Northwest Atlantic Slope Holocene Alkenone SST Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Northwest Atlantic Slope Holocene Alkenone SST Data LAST UPDATE: 2/2008 (Original receipt by WDC Paleo) CONTRIBUTOR: Julian Sachs, University of Washington IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2008-011 SUGGESTED DATA CITATION: Sachs, J.P.. 2008. Northwest Atlantic Slope Holocene Alkenone SST Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2008-011. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Sachs, J. P.. 2007. Cooling of Northwest Atlantic slope waters during the Holocene. Geophys. Res. Lett., 34, L03609, doi:10.1029/2006GL028495. ABSTRACT: Climate of the last 11,000 years, the Holocene, is usually described as warm and stable. Benchmark temperature records from central Greenland ice cores show none of the large, abrupt variations that characterized the prior 100,000 years of glacial climate. Nor do they show any substantial trend, indicating at most 1º–3ºC of cooling. Here we show that the slope waters east of the United States and Canada cooled 4º-10ºC during the Holocene. Declining insolation, increasing convection in the Labrador Sea, and equatorward shifting of the Gulf Stream path may have caused the cooling. GEOGRAPHIC REGION: Western North Atlantic PERIOD OF RECORD: 11 KYrBp - present DESCRIPTION: Alkenone data and SST reconstructions for 3 sediment cores from continental slope waters east of the United States and Canada. Core locations: Laurentian Fan Core OCE326-GGC26: 43ºN, 55ºW, 3975 m Scotian Margin (Emerald Basin) Core OCE326-GGC30: 44ºN, 63ºW, 250 m Virginia Slope core CH07-98-GGC19: 36º52'N, 74º34'W, 1049 m DATA: 1. Laurentian Fan Core OCE326-GGC26 alkenone SST Column 1: Age Column 2: Depth cm. Column 3: Uk'37 alkenone Column 4: SST ºC Age Depth Uk'37 SST 0.1 2.5 0.3220 8.32 0.26 6.5 0.3215 8.31 0.42 10.5 0.3259 8.44 0.56 14.5 0.3335 8.66 0.71 18.5 0.3585 9.4 0.86 22.5 0.3637 9.55 1 26.5 0.3500 9.15 1.15 30.5 0.3403 8.86 1.28 34.5 0.3651 9.59 1.41 38.5 0.3689 9.7 1.54 42.5 0.3480 9.09 1.66 46.5 0.3561 9.33 1.79 50.5 0.3671 9.65 1.92 54.5 0.3713 9.77 2.05 58.5 0.3649 9.58 2.18 62.5 0.3789 10 2.32 67 0.3704 9.75 2.43 70.5 0.3794 10.01 2.56 74.5 0.3609 9.47 2.68 78.5 0.3774 9.95 2.8 82.5 0.4157 11.08 2.93 86.5 0.3638 9.55 3.05 90.5 0.3681 9.68 3.17 94.5 0.3845 10.16 3.29 98.5 0.4026 10.7 3.4 102.5 0.3837 10.14 3.52 106.5 0.3887 10.29 3.63 110.5 0.3873 10.24 3.74 114.5 0.3987 10.58 3.85 118.5 0.3866 10.22 3.98 122.5 0.3814 10.07 4.12 126.5 0.3999 10.61 4.26 130.5 0.4119 10.97 4.4 134.5 0.4006 10.64 4.54 138.5 0.4051 10.77 4.67 142.5 0.4167 11.11 4.81 146.5 0.4303 11.51 4.95 150.5 0.4171 11.12 5.07 154 0.4196 11.19 5.16 156.5 0.4195 11.19 5.3 160.5 0.4171 11.12 5.43 164.5 0.4400 11.79 5.57 168.5 0.4264 11.39 5.71 172.5 0.4426 11.87 5.85 176.5 0.4728 5.85 176.5 0.4433 11.89 5.99 180.5 0.4764 5.99 180.5 0.4487 12.05 6.13 184.5 0.4936 6.13 184.5 0.4492 12.07 6.26 188.5 6.26 188.5 0.4466 11.99 6.4 192.5 0.4846 6.4 192.5 0.4508 12.11 6.51 196.5 0.4899 6.51 196.5 0.4657 12.55 6.56 200.5 0.4897 6.56 200.5 0.4644 12.51 6.61 204.5 0.4968 6.61 204.5 0.4690 12.65 6.74 208.5 0.4989 6.74 208.5 0.4794 12.95 6.87 212.5 0.5007 6.87 212.5 0.4791 12.94 7.01 216.5 0.4941 7.01 216.5 0.4748 12.82 7.14 220.5 0.4697 12.67 7.27 224.5 0.4713 12.71 7.41 228.5 0.4726 12.75 7.54 232.5 0.4563 12.27 7.74 236.5 0.4907 13.29 8 240.5 0.5543 15.16 8.25 244.5 0.5397 14.73 8.51 248.5 0.5595 15.31 8.57 252.5 0.5616 15.37 8.64 256.5 0.5632 15.42 8.7 260.5 0.5989 16.47 8.76 264.5 0.5894 16.19 8.82 268.5 0.5954 16.36 8.88 272.5 0.5677 15.55 8.94 276.5 0.5856 16.08 9 280.5 0.5914 16.25 9.03 282.5 0.5862 16.09 9.1 286.5 0.5674 15.54 9.16 290.5 0.5798 15.91 9.22 294.5 0.5788 15.88 9.31 300.5 0.5696 15.61 9.38 305 0.5941 16.33 9.44 309 0.5977 16.43 9.49 313 0.5961 16.38 9.53 317 0.6001 16.5 9.57 321 0.6585 9.61 325 0.5835 16.01 9.65 329 0.5917 16.26 9.69 333 0.5891 16.18 9.73 337 9.77 341 0.6063 16.68 9.81 345 0.6185 17.04 9.85 349 0.6151 16.94 9.89 353 0.6064 16.69 9.93 357 0.6068 16.7 9.97 361 0.6085 16.75 10.01 365 0.5962 16.39 10.05 369 0.6167 16.99 10.09 373 0.6285 17.34 10.13 377 0.5966 16.4 10.17 381 0.5777 15.84 10.21 385 0.5708 15.64 10.25 389 0.5960 16.38 10.29 393 0.5973 16.42 10.37 397 0.5815 15.96 10.47 401 0.6235 17.19 10.58 405 0.6214 17.13 10.68 409 0.6307 17.4 10.78 413 0.6305 17.4 10.89 417 0.6298 17.38 10.99 421 0.6289 17.35 11.1 425 0.6183 17.04 11.2 429 0.6295 17.37 11.31 433 0.6723 18.63 11.41 437 0.6573 18.18 11.52 441 0.6329 17.47 11.62 445 0.6294 17.36 11.72 449 0.6559 18.14 11.83 453 0.6481 17.91 2. Scotian Margin Emerald Basin Core OCE326-GGC30 alkenone SST Column 1: Age Column 2: Depth cm Column 3: Uk'37 alkenone Column 4: SST ºC Age Depth Uk'37 SST 0 0.5 0.3121 8.03 0 2.5 0.3127 8.05 0 4.5 0.3187 8.23 0 6.5 0.3261 8.44 0 8.5 0.3303 8.57 0 10.5 0.3273 8.48 0 12.5 0.3355 8.72 0 14.5 0.3320 8.62 0.13 16.5 0.3249 8.41 0.38 24.5 0.3355 8.72 0.44 26.5 0.3382 8.80 0.51 28.5 0.3406 8.87 0.59 30.5 0.3402 8.86 0.7 32.5 0.3410 8.88 0.8 34.5 0.3469 9.05 0.91 36.5 0.3511 9.18 1.02 38.5 0.3539 9.26 1.12 40.5 0.3615 9.48 1.23 42.5 0.3664 9.63 1.33 44.5 0.3709 9.76 1.44 46.5 0.3509 9.17 1.44 46.5 0.3455 9.02 1.55 48.5 0.3682 9.68 1.64 50.5 0.3648 9.58 1.71 52.5 0.3633 9.54 1.79 54.5 0.3705 9.75 1.87 56.5 0.3719 9.79 1.95 58.5 0.3768 9.94 2.02 60.5 0.3838 10.14 2.1 62.5 0.3922 10.39 2.18 64.5 0.3846 10.16 2.25 66.5 0.3933 10.42 2.33 68.5 0.3970 10.53 2.41 70.5 0.3941 10.44 2.48 72.5 0.3958 10.49 2.56 74.5 0.3996 10.60 2.64 76.5 0.3985 10.57 2.71 78.5 0.4150 11.06 2.79 80.5 0.4061 10.80 2.87 82.5 0.4035 10.72 2.95 84.5 0.4035 10.72 3.02 86.5 0.4020 10.68 3.1 88.5 0.4117 10.96 3.18 90.5 0.3972 10.53 3.25 92.5 0.4076 10.84 3.33 94.5 0.4120 10.97 3.41 96.5 0.4220 11.26 3.48 98.5 0.4062 10.80 3.56 100.5 0.4096 10.90 3.64 102.5 0.4144 11.04 3.71 104.5 0.4121 10.97 3.79 106.5 0.4263 11.39 3.87 108.5 0.4232 11.30 3.95 110.5 0.4304 11.51 4.02 112.5 0.4323 11.57 4.1 114.5 0.4301 11.50 4.18 116.5 0.4297 11.49 4.25 118.5 0.4029 10.70 4.25 118.5 0.3984 10.57 4.33 120.5 0.4066 10.81 4.33 120.5 0.4048 10.76 4.41 122.5 0.4262 11.39 4.48 124.5 0.4523 12.16 4.56 126.5 0.4370 11.71 4.64 128.5 0.4430 11.88 4.71 130.5 0.4355 11.66 4.87 134.5 0.4312 11.54 4.95 136.5 0.4448 11.93 5.02 138.5 0.4496 12.08 5.1 140.5 0.4473 12.01 5.18 142.5 0.4566 12.28 5.25 144.5 0.4437 11.90 5.33 146.5 0.4209 11.23 5.33 146.5 0.4196 11.19 5.41 148.5 0.4582 12.33 5.48 150.5 0.4599 12.38 5.56 152.5 0.4797 12.96 5.64 154.5 0.4894 13.25 5.71 156.5 0.4868 13.17 5.79 158.5 0.4946 13.40 5.87 160.5 0.4731 12.77 5.94 162.5 0.4688 12.64 6.02 164.5 0.5086 13.81 6.1 166.5 0.5059 13.73 6.18 168.5 0.4992 13.53 6.25 170.5 0.4395 11.78 6.25 170.5 0.4373 11.72 6.33 172.5 0.4977 13.49 6.41 174.5 0.4673 12.60 6.41 174.5 0.4754 12.84 6.48 176.5 0.4993 13.54 6.56 178.5 0.5016 13.60 6.64 180.5 0.5045 13.69 6.71 182.5 0.5008 13.58 6.79 184.5 0.5179 14.09 6.87 186.5 0.5222 14.21 6.94 188.5 0.5408 14.76 7.01 190.5 0.5310 14.47 7.08 192.5 0.5213 14.19 7.15 194.5 0.5385 14.69 7.22 196.5 0.5321 14.50 7.29 198.5 0.5365 14.63 7.36 200.5 0.4817 13.02 7.43 202.5 0.5498 15.02 7.5 204.5 0.5544 15.16 7.57 206.5 0.5482 14.98 7.64 208.5 0.5404 14.75 7.71 210.5 0.5279 14.38 7.78 212.5 0.5375 14.66 7.85 214.5 0.5425 14.81 7.92 216.5 0.5395 14.72 7.99 218.5 0.5319 14.50 8.06 220.5 0.5220 14.21 8.13 222.5 0.5422 14.80 8.2 224.5 0.5546 15.17 8.27 226.5 0.5386 14.69 8.34 228.5 0.5336 14.55 8.41 230.5 0.5342 14.57 8.48 232.5 0.5327 14.52 8.55 234.5 0.5310 14.47 8.62 236.5 0.5285 14.40 8.69 238.5 0.5250 14.29 8.76 240.5 0.5182 14.09 8.83 242.5 0.5236 14.25 8.9 244.5 0.5374 14.66 8.97 246.5 0.5150 14.00 9.04 248.5 0.4822 13.03 9.11 250.5 0.5193 14.13 9.18 252.5 0.5323 14.51 9.25 254.5 0.5146 13.99 9.32 256.5 0.5196 14.13 9.39 258.5 0.5268 14.35 9.46 260.5 0.5328 14.52 9.53 262.5 0.5373 14.66 9.6 264.5 0.5290 14.41 9.67 266.5 0.5640 15.44 9.74 268.5 0.5493 15.01 9.81 270.5 0.5446 14.87 9.88 272.5 0.5398 14.73 9.95 274.5 0.5581 15.27 10.02 276.5 0.5483 14.98 10.09 278.5 0.5517 15.08 10.16 280.5 0.5433 14.83 10.23 282.5 0.5280 14.38 10.3 284.5 0.5505 15.04 10.37 286.5 0.5340 14.56 10.44 288.5 0.5533 15.13 10.52 290.5 0.5414 14.78 10.59 292.5 0.5343 14.57 10.66 294.5 0.5278 14.38 10.73 296.5 0.5315 14.49 10.8 298.5 0.5281 14.39 10.87 300.5 0.5221 14.21 10.94 302.5 0.5057 13.73 11.01 304.5 0.5184 14.10 11.08 306.5 0.5289 14.41 11.15 308.5 0.5202 14.15 11.22 310.5 0.5028 13.64 11.29 312.5 0.5060 13.73 11.36 314.5 0.5107 13.87 11.43 316.5 0.5081 13.80 11.5 318.5 0.5064 13.75 11.57 320.5 0.5001 13.56 11.64 322.5 0.5037 13.67 11.71 324.5 0.5036 13.67 11.78 326.5 0.5075 13.78 11.85 328.5 0.5109 13.88 11.92 330.5 0.4748 12.82 11.99 332.5 0.4865 13.16 12.06 334.5 0.4739 12.79 12.13 336.5 0.4913 13.30 12.2 338.5 0.4955 13.43 12.27 340.5 0.5136 13.96 12.35 342.5 0.5111 13.89 12.42 344.5 0.5051 13.71 12.49 346.5 0.4946 13.40 12.56 348.5 0.5118 13.91 12.63 350.5 0.5110 13.88 12.71 352.5 0.5183 14.10 12.78 354.5 0.5126 13.93 12.85 356.5 0.5208 14.17 12.92 358.5 0.5210 14.18 3. Virginia Slope Core CH07-98, GGC-19 alkenone SST Column 1: Age Column 2: Depth cm Column 3: Uk'37 alkenone Column 4: SST ºC Age Depth Uk'37 SST 0.52 0.5 0.5337 14.55 0.59 2.5 0.5316 14.49 0.67 4.5 0.5298 14.43 0.74 6.5 0.5297 14.43 0.82 8.5 0.5297 14.43 0.89 10.5 0.5377 14.67 0.89 10.5 0.5544 15.16 0.96 12.5 0.5436 14.84 1.04 14.5 0.5469 14.94 1.11 16.5 0.5361 14.62 1.18 18.5 0.5329 14.53 1.26 20.5 0.5628 15.41 1.33 22.5 0.5561 15.21 1.4 24.5 0.5522 15.09 1.48 26.5 0.5605 15.34 1.55 28.5 0.5541 15.15 1.62 30.5 0.5568 15.23 1.7 32.5 0.5459 14.91 1.77 34.5 0.5394 14.72 1.84 36.5 0.5443 14.86 1.92 38.5 0.5479 14.97 1.99 40.5 0.5571 15.24 1.99 40.5 0.5694 15.6 2.07 42.5 0.5761 15.8 2.14 44.5 0.5639 15.44 2.21 46.5 0.5818 15.96 2.29 48.5 0.5868 16.11 2.36 50.5 0.5825 15.98 2.43 52.5 0.5898 16.2 2.51 54.5 0.5842 16.04 2.58 56.5 0.5844 16.04 2.65 58.5 0.5817 15.96 2.73 60.5 0.5864 16.1 2.8 62.5 0.5881 16.15 2.87 64.5 0.5821 15.97 2.95 66.5 0.6068 16.7 3.02 68.5 0.6003 16.51 3.1 70.5 0.5830 16 3.17 72.5 0.5855 16.07 3.24 74.5 0.5838 16.02 3.32 76.5 0.5845 16.04 3.39 78.5 0.5950 16.35 3.46 80.5 0.5990 16.47 3.46 80.5 0.5985 16.45 3.54 82.5 0.5922 16.27 3.61 84.5 0.5969 16.41 3.68 86.5 0.5968 16.41 3.76 88.5 0.5974 16.42 3.83 90.5 0.5994 16.48 3.9 92.5 0.6014 16.54 3.98 94.5 0.6011 16.53 4.05 96.5 0.6042 16.62 4.12 98.5 0.6292 17.36 4.2 100.5 0.6136 16.9 4.27 102.5 0.6306 17.4 4.35 104.5 0.6166 16.99 4.42 106.5 0.6218 17.14 4.49 108.5 0.6126 16.87 4.57 110.5 0.6073 16.72 4.64 112.5 0.6057 16.67 4.71 114.5 0.6174 17.01 4.79 116.5 0.6177 17.02 4.86 118.5 0.6213 17.13 4.93 120.5 0.6152 16.95 4.93 120.5 0.6111 16.83 5.01 122.5 0.6295 17.37 5.08 124.5 0.6343 17.51 5.15 126.5 0.6351 17.53 5.15 126.5 0.5997 16.49 5.23 128.5 0.6879 19.08 5.23 128.5 0.6189 17.06 5.3 130.5 0.6339 17.5 5.3 130.5 0.6207 17.11 5.38 132.5 0.6571 18.18 5.38 132.5 0.6179 17.03 5.45 134.5 0.6251 17.24 5.45 134.5 0.6110 16.82 5.52 136.5 0.6677 18.49 5.52 136.5 0.6460 17.85 5.6 138.5 0.6371 17.59 5.6 138.5 0.6289 17.35 5.67 140.5 0.6723 18.63 5.67 140.5 0.6393 17.66 5.74 142.5 0.6352 17.54 5.74 142.5 0.6395 17.66 5.82 144.5 0.6738 18.67 5.82 144.5 0.6402 17.68 5.89 146.5 0.6482 17.92 5.89 146.5 0.6381 17.62 5.96 148.5 0.6765 18.75 5.96 148.5 0.6434 17.78 6.04 150.5 0.6579 18.2 6.04 150.5 0.6424 17.75 6.11 152.5 0.6754 18.72 6.11 152.5 0.6439 17.79 6.18 154.5 0.6532 18.07 6.18 154.5 0.6491 17.94 6.26 156.5 0.6521 18.03 6.26 156.5 0.6425 17.75 6.33 158.5 0.6578 18.2 6.33 158.5 0.6426 17.75 6.4 160.5 0.6637 18.37 6.4 160.5 0.6478 17.91 6.4 160.5 0.6522 18.03 6.48 162.5 0.6622 18.33 6.48 162.5 0.6483 17.92 6.55 164.5 0.6521 18.03 6.55 164.5 0.6477 17.9 6.63 166.5 0.6622 18.33 6.63 166.5 0.6498 17.96 6.7 168.5 0.6671 18.47 6.7 168.5 0.6527 18.05 6.77 170.5 0.6601 18.27 6.77 170.5 0.6512 18.01 6.85 172.5 0.6493 17.95 6.92 174.5 0.6463 17.86 6.99 176.5 0.6441 17.8 7.07 178.5 0.6472 17.89 7.14 180.5 0.6520 18.03 7.21 182.5 0.6520 18.03 7.29 184.5 0.6470 17.88 7.36 186.5 0.6462 17.86 7.43 188.5 0.6470 17.88 7.51 190.5 0.6359 17.56 7.58 192.5 0.6364 17.57 7.66 194.5 0.6449 17.82 7.74 196.5 0.6505 17.99 7.83 198.5 0.6416 17.72 7.91 200.5 0.6403 17.68 7.91 200.5 0.6462 17.86 7.99 202.5 0.6511 18 8.07 204.5 0.6465 17.87 8.16 206.5 0.6464 17.86 8.24 208.5 0.6557 18.14 8.32 210.5 0.6189 17.06 8.4 212.5 0.6651 18.41 8.48 214.5 0.6622 18.33 8.57 216.5 0.6646 18.4 8.62 218.5 0.6686 18.52 8.68 220.5 0.6537 18.08 8.73 222.5 0.6604 18.28 8.78 224.5 0.6654 18.42 8.83 226.5 0.6555 18.13 8.88 228.5 0.6552 18.12 8.93 230.5 0.6505 17.98 8.93 230.5 0.6581 18.21 8.98 232.5 0.6562 18.15 9.03 234.5 0.6584 18.22 9.08 236.5 0.6516 18.02 9.13 238.5 0.6566 18.17 9.18 240.5 0.6396 17.66 9.23 242.5 0.6398 17.67 9.28 244.5 0.6356 17.55 9.33 246.5 0.6369 17.58 9.38 248.5 0.6495 17.96 9.41 249.5 0.6509 18 9.46 251.5 0.6425 17.75 9.51 253.5 0.6506 17.99 9.56 255.5 0.6494 17.95 9.61 257.5 0.6466 17.87 9.64 258.5 0.6482 17.92 9.69 260.5 0.6568 18.17 9.74 262.5 0.6527 18.05 9.79 264.5 0.6536 18.08 9.84 266.5 0.6559 18.14 9.89 268.5 0.6652 18.42 9.94 270.5 0.6620 18.32 9.99 272.5 0.6572 18.18 10.04 274.5 0.6510 18 10.09 276.5 0.6441 17.8 10.14 278.5 0.6566 18.16 10.19 280.5 0.6430 17.77 10.19 280.5 0.6471 17.89 10.25 282.5 0.6506 17.99 10.3 284.5 0.6643 18.39 10.35 286.5 0.6523 18.04 10.4 288.5 0.6368 17.58 10.45 290.5 0.6585 18.22 10.5 292.5 0.6700 18.56 10.55 294.5 0.6618 18.32 10.6 296.5 0.6639 18.38 10.65 298.5 0.6683 18.51 10.7 300.5 0.6675 18.48 10.75 302.5 0.6507 17.99 10.8 304.5 0.6392 17.65 10.83 306.5 0.6442 17.8 10.84 308.5 0.6312 17.42 10.86 310.5 0.6302 17.39 10.88 312.5 0.6347 17.52 10.9 314.5 0.6340 17.5 10.91 316.5 0.6348 17.52 10.93 318.5 0.6403 17.69 10.95 320.5 0.6598 18.26 10.95 320.5 0.6000 16.5 10.96 322.5 0.6690 18.53 10.98 324.5 0.6970 19.35 11 326.5 0.6800 18.85 11.01 328.5 0.6591 18.24 11.03 330.5 0.6525 18.04 11.05 332.5 0.6608 18.29 11.07 334.5 0.6578 18.2 11.08 336.5 0.6149 16.94 11.1 338.5 0.6301 17.38 11.12 340.5 0.6507 17.99 11.13 342.5 0.6658 18.43 11.15 344.5 0.6462 17.86 11.17 346.5 0.7134 19.84 11.18 348.5 0.7309 20.35 11.2 350.5 0.6999 19.44 11.22 352.5 0.6876 19.08 11.23 354.5 0.6705 18.57 11.25 356.5 0.6665 18.46 11.27 358.5 0.6776 18.78 11.29 360.5 0.7136 19.84 11.29 360.5 0.6625 18.34 11.3 362.5 0.6899 19.15 11.32 364.5 0.6944 19.28 11.34 366.5 0.7199 20.03 11.35 368.5 0.7063 19.63 11.4 370.5 0.7066 19.63 11.47 372.5 0.7308 20.35 11.59 376.5 0.7267 20.23 11.65 378.5 0.7099 19.73 11.71 380.5 0.7307 20.34 11.77 382.5 11.84 384.5 0.6736 18.66 11.87 385.5 0.7021 19.5 11.9 386.5 0.6565 18.16