Wary, Mélanie; Eynaud, Frédérique; Rossignol, Linda; Lapuyade, Joanna; Gasparotto, Marie-Camille; Londeix, Laurent; Malaizé, Bruno; Castera, Marie-Hélène; Charlier, Karine (2016): Dinocyst-derived sea-surface characteristics, palynomorph abundances, ice-rafted debris, and planktonic foraminifera abundances and δ¹⁸O of the 35-41 ka BP interval of core MD99-2285 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.864808, Supplement to: Wary, M et al. (2016): Norwegian Sea warm pulses during Dansgaard-Oeschger stadials: Zooming in on these anomalies over the 35–41 ka cal BP interval and their impacts on proximal European ice-sheet dynamics. Quaternary Science Reviews, 151, 255-272, https://doi.org/10.1016/j.quascirev.2016.09.011
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Abstract:
The last glacial millennial climatic events (i.e. Dansgaard-Oeschger and Heinrich events) constitute outstanding case studies of coupled atmosphere-ocean-cryosphere interactions. Here, we investigate the evolution of sea-surface and subsurface conditions, in terms of temperature, salinity and sea ice cover, at very high-resolution (mean resolution between 55 and 155 years depending on proxies) during the 35-41 ka cal BP interval covering three Dansgaard-Oeschger cycles and including Heinrich event 4, in a new unpublished marine record, i.e. the MD99-2285 core (62.69°N; -3.57°E). We use a large panel of complementary tools, which notably includes dinocyst-derived sea-ice cover duration quantifications. The high temporal resolution and multiproxy approach of this work allows us to identify the sequence of processes and to assess ocean-cryosphere interactions occurring during these periodic ice-sheet collapse events. Our results evidence a paradoxical hydrological scheme where (i) Greenland interstadials are marked by a homogeneous and cold upper water column, with intensive winter sea ice formation and summer sea ice melting, and (ii) Greenland and Heinrich stadials are characterized by a very warm and low saline surface layer with iceberg calving and reduced sea ice formation, separated by a strong halocline from a less warm and saltier subsurface layer. Our work also suggests that this stadial surface/subsurface warming started before massive iceberg release, in relation with warm Atlantic water advection. These findings thus support the theory that upper ocean warming might have triggered European ice-sheet destabilization. Besides, previous paleoceanographic studies conducted along the Atlantic inflow pathways close to the edge of European ice-sheets suggest that such a feature might have occurred in this whole area. Nonetheless, additional high resolution paleoreconstructions are required to confirm such a regional scheme.
Coverage:
Latitude: 62.693833 * Longitude: -3.572333
Date/Time Start: 1999-08-01T00:00:00 * Date/Time End: 1999-08-01T00:00:00
Minimum DEPTH, sediment/rock: 4.445 m * Maximum DEPTH, sediment/rock: 5.990 m
Event(s):
MD99-2285 (2065N) * Latitude: 62.693833 * Longitude: -3.572333 * Date/Time: 1999-08-01T00:00:00 * Elevation: -885.0 m * Recovery: 46.92 m * Location: N.Faeroes * Campaign: MD114 (IMAGES V) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO) * Comment: N.Faeroes (MD 95 2009)
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
647 data points
Data
1 Depth sed [m] | 2 Age [ka BP] | 3 Dinofl cyst rew [#/cm3] | 4 Pediastrum spp. coenobia [#/cm3] | 5 Halodinium spp. [#/cm3] | 6 B. tepikiense [%] | 7 O. centrocarpum [%] | 8 I. minutum var. minutum [%] | 9 H(S) | 10 Dominance | 11 SST win [°C] | 12 SST sum [°C] | 13 SIC d [months/a] | 14 SSS win | 15 SSS sum | 16 PP C [mg/m2] | 17 N. pachyderma s δ18O [‰ PDB] | 18 N. pachyderma s [%] | 19 Foram plankt [#/g] | 20 IRD [#/g] |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4.445 | 35.6794 | 1071.972 | 36.965 | 160.180 | 13.441 | 18.280 | 51.613 | 1.495 | 0.699 | 0.013 | 13.952 | 1.892 | 31.087 | 29.897 | 275270.676 | 3.69 | 97.750 | 332.005 | 907 |
4.495 | 36.0356 | 441.228 | 0.000 | 4.596 | 20.192 | 26.923 | 18.269 | 1.975 | 0.471 | 3.744 | 16.868 | 0.260 | 32.574 | 31.963 | 292498.525 | 3.74 | 95.531 | 826.523 | 1921 |
4.545 | 36.3919 | 603.540 | 86.220 | 879.444 | 2.933 | 2.639 | 92.375 | 0.384 | 0.953 | -0.990 | 1.729 | 7.522 | 33.304 | 32.292 | 121079.376 | 3.70 | 97.361 | 161.057 | 1479 |
4.595 | 36.6950 | 1392.247 | 356.986 | 1963.425 | 0.926 | 1.852 | 91.358 | 0.456 | 0.941 | -1.019 | 1.673 | 8.228 | 32.758 | 30.778 | 108160.317 | 4.17 | 97.772 | 73.182 | 730 |
4.645 | 36.9450 | 338.044 | 81.597 | 1247.266 | 2.318 | 3.974 | 90.728 | 0.443 | 0.947 | -0.871 | 2.975 | 7.440 | 33.428 | 30.526 | 124721.073 | 4.18 | 99.143 | 56.994 | 920 |
4.675 | 37.0950 | 98.017 | 74.242 | 324 | |||||||||||||||
4.695 | 37.1950 | 312.720 | 238.263 | 342.503 | 5.247 | 8.025 | 81.481 | 0.794 | 0.895 | 0.194 | 5.099 | 4.166 | 33.711 | 32.704 | 170764.435 | 4.16 | 97.814 | 80.716 | 217 |
4.745 | 37.4450 | 149.851 | 24.975 | 374.627 | 3.313 | 8.434 | 83.434 | 0.669 | 0.919 | -1.219 | 1.644 | 8.024 | 33.312 | 30.315 | 101128.422 | 4.19 | 97.389 | 60.088 | 401 |
4.755 | 37.4950 | 97.361 | 113.273 | 239 | |||||||||||||||
4.795 | 37.6950 | 133.641 | 0.000 | 326.678 | 10.119 | 8.036 | 75.595 | 0.938 | 0.857 | -0.174 | 9.228 | 4.183 | 32.194 | 30.675 | 236348.171 | 4.19 | 97.176 | 96.479 | 374 |
4.845 | 37.9450 | 4.23 | 97.820 | 94.753 | 283 | ||||||||||||||
4.895 | 38.1878 | 247.167 | 21.493 | 75.225 | 12.195 | 8.841 | 60.671 | 1.438 | 0.729 | 1.322 | 15.777 | 0.494 | 31.517 | 30.575 | 307927.330 | 4.04 | 97.458 | 74.858 | 78 |
4.995 | 38.5443 | 164.481 | 9.138 | 63.965 | 18.750 | 14.375 | 40.625 | 1.797 | 0.594 | 1.425 | 15.736 | 0.783 | 31.757 | 30.784 | 297243.514 | 3.86 | 96.505 | 199.996 | 243 |
5.075 | 38.8296 | 965.185 | 0.000 | 17.549 | 16.168 | 16.168 | 31.138 | 1.922 | 0.497 | 2.101 | 13.941 | 1.401 | 32.715 | 31.694 | 264867.686 | 3.51 | 99.167 | 250.250 | 377 |
5.085 | 38.8652 | 97.911 | 274.836 | 402 | |||||||||||||||
5.095 | 38.9009 | 251.429 | 0.000 | 20.609 | 16.300 | 19.383 | 18.502 | 1.863 | 0.502 | 3.815 | 15.949 | 0.213 | 32.833 | 32.357 | 286300.020 | 3.69 | 97.734 | 232.819 | 483 |
5.115 | 38.9722 | 1020.221 | 5.545 | 27.723 | 17.376 | 14.894 | 28.369 | 1.751 | 0.564 | 1.090 | 12.580 | 3.031 | 32.273 | 31.255 | 250258.418 | 3.54 | 97.722 | 353.740 | 940 |
5.135 | 39.0435 | 3.75 | 95.761 | 335.514 | 746 | ||||||||||||||
5.155 | 39.1148 | 1023.545 | 0.000 | 10.774 | 35.762 | 18.543 | 14.570 | 1.801 | 0.543 | 1.895 | 13.511 | 1.407 | 32.840 | 32.149 | 256730.130 | 3.50 | 98.305 | 468.502 | 2181 |
5.175 | 39.1861 | 571.012 | 4.050 | 16.199 | 36.269 | 20.207 | 7.254 | 1.835 | 0.565 | 3.165 | 16.585 | 0.665 | 32.364 | 31.552 | 288884.386 | 3.82 | 98.133 | 551.183 | 1930 |
5.195 | 39.2574 | 424.618 | 0.000 | 0.000 | 55.738 | 21.311 | 1.639 | 1.440 | 0.770 | 3.932 | 15.096 | 0.567 | 33.310 | 32.401 | 287593.101 | 3.90 | 97.487 | 511.305 | 2081 |
5.215 | 39.3287 | 695.820 | 0.000 | 8.864 | 52.410 | 18.675 | 1.205 | 1.609 | 0.711 | 3.704 | 16.924 | 0.260 | 32.585 | 31.925 | 291183.449 | 4.00 | 98.291 | 729.502 | 2239 |
5.235 | 39.4000 | 1057.827 | 35.261 | 26.446 | 22.222 | 24.691 | 20.988 | 1.611 | 0.506 | -1.061 | 5.239 | 6.311 | 33.778 | 31.855 | 156678.620 | 4.05 | 98.942 | 203.239 | 804 |
5.255 | 39.4713 | 1160.556 | 115.530 | 52.514 | 14.865 | 14.865 | 47.973 | 1.564 | 0.628 | -1.059 | 5.943 | 5.778 | 33.727 | 31.889 | 156608.581 | 4.04 | 98.652 | 160.140 | 619 |
5.275 | 39.5426 | 913.885 | 152.314 | 165.007 | 3.030 | 6.397 | 83.502 | 0.707 | 0.899 | -0.599 | 6.719 | 5.628 | 32.636 | 31.351 | 193818.512 | 4.16 | 98.387 | 155.153 | 984 |
5.295 | 39.6139 | 859.495 | 188.670 | 167.706 | 4.667 | 5.667 | 74.333 | 1.083 | 0.807 | -0.232 | 7.875 | 4.489 | 33.251 | 32.152 | 188127.134 | 4.10 | 97.011 | 44.845 | 691 |
5.315 | 39.6852 | 694.933 | 561.861 | 576.647 | 2.454 | 3.374 | 91.718 | 0.410 | 0.951 | -1.070 | 1.964 | 7.709 | 33.885 | 32.074 | 128723.824 | 4.42 | 97.613 | 96.807 | 521 |
5.335 | 39.7565 | 1057.958 | 1089.075 | 451.188 | 1.558 | 3.115 | 93.769 | 0.319 | 0.969 | -0.983 | 1.711 | 7.598 | 33.326 | 32.291 | 121423.168 | 4.32 | 98.992 | 90.847 | 549 |
5.355 | 39.8188 | 1220.244 | 830.804 | 778.879 | 1.685 | 3.652 | 91.573 | 0.425 | 0.952 | -0.906 | 1.310 | 8.078 | 33.856 | 32.055 | 122981.232 | 4.24 | 99.446 | 111.614 | 622 |
5.375 | 39.8541 | 1267.488 | 1201.929 | 939.690 | 2.609 | 2.609 | 91.014 | 0.457 | 0.936 | -0.790 | 4.022 | 6.960 | 32.468 | 30.578 | 142482.128 | 4.26 | 98.113 | 116.855 | 838 |
5.395 | 39.8894 | 1101.127 | 440.451 | 513.859 | 1.661 | 5.316 | 89.037 | 0.513 | 0.944 | -1.071 | 1.194 | 8.807 | 33.494 | 30.529 | 109312.225 | 4.24 | 96.834 | 153.536 | 657 |
5.415 | 39.9247 | 1216.369 | 735.479 | 1131.506 | 1.902 | 2.717 | 91.304 | 0.428 | 0.940 | -1.018 | 2.155 | 8.152 | 32.830 | 29.873 | 123044.536 | 4.44 | 97.686 | 115.091 | 704 |
5.435 | 39.9600 | 1374.593 | 320.738 | 1191.314 | 2.857 | 5.974 | 88.831 | 0.475 | 0.948 | -0.872 | 3.034 | 7.433 | 33.441 | 30.488 | 125075.253 | 4.55 | 98.607 | 94.514 | 391 |
5.455 | 39.9953 | 453.217 | 21.582 | 280.563 | 3.571 | 5.357 | 88.393 | 0.513 | 0.938 | -0.860 | 1.917 | 7.544 | 33.077 | 31.218 | 111699.946 | 4.46 | 98.656 | 116.607 | 603 |
5.495 | 40.0659 | 388.188 | 91.338 | 365.354 | 6.689 | 6.020 | 81.940 | 0.753 | 0.886 | -0.860 | 3.801 | 7.293 | 33.041 | 30.644 | 141375.564 | 4.06 | 98.898 | 117.236 | 248 |
5.595 | 40.2284 | 428.250 | 50.055 | 66.740 | 32.903 | 20.968 | 25.161 | 1.720 | 0.581 | 0.537 | 14.765 | 2.003 | 31.781 | 30.419 | 287074.271 | 4.00 | 97.450 | 431.382 | 1365 |
5.695 | 40.3863 | 276.590 | 103.721 | 380.312 | 15.179 | 16.667 | 60.714 | 1.198 | 0.774 | -0.587 | 6.791 | 5.597 | 32.668 | 31.380 | 194996.575 | 3.86 | 97.802 | 188.993 | 193 |
5.795 | 40.5442 | 454.799 | 13.644 | 127.344 | 20.561 | 21.495 | 40.810 | 1.687 | 0.623 | 2.031 | 16.062 | 0.409 | 31.874 | 31.049 | 302399.266 | 3.96 | 94.321 | 775.149 | 813 |
5.895 | 40.7021 | 660.187 | 312.720 | 347.467 | 4.319 | 4.319 | 87.375 | 0.583 | 0.917 | -0.455 | 3.780 | 6.636 | 33.422 | 32.016 | 157928.677 | 4.32 | 97.778 | 50.249 | 688 |
5.990 | 40.9132 | 658.659 | 343.648 | 1059.582 | 12.459 | 6.885 | 75.082 | 0.931 | 0.875 | 0.723 | 10.817 | 1.620 | 32.601 | 31.366 | 252393.394 | 4.19 | 98.760 | 31.266 | 457 |