Citation:

j.quascirev.2010.06.027

Name: Ratio of Diene/Triene of sediment core NBP01-01-JPC24
Published: 2010
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Micropaleontological and biomarker data from two high-accumulation marine sites from the Coastal and Continental Shelf Zone (CCSZ) off East Antarctica (Adélie Land at w140°E and eastern Prydz Bay at w77°E) are used to reconstruct Holocene changes in sea ice and wind stress at the basin-wide scale. These data demonstrate congruent increase in sea-ice concentration/persistence and wind stress-related sea-surface turbulence in the two regions since 7 cal ka BP, with a particularly strong signal since 4.5 - 3.5 cal ka BP. Comparison of these high latitude records with sea ice and turbulence records from the southern mid-latitudes highlights distinctive climatic evolutions according to the different latitudinal bands. Sea-ice persistence and turbulence increase in East Antarctica CCSZ are opposite to sea-surface warming and sea-ice retreat recorded after 4.5 - 3.5 cal ka BP in the East Atlantic and Indian sector between 55 and 45°S. At the same period, paleodata suggest SST cooling in all major coastal upwelling systems of the southern hemisphere, caused by the northward transport of subpolar surface waters as a response to southern Westerlies reinforcement. We therefore propose, as suggested for the northern hemisphere, that Holocene changes in the latitudinal insolation gradient, primarily forced by obliquity and precession and amplified by sea-ice and glacial-ice expansions in the Antarctic realm, are responsible for the observed contrasted latitudinal patterns of southern latitudes.

Related to:

Denis, Delphine; Crosta, Xavier; Barbara, Loïc; Massé, Guillaume; Renssen, Hans; Ther, Olivier; Giraudeau, Jacques (2010): Sea ice and wind variability during the Holocene in East Antarctica: insight on middleehigh latitude coupling. Quaternary Science Reviews, 29, 3709-3719, https://doi.org/10.1016/j.quascirev.2010.08.007

Coverage:

Latitude: -68.694000 * Longitude: 76.711900

Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 15.72 m

Event(s):

NBP01-01-JPC24 * Latitude: -68.694000 * Longitude: 76.711900 * Elevation: -816.0 m * Method/Device: Jumbo Piston Core (JPC)

Comment:

Age is given in calendar years BP.Data were obtained within the framework of ERC StG ICEPROXY project (Grant number: 203441) and ANR CLIMICE project (ANR-08-CEXC-012-01), provided for the data compilation of the Past4Future Project.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	DEPTH, sediment/rock	Depth sed	m		Geocode
2	AGE	Age	ka BP		Geocode
3	Diene/Triene highly branched isoprenois, ratio	HBI-diene/triene		Massé, Guillaume

License:

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

Size:

238 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 HBI-diene/triene
0.00	0.667	1.561
0.04	0.709	1.166
0.12	0.792	1.017
0.20	0.875	0.763
0.28	0.958	1.193
0.36	1.041	0.623
0.44	1.124	1.469
0.52	1.207	1.300
0.60	1.290	1.454
0.68	1.373	1.215
0.76	1.457	1.368
0.84	1.540	1.503
0.92	1.623	1.336
1.00	1.706	1.756
1.08	1.789	1.451
1.20	1.914	1.566
1.28	1.997	1.519
1.36	2.080	1.076
1.44	2.163	1.042
1.52	2.246	1.244
1.60	2.329	1.104
1.68	2.412	1.719
1.76	2.495	1.347
1.84	2.579	1.752
1.92	2.662	0.994
2.00	2.745	1.173
2.08	2.828	1.978
2.16	2.911	1.192
2.24	2.994	1.399
2.32	3.077	1.106
2.40	3.160	0.904
2.48	3.243	0.854
2.56	3.327	1.077
2.64	3.410	0.842
2.72	3.493	0.999
2.80	3.576	0.825
2.88	3.659	1.691
2.96	3.742	1.074
3.00	3.784	0.993
3.04	3.825	1.129
3.12	3.908	0.643
3.20	3.991	1.257
3.28	4.075	0.347
3.36	4.158	0.635
3.44	4.241	0.920
3.52	4.324	0.655
3.60	4.407	0.422
3.68	4.490	0.556
3.76	4.573	0.454
3.84	4.656	0.172
3.92	4.739	0.568
4.00	4.823	0.529
4.08	4.906	0.456
4.16	4.989	0.208
4.24	5.072	0.681
4.32	5.155	0.472
4.40	5.238	0.494
4.48	5.321	0.210
4.56	5.404	1.086
4.64	5.487	1.296
4.72	5.570	0.624
4.80	5.654	0.660
4.88	5.737	0.349
4.96	5.820	0.301
5.00	5.861	0.455
5.04	5.903	0.283
5.12	5.986	0.417
5.20	6.069	0.313
5.28	6.152	0.240
5.36	6.235	0.427
5.44	6.318	0.746
5.52	6.402	0.569
5.60	6.485	0.168
5.68	6.568	0.613
5.76	6.651	0.662
5.84	6.734	0.364
5.92	6.817	0.510
6.00	6.900	0.315
6.08	6.983	0.346
6.16	7.066	0.184
6.24	7.150	0.345
6.32	7.233	0.464
6.40	7.316	0.353
6.48	7.399	0.166
6.56	7.482	0.100
6.64	7.565	0.016
6.72	7.648	0.427
6.80	7.731	0.629
6.88	7.814	0.478
6.96	7.898	0.080
7.00	7.939	0.319
7.04	7.981	0.167
7.12	8.064	0.137
7.20	8.147	0.254
7.36	8.313	0.039
7.44	8.396	0.740
7.52	8.439	0.154
7.60	8.469	0.070
7.68	8.499	0.489
7.76	8.528	0.207
7.84	8.558	0.160
7.92	8.588	0.261
8.00	8.617	0.286
8.08	8.647	0.257
8.16	8.677	0.016
8.24	8.706	0.036
8.32	8.736	0.024
8.40	8.766	0.034
8.48	8.795	0.436
8.56	8.825	0.118
8.64	8.855	0.286
8.72	8.885	0.270
8.80	8.914	0.041
8.88	8.944	0.159
8.96	8.984	0.020
9.00	9.007	0.159
9.04	9.030	0.101
9.12	9.077	0.063
9.20	9.123	0.156
9.28	9.157	0.081
9.36	9.180	0.115
9.44	9.202	0.213
9.52	9.224	0.073
9.60	9.247	0.079
9.68	9.269	0.025
9.76	9.292	0.218
9.84	9.314	0.040
9.92	9.337	0.231
10.00	9.359	0.125
10.08	9.381	0.082
10.16	9.404	0.210
10.24	9.426	0.008
10.32	9.449	0.112
10.40	9.471	0.050
10.48	9.493	0.105
10.56	9.516	0.056
10.64	9.538	0.031
10.72	9.561	0.050
10.80	9.583	0.646
10.88	9.606	0.411
10.96	9.628	0.045
11.00	9.639	0.143
11.04	9.650	0.062
11.12	9.673	0.230
11.20	9.695	0.221
11.28	9.718	0.219
11.36	9.740	0.171
11.44	9.762	0.473
11.52	9.785	0.622
11.60	9.807	0.856
11.68	9.830	0.489
11.76	9.852	0.287
11.84	9.875	0.208
11.92	9.897	0.252
12.00	9.919	0.194
12.08	9.942	0.346
12.16	9.964	0.604
12.24	9.987	0.351
12.32	10.009	0.264
12.40	10.031	0.050
12.48	10.054	0.644
12.56	10.076	0.688
12.64	10.099	0.396
12.72	10.121	0.540
12.80	10.144	2.201
12.88	10.166	0.158
12.96	10.188	0.926
13.00	10.200	0.257
13.04	10.211	0.513
13.08	10.222	0.255
13.12	10.233	0.140
13.16	10.244	0.297
13.20	10.256	0.404
13.24	10.267	0.565
13.28	10.278	0.156
13.32	10.290	0.594
13.36	10.302	0.440
13.40	10.315	0.541
13.44	10.328	0.517
13.48	10.341	0.314
13.50	10.347	0.337
13.52	10.354	0.172
13.56	10.366	0.275
13.60	10.379	0.641
13.64	10.392	1.090
13.68	10.405	0.563
13.72	10.417	0.474
13.76	10.430	1.292
13.80	10.443	0.437
13.84	10.456	1.304
13.88	10.469	0.536
13.92	10.481	0.647
13.96	10.494	0.582
14.00	10.507	0.471
14.04	10.520	1.015
14.08	10.532	0.305
14.12	10.545	0.313
14.16	10.558	0.357
14.20	10.571	0.394
14.24	10.584	0.133
14.28	10.596	0.501
14.32	10.609	0.414
14.36	10.622	0.453
14.40	10.635	0.875
14.44	10.647	1.581
14.48	10.660	1.209
14.50	10.667	0.371
14.52	10.673	0.893
14.56	10.686	0.719
14.60	10.699	1.501
14.64	10.711	1.438
14.68	10.724	0.859
14.72	10.737	1.082
14.76	10.750	0.607
14.80	10.762	0.832
14.84	10.775	0.352
14.88	10.788	0.322
14.92	10.801	1.135
14.96	10.813	0.261
15.00	10.826	0.317
15.04	10.839	1.352
15.08	10.852	3.709
15.12	10.865	6.552
15.16	10.877	1.307
15.20	10.890	0.696
15.24	10.903	0.398
15.28	10.916	0.467
15.32	10.928	0.471
15.36	10.941	0.138
15.44	10.967	0.417
15.48	10.980	0.373
15.50	10.986	0.117
15.52	10.992	0.367
15.56	11.005	0.279
15.60	11.018	0.077
15.64	11.031	0.148
15.68	11.043	0.339
15.72	11.056	0.224