Stein, Ruediger; Fahl, Kirsten (2012): Biomarker distributions in sediment core PS2767-4. PANGAEA, https://doi.org/10.1594/PANGAEA.803235, Supplement to: Stein, R; Fahl, K (2012): A first southern Lomonosov Ridge (Arctic Ocean) 60 ka IP25 sea-ice record. Polarforschung, 82(1), 83-86, hdl:10013/epic.40434.d001
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Abstract:
Here, we present a first (low-resolution) biomarker sea-ice proxy record from the High Arctic (southern Lomonosov Ridge), going back in time to about 60 ka (MIS 3 to MIS 1). Variable concentrations of the sea-ice diatom specific highly branched isoprenoid (HBI) with 25 carbon atoms ("IP25"), in combination with the phytoplankton biomarker brassicasterol, suggest variable seasonal sea-ice coverage and open-water productivity during MIS 3. During most of MIS 2, the spring to summer sea-ice margin significantly extended towards the south, resulting in a drastic decrease in phytoplankton productivity. During the Early Holocene Climate Optimum, brassicasterol reached its maximum, interpreted as signal for elevated phytoplankton productivity due to a significantly reduced sea-ice cover. During the mid-late Holocene, IP25 increased and brassicasterol decreased, indicating extended sea-ice cover and reduced phytoplankton productivity, respectively. The HBI diene/IP25 ratios probably reached maximum values during the Bølling-Allerød warm period and decreased during the Holocene, suggesting a correlation with sea-surface temperature.
Project(s):
Coverage:
Latitude: 79.743100 * Longitude: 144.006100
Date/Time Start: 1995-08-31T00:00:00 * Date/Time End: 1995-08-31T00:00:00
Minimum DEPTH, sediment/rock: 0.300 m * Maximum DEPTH, sediment/rock: 8.220 m
Event(s):
PS2767-4 (PS36/066) * Latitude: 79.743100 * Longitude: 144.006100 * Date/Time: 1995-08-31T00:00:00 * Elevation: -572.0 m * Recovery: 8.25 m * Location: Arctic Ocean * Campaign: ARK-XI/1 (PS36) * Basis: Polarstern * Method/Device: Kasten corer (KAL) * Comment: 9 core sections: 0.22-1.22, 1.22-2.22, 2.22-3.22, 3.22-4.22, 4.22-5.22, 5.22-6.22, 6.22-7.22, 7.22-8, 8-8.2 m
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
428 data points
Data
1 Depth sed [m] | 2 Age [ka BP] | 3 TOC [%] | 4 IP25/TOC [µg/g] | 5 C25 HBI diene/TOC [µg/g] | 6 C25 HBI diene/IP25 | 7 PBIP25 | 8 Brassicasterol/TOC [µg/g] | 9 Campesterol/TOC [µg/g] | 10 b-Sitosterol/TOC [µg/g] |
---|---|---|---|---|---|---|---|---|---|
0.300 | 1.820 | 0.60 | 0.656 | 0.375 | 0.572 | 0.931 | 1.896 | 5.074 | 7.995 |
0.400 | 2.430 | 0.50 | 0.000 | 0.000 | 0.000 | 0.000 | 1.777 | 2.227 | 7.779 |
0.500 | 3.040 | 0.62 | 0.468 | 0.526 | 1.126 | 0.707 | 7.615 | 7.441 | 16.425 |
0.600 | 3.640 | 0.64 | 0.394 | 0.566 | 1.434 | 0.666 | 7.767 | 7.366 | 24.874 |
0.700 | 4.250 | 0.61 | 0.731 | 1.125 | 1.539 | 0.694 | 12.633 | 7.257 | 21.533 |
0.800 | 4.860 | 0.64 | 0.171 | 0.295 | 1.719 | 0.630 | 3.940 | 4.350 | 22.374 |
0.900 | 5.470 | 0.64 | 0.430 | 0.559 | 1.299 | 0.681 | 7.892 | 8.696 | 19.042 |
1.000 | 6.070 | 0.67 | 0.261 | 0.574 | 2.201 | 0.462 | 11.891 | 18.294 | 53.651 |
1.100 | 6.680 | 0.68 | 0.667 | 1.572 | 2.358 | 0.627 | 15.534 | 18.439 | 45.052 |
1.200 | 7.290 | 0.82 | 0.260 | 0.639 | 2.455 | 0.388 | 16.099 | 15.747 | 56.919 |
1.300 | 7.900 | 0.77 | 0.334 | 0.717 | 2.145 | 0.284 | 32.996 | 25.663 | 52.414 |
1.400 | 8.500 | 0.80 | 0.210 | 0.681 | 3.237 | 0.287 | 20.556 | 32.716 | 85.131 |
1.500 | 9.110 | 0.78 | 0.294 | 0.952 | 3.241 | 0.363 | 20.189 | 19.915 | 56.598 |
1.600 | 9.720 | 0.74 | 0.157 | 0.385 | 2.455 | 0.320 | 13.075 | 16.546 | 50.225 |
1.700 | 9.990 | 0.70 | 0.320 | 0.768 | 2.402 | 0.397 | 19.022 | 18.354 | 53.033 |
1.800 | 10.120 | 0.82 | 0.153 | 0.326 | 2.129 | 0.342 | 11.527 | 17.968 | 52.417 |
1.900 | 10.260 | 0.76 | 0.291 | 0.868 | 2.978 | 0.396 | 17.407 | 18.930 | 52.066 |
2.000 | 10.390 | 0.59 | 0.085 | 0.346 | 4.085 | 0.284 | 8.388 | 13.981 | 43.229 |
2.100 | 10.750 | 0.43 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 65.297 | 9.887 |
2.200 | 11.150 | 0.39 | 0.023 | 0.033 | 1.459 | 0.182 | 3.984 | 14.533 | 9.809 |
2.350 | 11.730 | 0.43 | 0.534 | 2.982 | 5.580 | 0.716 | 8.332 | 9.269 | 25.030 |
2.450 | 12.130 | 0.28 | 0.000 | 0.244 | 0.000 | 2.820 | 1.871 | 7.525 | |
2.650 | 12.910 | 0.28 | 0.150 | 1.097 | 7.288 | 1.000 | 0.000 | 3.345 | 3.858 |
2.850 | 14.030 | 0.27 | 0.277 | 0.000 | 0.000 | 1.000 | 0.000 | 5.545 | 12.809 |
3.050 | 16.130 | 0.34 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 4.375 | 7.643 |
3.240 | 18.120 | 0.40 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 28.325 | 12.064 |
3.340 | 19.170 | 0.39 | 0.108 | 0.000 | 0.000 | 0.582 | 3.031 | 3.125 | 11.497 |
3.540 | 21.270 | 0.32 | 0.000 | 0.000 | 0.000 | 0.000 | 4.227 | 5.576 | 13.423 |
3.740 | 23.370 | 0.29 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 8.350 | 6.532 |
3.840 | 24.420 | 0.27 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 13.451 | 42.345 |
4.040 | 26.520 | 0.32 | 0.042 | 0.000 | 0.000 | 1.000 | 0.000 | 4.826 | 10.158 |
4.210 | 28.280 | 0.37 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 3.773 | 15.620 |
4.340 | 29.330 | 0.47 | 0.058 | 0.037 | 0.640 | 1.000 | 0.000 | 4.608 | 8.471 |
4.440 | 30.150 | 0.36 | 0.000 | 0.000 | 0.000 | 0.000 | 4.999 | 15.009 | 79.981 |
4.640 | 31.770 | 0.39 | 0.101 | 0.037 | 0.364 | 0.471 | 4.435 | 2.902 | 10.684 |
4.740 | 32.580 | 0.44 | 0.000 | 0.000 | 0.000 | 0.000 | 12.289 | 7.269 | 15.926 |
4.900 | 33.870 | 0.44 | 0.171 | 0.213 | 1.243 | 0.690 | 3.007 | 8.907 | 25.749 |
5.080 | 35.330 | 0.37 | 0.000 | 0.213 | 0.000 | 0.000 | 23.521 | 27.868 | |
5.230 | 36.550 | 0.42 | 0.000 | 0.287 | 0.000 | 8.365 | 15.078 | 18.233 | |
5.430 | 38.170 | 0.34 | 0.000 | 0.127 | 0.000 | 10.331 | 6.204 | 27.529 | |
5.630 | 39.790 | 0.38 | 0.000 | 0.062 | 0.000 | 0.000 | 0.000 | 3.775 | 11.766 |
5.820 | 41.330 | 0.39 | 0.096 | 0.441 | 4.584 | 0.442 | 4.766 | 6.943 | 26.431 |
5.900 | 41.980 | 0.31 | 0.250 | 1.007 | 4.028 | 0.619 | 6.035 | 4.099 | 14.916 |
6.120 | 43.760 | 0.29 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 63.955 |
6.230 | 44.650 | 0.31 | 0.116 | 0.000 | 0.000 | 0.626 | 2.719 | 10.746 | 5.855 |
6.430 | 46.270 | 0.44 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 14.101 |
6.630 | 47.900 | 0.44 | 0.236 | 0.104 | 0.438 | 1.000 | 0.000 | 3.140 | 10.325 |
6.720 | 48.630 | 0.29 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 4.340 | 13.108 |
7.020 | 51.060 | 0.29 | 0.000 | 0.000 | 0.000 | 0.000 | 8.010 | 15.277 | 4.608 |
7.210 | 52.600 | 0.31 | 0.644 | 1.513 | 2.350 | 1.000 | 0.000 | 0.000 | 8.724 |
7.300 | 53.330 | 0.26 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 8.987 |
7.540 | 55.270 | 0.37 | 0.063 | 0.000 | 0.000 | 1.000 | 0.000 | 5.060 | 2.596 |
7.740 | 56.890 | 0.58 | 0.327 | 0.572 | 1.747 | 1.000 | 0.000 | 0.000 | 39.243 |
8.220 | 60.620 | 0.74 | 0.243 | 0.504 | 2.072 | 0.370 | 16.251 | 15.845 | 39.578 |