Laurentian Fan 8200 YrBP Slope Water Sediment Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Laurentian Fan 8200 YrBP Slope Water Sediment Data LAST UPDATE: 9/2007 (Original receipt by WDC Paleo) CONTRIBUTOR: Lloyd Keigwin, Woods Hole Oceanographic Institution IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2007-084 SUGGESTED DATA CITATION: Keigwin, L.D., et al. 2007. Laurentian Fan 8200 YrBP Slope Water Sediment Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2007-084. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Keigwin, L.D., J. Sachs, Y. Rosenthal, and E.A. Boyle. 2005. The 8200 year B.P. event in the slope water system, western subpolar North Atlantic. Paleoceanography, Vol.20, PA2003, doi: 10.1029/2004PA001074. ABSTRACT: Stable isotope, trace metal, alkenone paleothermometry, and radiocarbon methods have been applied to sediment cores in the western subpolar North Atlantic between Hudson Strait and Cape Hatteras to reveal the history of climate in that region over the past ~11 kyr. We focus on cores from the Laurentian Fan, which is known to have rapid and continuous accumulation of hemipelagic sediment. Although results among our various proxy data are not always in agreement, the weight of the evidence (alkenone sea surface temperature (SST), d18O and abundance of Globigerinoides ruber) indicates a continual cooling of surface waters over Laurentian Fan, from about 18°C in the early Holocene to about 8°C today. Alternatively, Mg/Ca data on planktonic foraminifera indicate no systematic change in Holocene SST. The inferred long-term decrease in SST was probably driven by decreasing seasonality of Northern Hemisphere insolation. Two series of proxy data show the gradual cooling was interrupted by a two-step cold pulse that began 8500 years ago, and lasted about 700 years. Although this event is associated with the final deglaciation of Hudson Bay, there is no d18O minimum anywhere in the Labrador Sea, yet there is some evidence for it as far south as Cape Hatteras. Finally, although the 8200 year B.P. event has been implicated in decreasing North Atlantic ventilation, and hence widespread temperature depression on land and at sea, we find inconsistent evidence for a change at that time in deep ocean nutrient content at ~4 km water depth. GEOGRAPHIC REGION: Laurentian Fan, western subpolar North Atlantic PERIOD OF RECORD: 17 KYrBP - present FUNDING SOURCES: Funding for JPS was from the NOAA Climate and Global Change Program (NA 16GP2679), NSF-Earth System History (0116940), the Jeptha H. and Emily V. Wade Award for Research, and a Henry L. and Grace Doherty Professorship. LDK and YR were funded by NSF grant OCE-0117149. DESCRIPTION: High resolution Holocene and deglacial stable isotope, trace metal, alkenone and Mg/Ca paleothermometry, and foraminiferal census data from sediment cores on the Laurentian Fan, continental slope of the western subpolar North Atlantic, including the 8200 BP event. Table 1. Location of core sites discussed in this paper. Core name Depth(m) N. latitude W. longitude CH07-98 2GGC 965 37° 37.163 74° 10.630 CH07-98 19GGC 1049 36° 52.264 74° 34.179 OCE3326 14GGC 3525 43° 03.959 55° 49.992 OCE3326 13MC 3440 43° 03.97 55° 50.03 OCE326 26GGC 3975 43° 28.997 54° 51.984 OCE326 25MC 3890 43° 29.001 54° 52.019 HU96029 69TWC 3506 43° 03.972 55° 50.030 HU85027-057PC 790 61° 04.320 66° 25.620 HU90023-045PC 845 60° 56.822 66° 08.280 HU82054-14PC 577 56° 26.149 59° 53.200 HU91045-94PC 3448 50° 12.26 45° 41.14 HU87033-17PC 514 54° 36.99 56° 10.6 HU79019-98 594 55° 46.260 58° 49.480 HU87033-17PC 514 54° 36.99 56° 10.6 V17-178 4006 43° 29.0 54° 52.0 HU73031-7PC 4055 42° 58.700 55° 14.900 DATA: 1. AMS dates used in this paper, including those of Keigwin and Pickart [1999] on 13 and 25 MC. Cruise, core depth species Conv.14Cage Error NOSAMS Cal. age age range (cm) (yrs, B.P.) (1s) # (yrs, B.P.) (1s) CH07-98, 19GGC 0.5 mixed planktonics 925 35 38860 521 541 to 504 217 G. bulloides 8130 45 26433 8587 8641 to 8530 305 G. inflata 9970 50 26434 10815 11128 to 10611 369 mixed planktonics 10450 50 26435 11358 11899 to 10880 OCE326, 25MC 0 mixed planktonics 0* 16746 0 10.5 mixed planktonics 780 30 17732 416 436 to 385 32.5 mixed planktonics 1680 50 17730 1221 1260 to 1164 43.5 mixed planktonics 2040 25 17240 1568 1607 to 1537 OCE326, 26GGC 35 alkenones 2740 35 39019 2428 2539 to 2338 66 N. pachyderma s. 2610 40 31452 2303 2328 to 2280 96 N. pachyderma s. 3380 75 31453 3248 3337 to 3153 120 G. inflata 3950 45 26436 3923 3981 to 3865 161 mixed planktonics 5050 45 35599 5431 5458 to 5316 195 N. pachyderma s. 6110 50 31454 6530 6610 to 6465 204.5 N. pachyderma s. 6190 50 31455 6633 6674 to 6564 234.5 G. menardii 7180 55 31456 7643 7676 to 7585 240.5 N. pachyderma s. 7640 60 38435 8103 8158 to 8007 248.5 N. pachyderma s. 8090 75 31476 8544 8628 to 8437 270.5 mixed planktonics 8420 40 38436 8919 8964 to 8866 310 G. inflata 8940 50 26437 9500 9778 to 9150 370 alkenones 10050 65 41480 10982 11149 to 10651 395 G. inflata 9720 55 26438 10327 10589 to 10297 441 mixed planktonics 10050 50 38437 10982 11147 to 10655 OCE326, 13MC 0.5 mixed planktonics 0* 16737 0 1.5 mixed planktonics 165 40 16738 0 2.5 mixed planktonics 435 55 16739 0 3.5 mixed planktonics 570 30 16740 228 251 to 136 5.5 mixed planktonics 735 30 16741 328 403 to 302 7.5 mixed planktonics 1210 30 16742 720 752 to 686 9.5 mixed planktonics 1390 35 17729 913 931 to 894 11.5 mixed planktonics 930 45 16743 519 544 to 496 14.5 mixed planktonics 1300 35 17731 827 884 to 774 18.5 mixed planktonics 1380 30 16744 913 931 to 894 30.5 mixed planktonics 2360 30 17047 1948 1979 to 1920 OCE326, 14GGC 128 G. inflata 9510 45 38545 10278 10303 to 10105 203 N. pachyderma s. 11200 40 45401 12838 12902 to 12644 236 mixed planktonics 12450 70 38547 13824 14087 to 13703 256 mixed planktonics 12750 55 38548 14200 15082 to 14115 285 mixed planktonics 12650 60 38431 14116 14315 to 14084 362 mixed planktonics 13600 75 38687 15749 15988 to 15530 404 N. pachyderma s. 15050 80 42493 17422 17162 to 17683 HU96029, 69TWC 0.5 mixed planktonics 670 40 14060 297 326 to 277 4.5 mixed planktonics 1240 55 14061 770 857 to 715 26.5 mixed planktonics 2880 25 17049 2695 2708 to 2674 *Fraction modern >1 2. Stable isotope data, Core OCE3326-14GGC depth Calib age d18-O d13C m (Feb 04) N.pachy.s N.pachy.s. 120 10015.33 2.46 0.25 124 10146.67 2.09 0.33 128 10278 2.6 0.13 132 10409.33 2.34 0.22 136 10540.67 2.33 0.25 140 10672 2.33 0.22 144 10803.33 2.56 0.13 148 10934.67 2.44 0.11 152 11066 2.18 0.06 156 11197.33 2.55 0.17 160 11328.67 2.3 0.03 164 11460 2.08 0.07 168 11591.33 2.45 0.05 172 11722.67 2.49 -0.05 176 11854 2.41 0 180 11985.33 2.44 -0.16 184 12116.67 2.45 -0.21 188 12248 2.47 -0.12 192 12379.33 2.24 -0.32 194 12445 2.47 -0.03 202 12707.67 2.58 -0.32 204 12773.33 2.57 -0.23 208 12904.67 2.78 -0.12 212 13036 2.83 -0.08 216 13167.33 2.95 -0.01 220 13298.67 2.74 -0.12 224 13430 3.12 -0.03 228 13561.33 3.09 -0.03 229 13594.17 3.1 -0.08 230 13627 2.76 -0.23 231 13659.83 3.33 0.02 232 13692.67 3.27 0.02 233 13725.5 3.19 0.13 234 13758.33 2.96 -0.11 235 13791.17 2.72 -0.39 236 13824 3.09 0.02 240 13899.2 2.97 -0.06 244 13974.4 3.22 -0.02 248 14049.6 3.27 -0.04 252 14124.8 2.81 -0.08 253 14143.6 2.88 -0.43 254 14162.4 3.06 -0.3 255 14181.2 2.73 -0.38 256 14200 3.28 0.2 257 14214.61 2.9 -0.5 258 14229.23 3.07 -0.15 259 14243.84 3.07 -0.28 260 14258.45 3.32 -0.07 264 14316.91 3.44 0.15 268 14375.36 3.37 0.05 272 14433.81 3.32 -0.02 276 14492.26 3.26 0.05 280 14550.72 3.48 0.06 281 14565.33 3.45 -0.6 282 14579.94 3.29 -0.38 283 14594.56 3.08 -0.2 284 14609.17 2.79 -0.21 285 14623.78 2.68 -0.49 286 14638.4 2.91 -0.42 287 14653.01 3 -0.34 288 14667.62 3.37 0.05 292 14726.08 3.2 -0.34 296 14784.53 3.2 -0.31 300 14842.98 3.49 -0.23 304 14901.43 3.4 -0.36 308 14959.89 3.27 -0.35 312 15018.34 -0.27 316 15076.79 3.56 -0.32 320 15135.25 3.02 -0.25 324 15193.7 2.93 -0.34 328 15252.15 3.04 -0.38 332 15310.6 3.16 -0.3 336 15369.06 3.19 -0.36 340 15427.51 3.35 -0.18 344 15485.96 3.2 -0.45 348 15544.42 3.26 -0.23 352 15602.87 2.62 -0.58 356 15661.32 2.62 -0.8 357 15675.93 358 15690.55 359 15705.16 2.54 -0.58 360 15719.77 2.69 -0.76 361 15734.39 2.59 -0.63 362 15749 2.63 -0.51 363 15768.27 2.78 -0.38 364 15787.54 3.02 -0.36 368 15864.62 2.83 -0.51 372 15941.71 2.84 -0.49 373 15960.98 2.57 -0.84 374 15980.25 2.5 -0.8 375 15999.52 2.43 -0.76 376 16018.79 2.5 -0.59 376 16018.79 2.32 -0.92 377 16038.06 2.42 -0.9 378 16057.33 2.3 -1.33 379 16076.6 380 16095.88 2.81 -0.53 384 16172.96 3.07 -0.64 388 16250.04 3.12 -0.64 392 16327.12 3.13 -0.47 396 16404.21 3.28 -0.34 400 16481.29 3.35 -0.32 404 16558.38 3.65 -0.4 408 16635.46 3.61 -0.42 412 16712.54 3.65 -0.27 416 16789.62 3.47 -0.73 428 17020.88 3.42 -0.58 432 17097.96 3.63 -0.72 436 17175.04 3.78 -0.53 440 17252.12 3.66 -0.46 448 17406.29 3.61 -0.48 3a. N. pachy left stable isotope data, Core OCE326 26GGC depth CalibAge avg.d18O avg.d13C d18O d13C cm yrs N.p.s. N.p.s. N.p.s N.p.s. 50 1780.33 2.04 0.63 2.27 0.62 50 1.8 0.64 52 1845.67 1.93 0.5 1.93 0.5 54 1911 1.94 0.52 1.94 0.52 56 1976.33 1.93 0.57 1.93 0.57 58 2041.67 1.86 0.5 1.86 0.5 60 2107 2.08 0.69 2.08 0.69 62 2172.33 2.13 0.61 2.13 0.61 64 2237.67 1.89 0.58 1.89 0.58 66 2303 1.67 0.56 1.67 0.56 68 2366 1.71 0.51 1.71 0.51 70 2429 2.27 0.65 2.27 0.65 72 2492 1.84 0.44 1.84 0.44 74 2555 2.21 0.55 2.21 0.55 76 2618 1.89 0.39 1.89 0.39 78 2681 2.15 0.66 2.15 0.66 80 2744 2.02 0.44 2.02 0.44 82 2807 1.85 0.55 1.85 0.55 84 2870 2.19 0.61 2.19 0.61 86 2933 2.23 0.58 2.23 0.58 88 2996 1.86 0.59 1.62 0.65 88 2.1 0.53 90 3059 1.91 0.5 1.91 0.5 92 3122 2.06 0.6 2.38 0.61 92 1.75 0.59 94 3185 2.11 0.65 2.11 0.65 96 3248 1.99 0.69 1.99 0.69 98 3304.25 2.23 0.59 2.23 0.59 100 3360.5 2.06 0.54 1.88 0.4 100 2.25 0.68 102 3416.75 2.04 0.7 1.98 0.73 102 2.08 0.67 104 3473 2.12 0.91 2.12 0.91 106 3529.25 1.82 0.38 1.75 0.22 106 1.89 0.54 108 3585.5 1.7 0.43 1.62 0.32 108 1.78 0.53 110 3641.75 1.68 0.53 1.48 0.48 110 1.89 0.59 112 3698 1.61 0.54 1.49 0.39 112 1.73 0.69 114 3754.25 1.75 0.55 1.67 0.43 114 1.84 0.68 116 3810.5 1.87 0.57 1.79 0.49 116 1.95 0.66 118 3866.75 1.6 0.63 1.58 0.57 118 1.61 0.7 120 3923 1.88 0.47 1.79 0.32 120 120 120 1.97 0.62 122 3996.56 1.72 0.5 1.52 0.42 122 1.92 0.57 124 4070.12 1.65 0.4 1.58 0.27 124 1.73 0.52 126 4143.68 1.67 0.45 1.69 0.59 126 1.65 0.31 128 4217.24 1.52 0.37 1.28 0.37 128 128 128 1.76 0.36 130 4290.8 1.8 0.59 1.7 0.56 130 1.89 0.61 132 4364.37 1.73 0.5 1.55 0.34 132 1.91 0.66 134 4437.93 1.57 0.29 1.3 0.09 134 1.84 0.49 136 4511.49 1.61 0.42 1.51 0.44 136 1.72 0.4 138 4585.05 1.66 0.5 1.91 0.69 138 138 138 1.41 0.3 140 4658.61 1.66 0.42 1.84 0.4 140 1.49 0.43 142 4732.17 1.78 0.51 1.8 0.54 142 1.76 0.48 144 4805.73 1.8 0.39 1.76 0.35 144 1.83 0.43 146 4879.29 1.96 0.34 1.94 0.38 146 1.98 0.3 148 4952.85 1.87 0.29 2.02 0.35 148 148 1.71 0.23 150 5026.41 1.6 0.19 1.64 0.31 150 1.55 0 150 1.61 0.25 151 5063.2 1.95 0.4 1.95 0.4 153 153 5136.76 1.93 0.58 1.93 0.58 155 5210.32 1.76 0.52 1.76 0.52 157 5283.88 1.68 0.3 1.68 0.3 157 159 5357.44 1.8 0.48 1.8 0.48 161 5431 1.65 0.4 1.65 0.4 161 163 5495.65 1.46 0.37 1.46 0.37 163 165 5560.29 1.93 0.43 1.93 0.43 167 5624.94 1.6 0.39 1.6 0.39 169 5689.59 1.8 0.4 1.8 0.4 169 171 5754.24 1.8 0.55 1.8 0.55 173 5818.88 1.66 0.43 1.66 0.43 175 5883.53 1.47 0.29 1.47 0.29 177 5948.18 1.56 0.16 1.56 0.16 179 6012.82 1.74 0.43 1.74 0.43 181 6077.47 1.58 0.44 1.58 0.44 183 6142.12 1.4 0.35 1.4 0.35 185 6206.76 1.69 0.48 1.69 0.48 187 6271.41 1.65 0.54 1.65 0.54 189 6336.06 1.61 0.26 1.61 0.26 191 6400.71 1.66 0.41 1.66 0.41 191 193 6465.35 1.53 0.29 1.53 0.29 195 6530 1.48 0.27 1 0.09 195 1.96 0.46 197 6551.68 1.4 -0.01 1.4 -0.01 199 6573.37 1.56 0.27 1.56 0.27 199 199.5 6578.79 1.65 0.25 1.77 0.3 199.5 1.53 0.19 200.5 6589.63 1.71 0.36 1.79 0.41 200.5 1.69 0.39 200.5 1.65 0.28 201.5 6600.47 1.52 0.12 1.51 0.16 201.5 1.52 0.09 202.5 6611.32 1.5 0.18 1.79 0.27 202.5 1.25 0.03 202.5 1.46 0.24 203.5 6622.16 1.79 0.33 1.84 0.32 203.5 1.74 0.33 204.5 6633 1.42 -0.02 1.86 0.17 204.5 1.15 -0.22 204.5 1.26 0 205.5 6666.67 1.53 0.04 1.31 -0.15 205.5 1.74 0.24 206.5 6700.33 1.63 0.19 1.81 0.32 206.5 1.38 0.08 206.5 1.71 0.16 208.5 6767.67 1.62 0.1 1.76 0.28 208.5 1.48 -0.09 210.5 6835 1.64 0.18 1.64 0.18 212.5 6902.33 1.58 0.22 1.58 0.22 212.5 214.5 6969.67 1.65 0.29 1.65 0.29 214.5 216.5 7037 1.59 0.27 1.59 0.27 218.5 7104.33 1.48 0.08 1.48 0.08 218.5 220.5 7171.67 1.38 -0.13 1.38 -0.13 221.5 7205.33 1.02 -0.49 1.02 -0.49 222.5 7239 1.62 0.33 1.62 0.33 224.5 7306.33 1.47 -0.04 1.47 -0.04 226.5 7373.67 1.54 0.15 1.54 0.15 228.5 7441 1.31 0.01 1.31 0.01 230.5 7508.33 1.08 -0.29 1.02 -0.33 230.5 1.14 -0.24 232.5 7575.67 1.3 -0.08 1.38 0.05 232.5 1.21 -0.22 234.5 7643 1.43 0.3 1.43 0.3 236.5 7796.33 0.95 -0.1 0.95 -0.1 237.5 7873 0.96 0.05 0.96 0.05 238.5 7949.67 1.37 0.08 1.37 0.08 238.5 239.5 8026.33 1.07 -0.02 1.07 -0.02 240.5 8103 0.98 -0.14 1.17 0.08 240.5 0.79 -0.36 241.5 8158.12 1.01 -0.29 1.01 -0.29 242.5 8213.25 1.25 0.04 1.25 0.04 243.5 8268.38 0.82 -0.02 0.82 -0.02 244.5 8323.5 1.14 -0.22 1.14 -0.22 245.5 8378.62 0.95 -0.12 0.95 -0.12 246.5 8433.75 1.31 -0.05 1.31 -0.05 247.5 8488.88 0.84 -0.06 0.84 -0.06 248.5 8544 0.98 -0.33 0.98 -0.33 249.5 8561.05 1.15 0.03 1.15 0.03 250.5 8578.09 1.49 0.11 1.49 0.11 251.5 8595.14 1.37 -0.14 1.37 -0.14 252.5 8612.18 1.04 -0.23 1.04 -0.23 253.5 8629.23 1.26 0.01 1.26 0.01 254.5 8646.27 1.9 -0.07 1.9 -0.07 255.5 8663.32 1.52 0.14 1.52 0.14 256.5 8680.36 1.86 0.05 1.86 0.05 257.5 8697.41 0.87 0.03 0.87 0.03 258.5 8714.45 1.38 -0.08 1.23 -0.09 258.5 1.52 -0.06 260.5 8748.55 1.65 0.11 1.81 0.17 260.5 1.49 0.06 261.5 8765.59 1.1 -0.2 1.1 -0.2 262.5 8782.64 1.93 0.15 1.93 0.15 264.5 8816.73 1.35 -0.23 1.35 -0.23 266.5 8850.82 1.38 -0.01 1.38 -0.01 267.5 8884.91 1.84 0.35 1.84 0.35 268.5 8919 1.59 0.06 1.59 0.06 270.5 8948.42 1.83 0.12 1.83 0.12 272.5 8977.84 2.09 0.21 2.09 0.21 274.5 1.21 -0.15 1.24 -0.02 274.5 1.17 -0.27 276.5 9007.25 1.74 -0.09 1.74 -0.09 276.5 278.5 9036.67 1.76 0.02 1.76 0.02 280.5 9066.09 1.49 0.07 1.49 0.07 280.5 282.5 9095.51 1.82 0.26 1.82 0.26 284.5 9124.92 1.67 0.2 1.67 0.2 286.5 9154.34 1.87 0.29 1.87 0.29 288.5 9183.76 1.66 0.05 1.66 0.05 290.5 9213.18 1.44 0.04 1.44 0.04 292.5 9242.59 1.68 0.31 1.68 0.31 294.5 9272.01 1.51 0.11 1.51 0.11 296.5 9301.43 1.61 -0.05 1.61 -0.05 298.5 9330.85 1.82 0.04 1.82 0.04 300.5 9360.27 1.83 0.2 1.83 0.2 305 9426.46 1.66 -0.01 1.66 -0.01 309 9485.29 1.72 0.15 1.72 0.15 313 9529.19 1.59 0.19 1.59 0.19 317 9568.11 1.9 0.19 1.9 0.19 321 9607.02 1.99 0.17 1.99 0.17 325 9645.94 1.99 0.03 1.99 0.03 329 9684.86 2.16 0.13 2.16 0.13 333 9723.78 2.21 0.28 2.21 0.28 337 9762.69 1.5 -0.13 1.5 -0.13 341 9801.61 1.97 0.21 1.97 0.21 345 9840.53 1.9 0.13 1.9 0.13 349 9879.45 1.87 0.2 1.87 0.2 353 9918.36 1.97 0.02 1.97 0.02 357 9957.28 2.1 0.03 2.1 0.03 361 9996.2 2.16 0.1 2.16 0.1 365 10035.12 2.14 0.13 2.14 0.13 369 10074.04 2.31 0.13 2.31 0.13 373 10112.95 2 0 2.34 0.18 373 1.65 -0.17 377 10151.87 2.08 0.05 2.08 0.05 381 10190.79 1.88 -0.02 1.88 -0.02 385 10229.71 2.48 0.12 2.48 0.12 389 10268.62 2.21 0.18 2.21 0.18 393 10307.54 2.23 0.11 2.23 0.11 397 10346.46 2.1 0.08 2.13 0.18 397 2.07 -0.02 401 10385.38 2.4 0.03 2.4 0.03 405 10424.29 1.87 0.02 1.87 0.02 409 10463.21 1.98 -0.06 1.98 -0.06 413 10502.13 2.14 0.03 2.14 0.03 417 10541.05 2.18 -0.03 2.18 -0.03 421 10579.96 2.23 0.15 2.23 0.15 425 10618.88 2.25 0.1 2.25 0.1 429 10657.8 2.24 0.27 2.24 0.27 433 10696.72 2.3 0.13 2.3 0.13 437 10735.64 2.25 -0.03 2.53 0.02 437 1.96 -0.08 441 10774.55 2.53 0.18 2.53 0.18 445 10813.47 2.52 0.09 2.52 0.09 449 10852.39 2.53 0.18 2.53 0.18 453 10891.31 1.89 0.02 1.89 0.02 3b. C. wuellerstorfi Stable isotope data, Core OCE326 26GGC depth cal age d13C d18-O cm yrs B.P. C.wuell. C.wuell. 50 1780.33 0.51 2.78 52 1845.67 0.93 2.79 56 1976.33 0.41 2.74 58 2041.67 1.38 2.83 60 2107 1.28 2.73 62 2172.33 1.02 2.71 64 2237.67 1.06 2.83 66 2303 0.95 2.78 68 2366 0.53 2.81 70 2429 0.64 2.8 72 2492 0.94 2.57 74 2555 1.1 2.69 78 2681 0.63 2.02 80 2744 1.21 2.7 82 2807 1.06 2.77 88 2996 0.86 2.81 90 3059 0.53 2.8 96 3248 0.94 2.8 98 3304.25 0.95 2.87 100 3360.5 0.95 2.75 102 3416.75 0.83 2.68 104 3473 0.71 2.77 106 3529.25 0.52 2.92 108 3585.5 0.95 2.78 110 3641.75 0.85 2.83 114 3754.25 0.89 2.67 116 3810.5 0.8 2.77 118 3866.75 0.61 2.77 120 3923 0.23 2.74 122 3996.56 0.74 2.82 124 4070.12 0.83 2.7 126 4143.68 0.99 2.68 128 4217.24 0.83 2.62 130 4290.8 0.67 2.74 132 4364.37 0.7 2.75 134 4437.93 1.08 2.75 136 4511.49 0.97 2.77 138 4585.05 0.14 2.85 140 4658.61 0.85 2.63 142 4732.17 0.77 2.71 144 4805.73 0.22 2.77 146 4879.29 0.59 2.67 148 4952.85 0.63 2.83 150 5026.41 0.64 2.83 151 5063.2 0.31 2.61 153 5136.76 0 2.78 153 5136.76 1.17 2.85 155 5210.32 0.41 2.72 157 5283.88 -0.15 2.77 159 5357.44 0.98 2.83 161 5431 1 2.71 163 5495.65 0.42 2.77 165 5560.29 0.31 2.71 167 5624.94 0.65 2.75 169 5689.59 0.9 2.89 171 5754.24 0.56 2.77 173 5818.88 1.05 2.82 177 5948.18 1.01 2.62 179 6012.82 1 2.57 181 6077.47 1.05 2.74 183 6142.12 1.07 2.76 187 6271.41 1.03 2.7 189 6336.06 1.06 2.73 191 6400.71 1 2.76 193 6465.35 0.97 2.73 195 6530 0.86 2.78 199 6573.37 0.95 2.67 200.5 6589.63 0.99 2.77 201.5 6600.47 0.83 2.69 202.5 6611.32 0.71 2.74 203.5 6622.16 1.01 2.71 204.5 6633 0.34 2.66 205.5 6666.67 0.11 2.73 206.5 6700.33 0.92 2.74 208.5 6767.67 0.44 2.79 214.5 6969.67 1.19 2.76 216.5 7037 1.12 2.91 218.5 7104.33 1.14 2.81 222.5 7239 1.07 2.84 226.5 7373.67 1 2.86 228.5 7441 0.53 2.85 232.5 7575.67 1.28 2.91 234.5 7643 0.89 2.85 236.5 7796.33 0.18 3.04 238.5 7949.67 0.29 2.84 240.5 8103 0.02 2.95 242.5 8213.25 0.34 2.86 244.5 8323.5 0.23 2.85 248.5 8544 0.98 2.89 256.5 8680.36 0.78 2.99 258.5 8714.45 0.75 2.76 262.5 8782.64 0.86 2.79 264.5 8816.73 0.66 2.8 266.5 8850.82 0.18 2.92 270.5 8919 0.56 2.73 272.5 8948.42 1.02 2.98 274.5 8977.84 0.53 2.89 276.5 9007.25 0.53 2.83 278.5 9036.67 0.37 2.9 280.5 9066.09 0.33 2.7 282.5 9095.51 0.35 2.92 286.5 9154.34 1.05 2.78 288.5 9183.76 1.01 2.81 290.5 9213.18 0.54 2.43 292.5 9242.59 0.58 2.74 294.5 9272 0.39 2.77 4. Cd/Ca data at OCE326 26GGC depth CalibAge EditedAvg. Cd/Ca Repl.Cd/Ca RejectData Cd/Ca cm yrB.P. Cd/Ca N.umbo N.umbo N.umbo C.wueller. 199.5 6579 0.097 0.097 202 6605 0.098 0.098 204.5 6633 0.066 0.167 0.066 0.167 205 6650 0.065 205.5 6667 0.063 0.03 0.096 209.5 6801 0.05 0.062 0.037 213.5 6936 0.037 0.037 221.7 7213 0.044 0.187 0.044 0.187 226.3 7370 0.101 230 7491 0.058 0.058 235.5 7720 0.042 0.042 239.5 8026 0.188 0.188 240 8065 0.097 241 8158 0.053 0.053 244 8296 0.041 0.041 247 8461 0.038 0.038 256.5 8680 0.041 0.041 264 8808 0.097 0.097 283.5 9110 0.029 0.029 5a. Data from OCE326 MC25B: N. pachy left iso data, Avg. depth CalibAge Avg d18O cm yrsB.P. N.pachy.s. 0.5 19.81 2.01 1.5 59.43 1.94 2.5 99.05 2.43 3.5 138.67 2.36 4.5 178.29 2.16 5.5 217.9 2.16 6.5 257.52 1.93 7.5 297.14 2.28 8.5 336.76 1.9 9.5 376.38 2.18 10.5 416 2.14 11.5 452.59 2.19 12.5 489.18 2.22 13.5 525.77 2.09 14.5 562.36 2.03 15.5 598.95 2.13 16.5 635.55 2.19 17.5 672.14 2.12 18.5 708.73 2.31 19.5 745.32 1.83 20.5 781.91 1.71 21.5 818.5 2.24 22.5 855.09 2.15 23.5 891.68 2.21 24.5 928.27 2.02 25.5 964.86 2.03 26.5 1001.45 2.27 27.5 1038.05 2.08 28.5 1074.64 2.21 29.5 1111.23 2.28 30.5 1147.82 2.31 31.5 1184.41 2.16 32.5 1221 1.92 33.5 1252.55 2.23 34.5 1284.09 2.13 35.5 1315.64 1.93 36.5 1347.18 2.09 37.5 1378.73 2.03 38.5 1410.27 2.19 39.5 1441.82 2.49 40.5 1473.36 2.14 41.5 1504.91 2.24 42.5 1536.45 1.93 44.5 1600.67 1.88 45.5 1633.33 2.03 46.5 1666 2.09 47.5 1698.67 2.2 5b. Data from OCE326 MC25B: N. pachy left iso data depth d13C d18O d18Oreject d13Creject cm N.pac.s N.pac.s N.pac.s N.pac.s. 0.5 0.5 2.01 1.5 0.7 1.98 1.5 0.25 1.89 2.5 0.6 2.43 3.5 0.84 2.36 4.5 0.66 2.16 5.5 0.59 2.16 6.5 0.49 1.93 7.5 0.71 2.28 8.5 0.7 1.9 9.5 0.73 2.18 10.5 0.62 2.14 11.5 1.44 0.39 11.5 0.63 2.19 12.5 0.64 2.22 13.5 0.64 2.09 14.5 0.57 2.03 15.5 0.61 2.13 16.5 0.69 2.19 17.5 0.64 2.12 18.5 0.79 2.31 19.5 0.53 1.83 20.5 0.37 1.71 21.5 0.49 2.24 22.5 0.43 2.15 23.5 0.59 2.21 24.5 0.4 2.02 25.5 0.54 2.03 26.5 0.67 2.27 27.5 0.54 2.08 28.5 0.48 2.21 29.5 0.61 2.28 30.5 0.63 2.31 31.5 0.51 2.16 32.5 0.49 1.92 33.5 0.57 2.23 34.5 0.39 2.13 35.5 0.61 1.93 36.5 0.62 2.09 37.5 0.67 2.03 38.5 0.63 2.19 39.5 0.44 2.49 40.5 0.45 2.14 41.5 0.24 2.24 42.5 0.48 1.93 44.5 0.44 1.88 45.5 0.49 2.03 46.5 0.63 2.09 47.5 0.63 2.2 5c. Data from OCE326 MC25B: C. wuellerstorfi iso data depth CalibAge d13C d18O cm yrsB.P. C.wuell. C.wuell. 0.5 19.81 1.05 2.76 1.5 59.43 1.1 2.76 2.5 99.05 0.58 2.78 3.5 138.67 1.09 2.82 4.5 178.29 1.15 2.78 5.5 217.9 1.01 2.74 6.5 257.52 1.19 2.81 7.5 297.14 1.04 2.75 8.5 336.76 1.14 2.7 9.5 376.38 0.86 2.73 10.5 416 1.28 2.84 11.5 452.59 1.22 2.81 12.5 489.18 1.24 2.85 14.5 562.36 0.88 2.83 15.5 598.95 1.23 2.79 16.5 635.55 1.33 2.55 17.5 672.14 0.42 2.69 18.5 708.73 1.09 2.84 19.5 745.32 1.09 2.12 20.5 781.91 1.04 2.68 21.5 818.5 1.02 2.81 22.5 855.09 1.13 2.47 23.5 891.68 1.08 2.73 24.5 928.27 1.27 2.65 25.5 964.86 1.28 2.49 26.5 1001.45 1.1 2.6 27.5 1038.05 1.54 2.99 28.5 1074.64 1.3 2.41 29.5 1111.23 1.44 2.61 30.5 1147.82 1.76 2.87 31.5 1184.41 1.13 2.87 32.5 1221 1.14 2.73 33.5 1252.55 1.01 2.84 34.5 1284.09 0.48 2.72 35.5 1315.64 1.2 2.71 36.5 1347.18 1.02 2.8 37.5 1378.73 0.92 2.77 38.5 1410.27 1.07 2.8 39.5 1441.82 1.3 2.85 40.5 1473.36 1.31 2.87 41.5 1504.91 1.08 2.84 42.5 1536.45 1.14 2.82 43.5 1568 1.16 2.79 44.5 1600.67 0.97 2.84 45.5 1633.33 1.3 2.84 46.5 1666 1.18 2.75 47.5 1698.67 1.23 2.78 6. N. pachyderma s. abundance near 8.2 ka event, OCE326 26GGC depth Calibrated mass(g) split N.pac.s. otherPF totalPF %N.pac.s. note cm Age,yrsB.P. >150 >150 221.5 7205.33 14.86 32 23 320 343 6.6% 230 7491.50 19.97 32 29 272 301 9.5% 237.5 7873.00 4.67 8 85 181 266 31.9% total count <300 239.5 8026.33 14.29 16 131 292 423 31.0% 241.5 8158.13 7.93 8 59 271 330 17.8% 243.5 8268.38 5.79 8 88 235 323 27.3% 245.5 8378.63 6.3 8 79 142 221 35.7% total count <300 247.5 8488.88 4.21 8 97 303 400 24.2% 249.5 8561.05 3.48 4 95 262 357 26.5% 251.5 8595.14 5.56 4 86 232 318 27.1% 253.5 8629.23 4.5 4 108 317 425 25.4% 255.5 8663.32 3.99 4 120 244 364 32.9% 257.5 8697.41 5.39 8 67 349 415 16.0% 259.5 8731.50 4.66 4 76 346 422 18.0% 261.5 8765.59 9.39 8 64 266 330 19.4% 267.5 8867.86 7.33 4 95 556 650 14.6% 7. Alkenone SST, Core GGC26 Depth CalibAge alkenone alkenone cm yrsBP SST conc(ng/g) 2.5 99 8.32 955.48 6.5 257.5 8.31 1005.91 10.5 416 8.44 1070.63 14.5 562.4 8.66 1140.44 18.5 708.7 9.4 1067.69 22.5 855.1 9.55 941.27 26.5 1001.5 9.15 1113.89 30.5 1147.8 8.86 1102.26 34.5 1284.1 9.59 1010.77 38.5 1410.3 9.7 798.98 42.5 1536.5 9.09 752.21 46.5 1666 9.33 1049.93 50.5 1796.7 9.65 975.61 54.5 1927.3 9.77 937.06 58.5 2058 9.58 1000.94 62.5 2188.7 10 888.2 67 2334.5 9.75 889.33 70.5 2444.8 10.01 780.9 74.5 2570.8 9.47 756.84 78.5 2696.8 9.95 722.73 82.5 2822.8 11.08 610.96 86.5 2948.8 9.55 659.28 90.5 3074.8 9.68 731.53 94.5 3200.8 10.16 664.21 98.5 3318.3 10.7 579.24 102.5 3430.8 10.14 642.26 106.5 3543.3 10.29 723.6 110.5 3655.8 10.24 734 114.5 3768.3 10.58 713.65 118.5 3880.8 10.22 555.85 122.5 4015 10.07 467.03 126.5 4162.1 10.61 597.47 130.5 4309.2 10.97 457.67 134.5 4456.3 10.64 456.94 138.5 4603.4 10.77 517.1 142.5 4750.6 11.11 616.2 146.5 4897.7 11.51 438.06 150.5 5044.8 11.12 685.31 154 5173.5 11.19 753.07 156.5 5265.5 11.19 659.25 160.5 5412.6 11.12 508.99 164.5 5544.1 11.79 563.88 168.5 5673.4 11.39 438.17 172.5 5802.7 11.87 475.54 176.5 5932 11.89 703.14 180.5 6061.3 12.05 521.7 184.5 6190.6 12.07 468.75 188.5 6319.9 11.99 518.62 192.5 6449.2 12.11 623.82 196.5 6546.3 12.55 650.07 200.5 6589.6 12.51 571.42 204.5 6633 12.65 676.73 208.5 6767.7 12.95 733.37 212.5 6902.3 12.94 727.88 216.5 7037 12.82 761.29 220.5 7171.7 12.67 741.79 224.5 7306.3 12.71 600.6 228.5 7441 12.75 440.42 232.5 7575.7 12.27 522.72 236.5 7796.3 13.29 396.8 240.5 8103 15.16 447.62 244.5 8323.5 14.73 322.74 248.5 8544 15.31 380.9 252.5 8612.2 15.37 388.17 256.5 8680.4 15.42 364.27 260.5 8748.5 16.47 448.8 264.5 8816.7 16.19 402.13 268.5 8884.9 16.36 418.9 272.5 8948.4 15.55 388.94 276.5 9007.3 16.08 417.53 280.5 9066.1 16.25 421.03 282.5 9095.5 16.09 448.77 286.5 9154.3 15.54 430.03 290.5 9213.2 15.91 443.39 294.5 9272 15.88 461.44 300.5 9360.3 15.61 419.61 305 9426.5 16.33 275.64 309 9485.3 16.43 406.1 313 9529.2 16.38 369.41 317 9568.1 16.5 435.76 325 9645.9 16.01 459.83 329 9684.9 16.26 270.83 333 9723.8 16.18 336.7 341 9801.6 16.68 345.35 345 9840.5 17.04 362.85 349 9879.4 16.94 344.24 353 9918.4 16.69 380.23 357 9957.3 16.7 391.72 361 9996.2 16.75 347.86 365 10035.1 16.39 324.02 369 10074 16.99 265.49 373 10113 17.34 288.9 377 10151.9 16.4 296.02 385 10229.7 15.64 411.9 389 10268.6 16.38 324.8 393 10307.5 16.42 351.25 397 10346.5 15.96 341.95 401 10385.4 17.19 336.74 405 10424.3 17.13 293.64 409 10463.2 17.4 290.01 413 10502.1 17.4 224.32 417 10541 17.38 262.74 421 10580 17.35 325.26 425 10618.9 17.04 290.74 429 10657.8 17.37 316.04 433 10696.7 18.63 283.33 437 10735.6 18.18 299.97 441 10774.6 17.47 288.87 445 10813.5 17.36 250.33 449 10852.4 18.14 340.88 453 10891.3 17.91 260.31 8a. G. bulloides Mg/Ca SST depth CalibAge Mg/Ca Sr/Ca Mn/Ca SST SST cm yrs B.P. Bark.Eld. Eld.Gans. 1.5 59.43 2.07 1.337 16 10.6 13.07 26 964.86 2.551 1.353 257 12.6 15.16 50 1780.33 2.608 1.375 374 12.9 15.38 76 2618.00 2.408 1.369 500 12.1 14.59 100 3360.50 2.514 1.342 466 12.5 15.02 126 4143.68 2.109 1.354 435 10.7 13.26 150 5026.41 2.266 1.367 653 11.5 13.98 175 5883.53 2.198 1.346 667 11.2 13.67 201 6589.63 2.288 1.322 755 11.6 14.07 225 7306.33 2.566 1.34 494 12.7 15.22 232.5 7575.67 2.984 1.357 616 14.2 16.73 237 7873.00 2.61 1.317 492 12.9 15.39 240.5 8103.00 2.951 1.356 383 14.1 16.62 245 8323.50 2.659 1.329 478 13.1 15.58 249 8544.00 2.602 1.318 412 12.8 15.36 253 8612.18 2.921 1.328 487 14 16.52 257 8680.36 2.603 1.313 462 12.9 15.36 260.5 8748.55 2.257 1.35 245 11.4 13.94 265 8816.73 2.438 1.341 426 12.2 14.71 277 9007.25 2.333 1.333 396 11.8 14.27 300.5 9360.27 2.191 1.351 250 11.1 13.64 325 9645.94 2.343 1.352 390 11.8 14.31 349 9879.45 2.555 1.381 460 12.7 15.18 373 10112.95 2.651 1.393 884 13 15.55 397 10346.46 2.353 1.394 468 11.8 14.36 437 10735.64 2.378 1.381 747 11.9 14.46 8b. G. Bulloides d18O SST data, ice volume corrected composite d18O d18O d18O depth CalAge G.bull. G.bull. cm yrsB.P. IceVolCorr. raw 1.5 52.14 0.61 0.63 25.5 975.23 0.37 0.4 50 1798.07 0.7 0.74 76 2602.33 0.54 0.59 100 3333.67 0.32 0.38 126 4104.28 0.7 0.76 150 4933.40 1.06 1.12 175 5797.07 0.79 0.87 200.5 6557.47 0.65 0.76 224.5 7274.67 -0.02 0.13 232.5 7541.33 0.29 0.46 236.5 7737.29 0.29 0.47 240.5 7995.86 0.11 0.29 244.5 8254.43 -0.01 0.18 248.5 8513.00 0.2 0.41 252.5 8574.40 0.26 0.47 256.5 8635.80 -0.2 0.02 260.5 8697.20 -0.02 0.2 264.5 8758.59 -0.48 -0.26 276.5 8942.79 -0.16 0.08 325 9608.23 -0.11 0.17 349 9850.20 0.12 0.42 373 10092.17 0.36 0.68 397 10333.00 0.57 0.93 437 10723.00 0.7 1.12 8c. N. pachyderma (s.) Mg/Ca SST depth CalibAge Mg/Ca Sr/Ca Mn/Ca SST SST cm yrsB.P. Eld.Gans. reject 1.5 59.43 1.416 1.396 9 8.6 26 964.86 1.466 1.379 52 8.9 50 1780.33 2.865 1.353 49 15.6 76 2618.00 1.144 1.398 57 6.4 100 3360.50 0.998 1.42 54 5.1 126 4143.68 1.42 1.409 46 8.6 150 5026.41 1.346 1.395 56 8.1 175 5883.53 1.096 1.4 90 6 201 6589.63 1.29 1.408 63 7.7 225 7306.33 1.375 1.402 68 8.3 232.5 7575.67 1.41 1.403 48 8.5 237 7873.00 1.387 1.394 59 8.4 240.5 8103.00 1.98 1.385 58 11.9 245 8323.50 1.054 1.392 26 5.6 249 8544.00 1.317 1.394 97 7.9 253 8612.18 1.175 1.405 71 6.7 257 8680.36 2.002 1.385 81 12 260.5 8748.55 1.283 1.391 79 7.6 265 8816.73 1.257 1.401 88 7.4 277 9007.25 1.273 1.38 85 7.5 300.5 9360.27 1.101 1.386 88 6.1 325 9645.94 1.095 1.394 70 6 349 9879.45 1.171 1.394 90 6.7 373 10112.95 1.166 1.604 56 6.6 397 10346.46 1.124 1.782 48 6.3 437 10735.64