.12 17-18 17.5 650 32 105 483 18 29 -1.11 18-19 18.5 690 64 59 253 19 29.4 -0.95 19-20 19.5 731 32 79 369 18 30.1 -0.84 20-21 20.5 772 64 36 200 15 30 -1.1 21-22 21.5 813 64 51 268 16 28.8 -0.99 22-23 22.5 853 64 57 307 16 27.2 -1.04 23-24 23.5 894 64 47 208 18 28.6 -1.1 24-25 24.5 935 28.4 -1.22 25-26 25.5 975 64 50 208 19 30.5 -1.05 26-27 26.5 1016 64 71 288 20 28.4 -1.05 27-28 27.5 1057 64 42 210 17 28.4 -1.07 28-29 28.5 1097 64 26 182 13 28 -1.08 29-30 29.5 1138 64 44 332 12 32.7 -1.08 30-31 30.5 1179 64 40 289 12 30.2 -1.22 31-32 31.5 1219 64 54 255 17 29.2 -1.17 32-33 32.5 1260 32 121 496 20 29.1 -1.12 33-34 33.5 1294 64 52 269 16 23.2 -1.2 34-35 34.5 1327 32 102 470 18 22.2 -1.33 35-36 35.5 1361 64 58 332 15 22.8 -1.44 36-37 36.5 1395 32 38 262 13 22.1 -1.3 37-38 37.5 1428 32 66 481 12 21.7 -1.36 38-39 38.5 1462 32 112 728 13 21.9 -1.39 39-40 39.5 1495 32 88 519 14 19.4 -1.58 40-41 40.5 1529 32 61 432 12 19.3 -1.28 41-42 41.5 1563 32 65 356 15 18.8 -1.25 42-43 42.5 1596 32 89 399 18 27.1 -1.5 43-44 43.5 1630 32 112 506 18 29.8 -1.7 44-45 44.5 1664 64 27 141 16 29.1 -1.45 45-46 45.5 1697 32 69 323 18 26.8 -1.1 46-47 46.5 1731 128 59 341 15 30.3 47-48 47.5 32 80 384 17 29.8