Citation:

j.epsl.2017.05.006

Name: Biomarker records in sediment core MD99-2272 from North of Iceland Shelf
Published: 2017
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

We present a sea-ice record back to 15 ka (cal. ka BP) based on the sea-ice biomarker IP25, phytoplankton biomarker brassicasterol and terrestrial biomarker long-chain n-alkanols in piston core MD99-2272 from the North Icelandic shelf. During the Bølling/Allerød (14.7-12.9 ka), the North Icelandic shelf was characterized by extensive spring sea-ice cover linked to reduced flow of warm Atlantic Water and dominant Polar water influence, as well as strong meltwater input in the area. This pattern showed an anti-phase relationship with the ice-free/less ice conditions in marginal areas of the eastern Nordic Seas, where the Atlantic Water inflow was strong, and contributed to an enhanced deep-water formation. Prolonged sea-ice cover with occasional occurrence of seasonal sea ice prevailed during the Younger Dryas (12.9-11.7 ka) interrupted by a brief interval of enhanced Irminger Current and deposition of the Vedde Ash, as opposed to abruptly increased sea-ice conditions in the eastern Nordic Seas. The seasonal sea ice decreased gradually from the Younger Dryas to the onset of the Holocene corresponding to increasing insolation. Ice-free conditions and sea surface warming were observed for the Early Holocene, followed by expansion of sea ice during the Mid-Holocene.

Coverage:

Latitude: 66.992833 * Longitude: -17.974833

Date/Time Start: 1999-08-01T00:00:00 * Date/Time End: 1999-08-01T00:00:00

Minimum DEPTH, sediment/rock: 3.405 m * Maximum DEPTH, sediment/rock: 17.805 m

Event(s):

MD99-2272 (5<56>Fr) * Latitude: 66.992833 * Longitude: -17.974833 * Date/Time: 1999-08-01T00:00:00 * Elevation: -440.0 m * Recovery: 22.6 m * Location: North Icelandic Shelf * Campaign: (IMAGES V) * Basis: * Method/Device: Calypso Corer (CALYPSO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	DEPTH, sediment/rock	Depth sed	m	Eiriksson, Jón	Geocode
2	AGE	Age	ka BP	Eiriksson, Jón	Geocode
3	2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass	IP25/sed	ng/g	Xiao, Xiaotong
4	24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass	Brassicasterol/sed	µg/g	Xiao, Xiaotong
5	n-Alkanol long chain alcohols C26+C28+C30 per unit sediment mass	C26+C28+C30 n-A.ol/sed	µg/g	Xiao, Xiaotong
6	Phytoplankton biomarker Brassicasterol IP25 index	PBIP25		Xiao, Xiaotong

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

912 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 IP25/sed [ng/g]	4 Brassicasterol/sed [µg/g]	5 C26+C28+C30 n-A.ol/sed [µg/g]	6 PBIP25
3.405	4.020	0.00	0.49537	0.83947	0.00
3.505	4.140	0.25	0.45964	0.98211	0.11
3.605	4.293	0.40	0.42357	1.10703	0.19
3.705	4.478	0.27	0.49812	0.99838	0.11
3.805	4.664	0.28	0.47480	0.92596	0.12
3.905	4.849	0.35	0.47868	1.01924	0.15
4.005	5.035	0.24	0.54495	0.84448	0.10
4.105	5.221	0.20	0.35015	0.75535	0.12
4.205	5.406	0.36	0.35500	0.70292	0.19
4.305	5.592	0.00	0.39671	0.78099	0.00
4.405	5.777	0.23	0.56256	0.74859	0.09
4.505	5.963	0.00	0.43998	0.70648	0.00
4.605	6.149	0.00	0.60229	0.83622	0.00
4.705	6.334	0.00	0.57068	0.68525	0.00
4.805	6.520	0.25	0.48065	0.64472	0.11
4.905	6.680	0.18	0.62318	0.70532	0.06
5.005	6.780	0.00	0.38469	0.61507	0.00
5.105	6.880	0.00	0.42832	0.64955	0.00
5.205	6.980	0.00	0.52384	0.65717	0.00
5.305	7.088	0.00	0.47773	0.57099	0.00
5.405	7.218	0.00	0.44006	0.64772	0.00
5.505	7.349	0.00	0.47574	0.84968	0.00
5.605	7.479	0.00	0.41075	0.62562	0.00
5.705	7.610	0.00	0.34073	0.50393	0.00
5.805	7.740	0.00	0.42645	0.61731	0.00
5.905	7.871	0.00	0.44635	0.73218	0.00
6.005	8.001	0.00	0.41616	0.68373	0.00
6.105	8.132	0.00	0.36601	0.58759	0.00
6.205	8.262	0.00	0.37916	0.53101	0.00
6.305	8.393	0.00	0.33133	0.62240	0.00
6.405	8.523	0.00	0.42385	0.53149	0.00
6.505	8.654	0.00	0.43445	0.53895	0.00
6.605	8.784	0.00	0.47361	0.60473	0.00
6.705	8.915	0.00	0.38321	0.50290	0.00
6.805	9.045	0.00	0.41210	0.53568	0.00
6.905	9.176	0.00	0.39870	0.59684	0.00
7.005	9.306	0.00	0.45413	0.58502	0.00
7.105	9.437	0.00	0.34345	0.51485	0.00
7.205	9.567	0.00	0.37091	0.55447	0.00
7.305	9.698	0.00	0.36697	0.61582	0.00
7.405	9.828	0.00	0.43087	0.72349	0.00
7.505	9.959	0.00	0.28290	0.56780	0.00
7.605	10.089	0.00	0.25915	0.47700	0.00
7.705	10.220	0.00	0.18540	0.26009	0.00
7.855	10.337	0.00	0.40871	0.62354	0.00
8.005	10.398	0.00	0.34416	0.63510	0.00
8.155	10.460	0.00	0.42579	0.59059	0.00
8.305	10.521	0.00	0.44507	0.55636	0.00
8.455	10.582	0.00	0.25487	0.56541	0.00
8.605	10.644	0.00	0.33382	0.51599	0.00
8.755	10.705	0.00	0.28100	0.48327	0.00
8.905	10.766	0.00	0.24554	0.44122	0.00
9.055	10.828	0.00	0.36214	0.52807	0.00
9.105	10.848	0.00	0.29430	0.39642	0.00
9.155	10.869	0.00	0.38395	0.49436	0.00
9.205	10.889	0.00	0.35390	0.46765	0.00
9.255	10.909	0.00	0.32884	0.42501	0.00
9.305	10.930	0.00	0.36431	0.42196	0.00
9.355	10.950	0.00	0.26613	0.41011	0.00
9.405	10.971	0.00	0.35935	0.48773	0.00
9.455	10.991	0.00	0.31114	0.36471	0.00
9.505	11.012	0.00	0.30997	0.38679	0.00
9.555	11.032	0.00	0.27682	0.46775	0.00
9.605	11.053	0.00	0.40785	0.51804	0.00
9.655	11.073	0.00	0.40685	0.55300	0.00
9.705	11.094	0.00	0.45480	0.57125	0.00
9.755	11.114	0.00	0.30866	0.47312	0.00
9.805	11.134	0.00	0.29076	0.52546	0.00
9.855	11.155	0.00	0.20995	0.50034	0.00
9.905	11.175	0.00	0.27844	0.40920	0.00
9.955	11.196	0.00	0.23329	0.46817	0.00
10.005	11.216	0.00	0.27769	0.44976	0.00
10.055	11.237	0.00	0.25081	0.39739	0.00
10.105	11.257	0.00	0.22202	0.39825	0.00
10.155	11.278	0.00	0.24634	0.43512	0.00
10.205	11.298	0.22	0.33169	0.43719	0.14
10.255	11.318	0.00	0.34318	0.46278	0.00
10.305	11.339	0.90	0.37517	0.44148	0.36
10.355	11.359	0.00	0.35725	0.42104	0.00
10.405	11.380	0.47	0.27643	0.46703	0.29
10.455	11.400	0.20	0.36811	0.46386	0.11
10.505	11.421	0.56	0.44331	0.58704	0.23
10.555	11.441	0.57	0.35424	0.51042	0.28
10.605	11.462	0.55	0.34762	0.55879	0.27
10.655	11.482	0.61	0.40265	0.48424	0.27
10.705	11.503	0.60	0.33530	0.56906	0.30
10.755	11.523	0.45	0.49302	0.66509	0.18
10.805	11.543	0.52	0.33581	0.57099	0.27
10.855	11.564	0.50	0.28372	0.49804	0.29
10.905	11.584	0.31	0.39345	0.60985	0.16
10.955	11.605	0.30	0.39248	0.54212	0.15
11.005	11.625	0.53	0.30588	0.60794	0.29
11.055	11.646	0.26	0.28044	0.44075	0.18
11.105	11.666	0.66	0.22084	0.52963	0.42
11.155	11.687	0.49	0.25779	0.44742	0.31
11.205	11.707	0.72	0.32934	0.54412	0.34
11.255	11.727	0.45	0.28926	0.44710	0.27
11.305	11.748	0.52	0.35519	0.69498	0.26
11.355	11.768	0.31	0.24351	0.53456	0.23
11.405	11.789	0.41	0.26521	0.54962	0.27
11.455	11.809	0.53	0.26072	0.51164	0.32
11.505	11.830	0.63	0.31617	0.62587	0.32
11.555	11.850	0.45	0.21347	0.47779	0.33
11.605	11.871	0.60	0.24778	0.65044	0.37
11.655	11.891	0.56	0.25033	0.54914	0.35
11.705	11.912	0.75	0.20871	0.76999	0.46
11.755	11.932	0.46	0.18209	0.49558	0.38
11.805	11.952	0.67	0.21100	0.59131	0.43
11.855	11.973	0.99	0.20964	0.72509	0.53
11.905	11.993	1.85	0.23416	0.99953	0.65
11.955	12.010	1.69	0.13284	0.73345	0.75
12.005	12.034	2.43	0.01775	1.00735	0.97
12.055	12.055	0.87	0.01926	0.93124	0.92
12.105	12.075	0.76	0.03902	0.61998	0.82
12.155	12.096	0.52	0.06933	0.26091	0.64
12.205	12.116	0.25	0.09168	0.31461	0.39
12.255	12.146	0.21	0.04728	0.13132	0.51
12.305	12.171	1.60	0.04980	1.24805	0.88
12.355	12.197	2.22	0.02497	1.10841	0.95
12.405	12.222	0.96	0.01732	0.89636	0.93
12.455	12.248	2.00	0.02823	0.65747	0.94
12.505	12.274	1.13	0.03729	0.63957	0.88
12.555	12.299	0.74	0.16145	0.66912	0.52
12.605	12.325	0.66	0.25923	0.61386	0.38
12.655	12.350	0.68	0.26801	0.48311	0.38
12.705	12.376	0.86	0.23780	0.57387	0.46
12.755	12.402	0.71	0.24210	0.51794	0.41
12.805	12.427	0.85	0.20665	0.47258	0.50
12.855	12.453	1.36	0.14720	0.47757	0.69
12.905	12.478	1.68	0.15805	0.62767	0.72
12.955	12.504	1.94	0.06323	0.69510	0.88
13.005	12.530	1.36	0.07892	0.62873	0.80
13.055	12.555	1.18	0.19946	0.78740	0.58
13.105	12.581	1.57	0.20600	0.80399	0.64
13.155	12.606	0.92	0.21622	0.61497	0.50
13.205	12.632	0.90	0.20716	0.67694	0.51
13.255	12.658	0.93	0.20090	0.77046	0.52
13.305	12.683	0.94	0.18050	0.61714	0.55
13.355	12.709	1.32	0.18382	0.64871	0.63
13.405	12.734	1.11	0.14241	0.63795	0.65
13.455	12.760	1.22	0.15252	0.71355	0.66
13.505	12.786	1.45	0.16112	0.82490	0.68
13.555	12.811	0.63	0.14081	0.77316	0.52
13.605	12.837	1.46	0.13397	0.72153	0.72
13.655	12.862	1.28	0.13546	0.65869	0.69
13.705	12.888	1.59	0.12638	0.79194	0.75
13.755	12.914	2.06	0.07532	0.62577	0.87
13.805	12.939	1.22	0.15917	0.59708	0.65
13.855	12.965	1.25	0.12134	0.72353	0.71
13.905	12.990	1.21	0.12482	0.69056	0.70
13.955	13.016	1.30	0.14816	0.63625	0.68
14.005	13.042	1.63	0.13109	0.50817	0.75
14.055	13.067	1.45	0.16597	0.67036	0.67
14.105	13.093	1.10	0.14943	0.66401	0.64
14.155	13.118	1.56	0.12662	0.54794	0.75
14.205	13.144	1.48	0.10098	0.43306	0.78
14.255	13.170	1.79	0.14390	0.69579	0.75
14.305	13.195	1.89	0.12177	0.66348	0.79
14.355	13.221	2.09	0.12765	0.63802	0.80
14.405	13.246	1.88	0.12545	0.59371	0.78
14.455	13.272	1.82	0.11881	0.62820	0.78
14.505	13.298	2.86	0.11338	0.97962	0.86
14.555	13.323	3.79	0.07745	1.14106	0.92
14.605	13.349	3.28	0.03018	1.32611	0.96
14.655	13.374	2.98	0.08640	1.04347	0.89
14.705	13.400	3.10	0.11404	1.19391	0.87
14.755	13.426	3.58	0.11343	1.25264	0.88
14.805	13.451	3.96	0.12962	1.25531	0.88
14.855	13.477	3.33	0.13933	1.10431	0.85
14.905	13.502	2.53	0.13811	1.14099	0.81
14.955	13.528	3.13	0.12087	1.40380	0.86
15.005	13.554	3.33	0.14371	1.43792	0.85
15.055	13.579	2.93	0.12744	1.09316	0.85
15.105	13.605	3.18	0.15559	1.32636	0.83
15.155	13.630	3.16	0.09550	1.06104	0.89
15.205	13.656	2.88	0.10795	1.25277	0.86
15.255	13.682	3.66	0.10982	1.18071	0.89
15.305	13.707	2.97	0.11830	1.33874	0.86
15.355	13.733	2.73	0.11478	1.08195	0.85
15.405	13.758	2.35	0.12128	1.14899	0.82
15.455	13.784	2.36	0.13261	0.88052	0.81
15.505	13.810	1.90	0.13376	0.85469	0.77
15.555	13.835	1.69	0.13950	0.81475	0.74
15.605	13.861	1.51	0.18691	0.69803	0.66
15.655	13.886	1.21	0.19842	0.72054	0.59
15.705	13.912	1.62	0.19737	0.82116	0.66
15.755	13.938	1.40	0.15928	0.62936	0.68
15.805	13.963	1.35	0.15113	0.74144	0.68
15.855	13.989	1.61	0.11385	0.67066	0.77
15.905	14.014	1.73	0.10345	0.80630	0.80
15.955	14.040	1.74	0.08373	0.68113	0.83
16.005	14.066	1.81	0.10072	0.97232	0.81
16.055	14.091	1.83	0.07826	0.84936	0.85
16.105	14.117	2.56	0.11792	1.39836	0.84
16.155	14.142	2.44	0.10074	1.40769	0.85
16.205	14.168	2.28	0.06364	0.52092	0.90
16.255	14.194	2.47	0.09954	0.71917	0.86
16.305	14.219	2.51	0.08315	0.54785	0.88
16.355	14.245	4.91	0.11575	0.35290	0.91
16.405	14.270	3.07	0.08177	0.29119	0.90
16.455	14.296	2.48	0.07117	0.36070	0.89
16.505	14.322	2.43	0.05948	0.43176	0.91
16.555	14.347	1.74	0.03801	0.28109	0.92
16.605	14.373	1.68	0.04379	0.54140	0.90
16.655	14.398	1.06	0.02898	0.27664	0.90
16.705	14.424	1.14	0.03086	0.33806	0.90
16.755	14.450	0.90	0.02236	0.28410	0.91
16.805	14.475	0.88	0.01933	0.25343	0.92
16.855	14.501	1.22	0.03637	0.28043	0.89
16.905	14.526	1.29	0.04089	0.37400	0.88
16.955	14.552	0.96	0.02020	0.16403	0.92
17.005	14.578	0.77	0.01405	0.28624	0.93
17.055	14.603	0.98	0.01609	0.31419	0.94
17.105	14.629	1.11	0.01405	0.28097	0.95
17.155	14.654	0.64	0.01623	0.24710	0.90
17.205	14.680	0.64	0.01156	0.24527	0.93
17.255	14.706	0.53	0.01057	0.21591	0.92
17.305	14.731	0.54	0.02103	0.22651	0.86
17.355	14.757	0.49	0.01926	0.20921	0.86
17.405	14.782	0.55	0.02352	0.30721	0.85
17.455	14.808	0.77	0.02281	0.24580	0.89
17.505	14.834	0.59	0.02119	0.20856	0.87
17.555	14.859	0.74	0.02356	0.22944	0.88
17.605	14.885	0.40	0.02106	0.24506	0.82
17.655	14.910	0.37	0.02137	0.26833	0.81
17.705	14.936	0.49	0.02255	0.23264	0.84
17.755	14.962	0.55	0.02392	0.27286	0.84
17.805	14.987	0.60	0.01881	0.20141	0.88