Citation:

jqs.3060

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Abstract:

Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (d18O/d13C) from the north-eastern Greenland continental margin. The data show good comparability with other records from the Nordic Seas, allowing the stratigraphic range of PS1904 to be dated to Marine Isotope Stage (MIS) 6. Focusing on MIS 5 reveals light d18O values during MIS 5a compared to the last interglacial peak (MIS 5e) which indicates that surface and bottom water layers were strongly affected by freshwater during the former event. We present two possible scenarios explaining the origin and routing of the freshwater: (i) drainage of a Eurasian proglacial lake coupled with the collapse of the Kara Sea Ice Sheet at the MIS 5b/a boundary, and (ii) destabilization and melting of the nearby Greenland Ice Sheet. Although both scenarios could have acted simultaneously, sediment records from the Eurasian sector of the Arctic Ocean hint at the proglacial lake system in north-western Siberia as the largest freshwater source. Regardless of the actual source, the freshwater lowered the surface ocean salinity causing water column stratification and sea ice expansion. Increased sea-ice abundance led to a higher albedo and probably contributed to the cooling and global ice sheet growth that occurred subsequently during MIS 4.

Coverage:

Latitude: 77.087000 * Longitude: -3.990000

Date/Time Start: 1990-07-03T23:19:00 * Date/Time End: 1990-07-03T23:19:00

Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 2.285 m

Event(s):

PS1904-2 (GIK21904-2 PS17/079) * Latitude: 77.087000 * Longitude: -3.990000 * Date/Time: 1990-07-03T23:19:00 * Elevation: -1767.0 m * Penetration: 4.4 m * Recovery: 4.35 m * Location: Greenland Sea * Campaign: (PS17) * Basis: * Method/Device: Kasten corer (KAL)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Telesiński, Maciej Mateusz		Geocode
2	Neogloboquadrina pachyderma, δ18O	N. pachyderma δ18O	‰ PDB	Telesiński, Maciej Mateusz	Mass spectrometer, Finnigan, MAT 253	size fraction 125-500 µm
3	Neogloboquadrina pachyderma, δ13C	N. pachyderma δ13C	‰ PDB	Telesiński, Maciej Mateusz	Mass spectrometer, Finnigan, MAT 253	size fraction 125-500 µm
4	Oridorsalis umbonatus, δ18O	O. umbonatus δ18O	‰ PDB	Telesiński, Maciej Mateusz	Mass spectrometer, Finnigan, MAT 253	size fraction 125-500 µm
5	Oridorsalis umbonatus, δ13C	O. umbonatus δ13C	‰ PDB	Telesiński, Maciej Mateusz	Mass spectrometer, Finnigan, MAT 253	size fraction 125-500 µm
6	Ice rafted debris	IRD	#/g	Telesiński, Maciej Mateusz	Counting >250 µm fraction
7	Ice rafted debris	IRD	%	Telesiński, Maciej Mateusz	Counting >250 µm fraction	clastic
8	Foraminifera, planktic, subpolar	Foram plankt subpolar	%	Telesiński, Maciej Mateusz	Counting 125-250 µm fraction
9	Foraminifera, planktic	Foram plankt	#/g	Telesiński, Maciej Mateusz	Counting 125-250 µm fraction
10	Size fraction > 0.063 mm, sand	>63 µm	%	Telesiński, Maciej Mateusz

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

1143 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Depth sed [m]	2 N. pachyderma δ18O [‰ PDB]	3 N. pachyderma δ13C [‰ PDB]	4 O. umbonatus δ18O [‰ PDB]	5 O. umbonatus δ13C [‰ PDB]	6 IRD [#/g]	7 IRD [%]	8 Foram plankt subpolar [%]	9 Foram plankt [#/g]	10 >63 µm [%]
0.005	3.185	0.684	4.081	-1.067
0.035	3.580	0.684	5.047	-1.494			2.50	5904	50
0.045	3.943	0.542	5.124	-1.054			4.47	7580	60
0.055	3.786	0.679	5.223	-1.411			1.51	4087	48
0.065	3.526	0.802	5.258	-1.386			0.44	10582	48
0.075	4.165	0.325	5.174	-1.087			3.64	8245	48
0.085	3.487	0.636	5.351	-1.354			1.92	11821	45
0.095	3.642	0.581	5.236	-1.288			1.38	6951	49
0.105	3.623	0.705	5.322	-1.445			3.86	8642	51
0.115	3.626	0.523	5.263	-1.480			4.21	7893	48
0.125	4.201	0.511	5.766	-1.534			2.49	8534	47
0.135	4.004	0.549	5.458	-1.667			1.80	7667	37
0.145	4.367	0.310	5.416	-1.749			0.71	5767	27
0.155	4.666	0.090	5.455	-1.658			1.06	6163	25
0.165	4.552	0.269	5.445	-1.775			0.38	5835	24
0.175	4.402	0.229	5.550	-1.716			1.28	6385	21
0.185	4.419	0.331	5.552	-1.747			3.61	3917	20
0.195	4.340	0.288	5.339	-1.491			2.42	4423	28
0.205	4.493	0.309					2.30	3209	21
0.215	4.578	0.349	5.080	-1.679			3.12	3366	22
0.225	4.377	0.274	5.493	-1.787			2.09	2987	25
0.235	4.027	0.085	5.281	-1.828			1.85	7195	27
0.245	4.150	0.249	5.541	-1.517			1.87	3370	25
0.255	4.368	0.149	5.460	-1.876			1.48	2746	24
0.265	4.347	0.162	5.280	-1.887			2.17	1947	20
0.275	4.274	0.210	5.429	-1.724			4.71	5804	38
0.285	4.567	0.308	5.054	-1.270			1.79	7646	43
0.295	4.360	0.313	5.205	-1.423			1.25	9051	51
0.305	4.241	0.202	5.164	-1.566			1.02	8975	45
0.315	4.441	0.283	5.143	-1.117			2.02	8800	47
0.325	4.051	0.270	5.082	-1.100			1.83	7088	46
0.335	4.329	0.267					1.61	9278	51
0.345	4.133	0.215	5.136	-1.399			0.69	11043	45
0.355	3.931	0.401	5.163	-1.220			1.67	11148	48
0.365	4.241	0.355	5.117	-1.273			1.91	9720	50
0.375	3.952	0.304	4.791	-1.594			2.98	11729	57
0.385	4.116	0.372	5.210	-1.438			1.33	11443	61
0.395	4.237	0.354	5.151	-1.165			1.43	14555	57
0.405	3.794	0.263					1.38	14765	60
0.415	3.703	0.377	5.048	-1.113			2.10	11140	53
0.425	4.375	0.187	5.059	-1.208			1.56	11539	51
0.435	4.105	0.472	5.276	-0.959	6719	14.80	2.80	4489	52
0.445	4.284	0.451	5.240	-1.017			1.87	4940	53
0.455	4.275	0.463	5.060	-1.432					54
0.465	4.053	0.424	5.235	-1.102	1895	22.41	2.97	13201	53
0.475	4.089	0.461	5.184	-1.201					55
0.485	4.257	0.516	4.920	-1.335					54
0.495	4.024	0.510	5.099	-1.504					49
0.505	3.871	0.460	5.169	-1.196					55
0.515	4.033	0.432	5.161	-1.034					56
0.525	3.888	0.485	5.057	-1.688					58
0.535	3.867	0.511	5.125	-1.138					59
0.545	4.166	0.652	4.822	-1.285	1766	16.62	3.27	13153	66
0.555	4.123	0.451	4.998	-1.197					64
0.565	3.890	0.404	4.922	-1.227					59
0.575	4.273	0.461	4.929	-0.980			1.25	4248	64
0.585	4.310	0.299	5.018	-1.094			3.02	8334	52
0.595	4.123	0.022	5.433	-1.811			0.00		58
0.605	4.545	0.110	5.285	-1.982			1.26	9264	57
0.615	4.394	0.071	5.415	-1.871			1.50	11820	50
0.625	4.259	-0.047	5.267	-1.865	1829	12.97	1.25	10013	52
0.635	4.123	-0.008	5.298	-1.732			1.66	16954	52
0.645	4.363	0.121	5.201	-1.753			1.47	15930	59
0.655	4.336	0.047	5.349	-1.853			0.00	17570	55
0.665	4.321	0.034	5.178	-1.702	11801	14.29	3.04	10814	53
0.675	4.414	0.131	5.017	-1.365			1.46	28131	49
0.685	4.224	0.022	5.091	-1.428			1.52	24415	58
0.695	4.332	0.174	4.973	-1.341			2.07	15211	61
0.705	4.340	0.313	4.991	-1.694	1594	10.79	2.34	13075	48
0.715	4.282	0.325	5.077	-1.407			2.23	20304	38
0.725	4.364	0.161	4.929	-1.350	1279	17.72	4.93	15759	36
0.735	4.252	0.389	5.006	-1.347	1217	12.72	2.57	13130	42
0.745	4.225	0.592	4.928	-1.224	3251	7.45	4.26	15840	29
0.755	4.173	0.617	4.688	-1.187	269	25.00	4.64	15045	31
0.765	4.210	0.538	5.101	-1.083	797	11.99	8.21	13463	25
0.775	3.967	0.493	4.762	-1.020	572	24.55	4.30	28077	53
0.785	3.903	0.670	4.586	-0.889	135	25.97	6.05	7897	21
0.795	3.977	0.731	4.608	-1.041			4.60	5289	14
0.805	3.914	0.617	4.618	-1.034	128	22.76	5.51	3563	13
0.815	3.833	0.643	4.725	-1.045			3.36	3547	12
0.825	3.966	0.619	4.689	-0.886	129	17.65	3.37	4815	13
0.835	3.941	0.663	4.755	-0.919			6.90	5357	14
0.845	3.789	0.606	4.686	-1.038	107	17.79	5.68	7162	16
0.855	3.839	0.697	4.628	-1.151			6.87	5601	14
0.865	4.054	0.615	4.676	-1.224	126	23.64	3.00	4893	12
0.875	3.947	0.593	4.785	-1.016			3.47	4541	10
0.885	4.032	0.542	4.718	-1.263	191	25.16	1.63	4898	12
0.895	3.784	0.421	4.690	-1.262			3.82	8161	13
0.905	4.012	0.525	4.716	-1.197	230	25.34	3.99	4730	12
0.915	3.946	0.494	4.688	-1.272			3.14	4533	12
0.925	3.797	0.447	4.706	-1.304	375	21.21	3.56	5849	13
0.935	3.843	0.562	4.647	-1.160	568	18.70	3.44	5739	16
0.945	4.118	0.448	4.770	-1.071	941	35.71	4.98	7282	28
0.955	4.238	0.351	4.741	-1.509	1623	23.44	4.59	7340	43
0.965	4.122	0.419	4.885	-1.351	5235	10.30	1.95	9235	43
0.975	4.535	0.442					1.69	9107	45
0.985	4.127	0.418	4.699	-1.344	3400	6.46	6.47	9602	49
0.995	4.512	0.519	5.044	-1.349			13.64	10964	47
1.005	4.217	0.526	4.992	-1.426	2674	5.39	17.14	10182	50
1.015	4.407	0.443	4.897	-1.358	2364	10.09	19.28	14402	48
1.025	4.388	0.452	4.970	-1.284	5919	4.73	25.84	7089	46
1.035	4.382	0.574	5.068	-1.241	11696	1.08	12.79	2404	42
1.045	4.186	0.485	5.044	-1.195	10806	2.34	9.89	789	40
1.055	4.228	0.507	5.101	-1.269	5902	2.95	11.21	758	40
1.065	4.103	0.440	4.884	-1.535	11561	0.92	14.89	551	40
1.075	4.119	0.493	5.166	-1.213	11374	0.74	17.57	643	40
1.085	4.209	0.344	5.280	-1.276	15396	1.92	5.86	106	39
1.095	4.366	0.390	4.988	-1.350	4352	3.04	4.07	79	40
1.105	4.363	0.367	5.195	-1.414	2028	2.61	3.33	149	40
1.115	4.234	0.336	5.039	-1.480	1172	6.19	4.18	59	26
1.125	4.228	0.399	4.844	-1.445	15724	1.16	4.95	52	38
1.135	4.201	0.221	4.887	-1.362	2423	1.68	4.16	87	40
1.145	4.181	0.347	4.981	-1.315	3631	2.90	3.32	107	38
1.155	3.957	0.132	5.255	-1.264	3263	1.71	3.13	14	42
1.165	4.236	0.350	5.140	-1.275	1952	1.57	3.45	115	40
1.175	4.195	0.299	4.270	-1.594	3959	0.33	4.61	31	40
1.185	4.142	0.243			3176	1.47	3.40	36	40
1.195	4.050	0.100	4.500	-1.468	3121	2.94	4.35	26	38
1.205	4.104	0.375	5.166	-1.164	12320	0.71	6.02	34	39
1.215	4.213	0.348	4.901	-1.352					38
1.225	4.410	0.248			1540	4.04	4.87	72	39
1.235	4.336	0.308							40
1.245	4.241	0.312	4.929	-1.057	4827	4.00	4.17	60	42
1.255	4.302	0.349	5.345	-0.757					37
1.265	4.203	0.279	3.693	-1.381					38
1.275	4.204	0.315	5.119	-1.254					39
1.285	4.378	0.181	5.136	-1.303	3024	5.88	3.46	76	39
1.295	4.101	0.201	4.556	-1.851					38
1.305	4.226	0.265	4.523	-1.709					39
1.315	4.120	0.254	5.510	-0.899					40
1.325							4.71	20	37
1.335	3.901	0.073							38
1.345	3.683	0.004							39
1.355	4.157	0.360							39
1.365	4.065	0.194	4.681	-1.807	2887	2.16	3.31	15	39
1.375	3.666	0.435							38
1.385	3.283	0.123							39
1.395	3.946	0.277							38
1.405	3.900	0.141					5.17	17	40
1.415	4.344	0.271							47
1.425	3.795	0.348					4.03	22	44
1.435	3.848	0.478	4.637	-1.413			9.43	208	38
1.445	3.756	0.543	4.589	-1.385	3246	5.00	16.94	586	38
1.455	3.662	0.292					7.77	247	39
1.465	4.085	0.033	5.001	-1.574			5.23	52	38
1.475	4.109	0.563							38
1.485	3.799	0.351					3.77	12	38
1.495	3.937	0.285							34
1.505	4.173	0.237	4.708	-1.427					38
1.515	4.029	0.100	4.952	-1.529					39
1.525	4.256	0.239	4.954	-1.477	2569	6.92	5.01	211	38
1.535	4.226	0.402							39
1.545	4.240	0.294							33
1.555	3.920	0.186							42
1.565	4.000	0.098							40
1.575	3.966	0.216							39
1.585									38
1.595	4.396	0.152							38
1.605									39
1.615									38
1.625									53
1.635									38
1.645									38
1.655									37
1.665									49
1.675									40
1.685									41
1.695									43
1.705									38
1.715									37
1.725									37
1.735									40
1.745									43
1.755									40
1.765									38
1.775									39
1.785									39
1.795									38
1.805									38
1.815									39
1.825									39
1.835									39
1.845									38
1.855									41
1.865									76
1.875									40
1.885									40
1.895									39
1.905									39
1.915									36
1.925									38
1.935									38
1.945									39
1.955									39
1.965									39
1.975									38
1.985									39
1.995									40
2.005									37
2.015									38
2.025									38
2.035									37
2.045									39
2.055									42
2.065									40
2.075									38
2.085									37
2.095									39
2.105									41
2.115									40
2.125									39
2.135									43
2.145									46
2.155									42
2.165									42
2.175									42
2.185									36
2.195									41
2.205									40
2.215									41
2.225									39
2.235									49
2.245									39
2.255									38
2.265									39
2.275									40
2.285									40