Citation:

jqs.2623

Name: Nannoplankton abundances and accumulation rates of the last 24 ka BP of sediment core MD03-2699
Published: 2013
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

A high-resolution coccolithophore study allowed reconstructing sea surface conditions during the last 24 ka BP off the Iberian Margin. Variations in nannoplankton accumulation rate, cold-water species, Florisphaera profunda, Umbilicosphaera sibogae and Coccolithus pelagicus ssp. azorinus trends suggest the occurrence of substantial changes in surface water dynamics. Palaeoproductivity shows changes during the glacial and the interglacial transition from intense glacial upwelling to persistent interglacial stratification. A drastic productivity decline occurred between ~18 and 13 ka BP related to the arrival of subpolar waters indicated by the presence of the subarctic subspecies C. pelagicus pelagicus and increased percentages of tetra-unsaturated alkenones. Abrupt variability at core MD03-2699 during the last 24 ka BP was observed in palaeoproductivity and sea surface temperatures proxies. Increases of reworked species fluxes were observed during the Last Glacial Maximum and during the transition to the Holocene, likely connected to turbidity currents and/or contourites formed by Mediterranean outflow intensification. In addition, C. pelagicus ssp. pelagicus presence, Gephyrocapsa muellerae and tetra-alkenone percentages reveal rapid coolings coeval with the Holocene Bond cycles and rapid climate coolings recognized for the Northern Hemisphere between 11.02 and 1.7 ka BP and associated with subpolar water arrival at the site.

Further details:

Rodrigues, Teresa; Grimalt, Joan O; Abrantes, Fatima F; Naughton, Filipa; Flores, José-Abel (2010): (Table 2) Age determination of sediment core MD03-2699. PANGAEA, https://doi.org/10.1594/PANGAEA.836237 (Radiocarbon ages of sediment core MD03-2699)

Coverage:

Latitude: 39.036700 * Longitude: -10.660500

Minimum Elevation: -1865.0 m * Maximum Elevation: -1865.0 m

Event(s):

MD03-2699 * Latitude: 39.036700 * Longitude: -10.660500 * Elevation: -1865.0 m * Recovery: 26.56 m * Location: Iberian slope * Campaign: (PICABIA) * Basis: * Method/Device: Calypso Corer (CALYPSO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	AGE	Age	ka BP			Geocode
2	Emiliania huxleyi	E. huxleyi	%	Palumbo, Eliana	Counting, coccoliths
3	Coccolithus pelagicus ssp. pelagicus	C. pelagicus ssp. pelagicus	%	Palumbo, Eliana	Counting, coccoliths
4	Gephyrocapsa muellerae	G. muellerae	%	Palumbo, Eliana	Counting, coccoliths
5	Nannofossils, cold water taxa	Nannos cold	%	Palumbo, Eliana	Counting, coccoliths
6	Nannofossils, warm water taxa	Nannos warm	%	Palumbo, Eliana	Counting, coccoliths
7	Umbilicosphaera sibogae	U. sibogae	%	Palumbo, Eliana	Counting, coccoliths
8	Florisphaera profunda	F. profunda	%	Palumbo, Eliana	Counting, coccoliths
9	Nannofossils, reworked fossil	Nannos rew fossil	%	Palumbo, Eliana	Counting, coccoliths
10	Preservation index	CEX'		Palumbo, Eliana	Calculated	CEX' = %[(E. huxleyi + small Gephyrocapsa)/(E. huxleyi + small Gephyrocapsa + C. leptoporus)]
11	Preservation	Preserv		Palumbo, Eliana	Calculated
12	Coccoliths	Cocco	10⁶ #/g	Palumbo, Eliana	Calculated
13	Accumulation rate, nannofossils	Acc rate nannos	10⁶ #/cm²/ka	Palumbo, Eliana	Calculated
14	Accumulation rate, nannofossils, reworked	Acc rate nannos rew	10⁶ #/cm²/ka	Palumbo, Eliana	Calculated

License:

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

Size:

1946 data points

Data

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

1 Age [ka BP]	2 E. huxleyi [%]	3 C. pelagicus ssp. pelagicus [%]	4 G. muellerae [%]	5 Nannos cold [%]	6 Nannos warm [%]	7 U. sibogae [%]	8 F. profunda [%]	9 Nannos rew fossil [%]	10 CEX'	11 Preserv	12 Cocco [10⁶ #/g]	13 Acc rate nannos [10⁶ #/cm²/ka]	14 Acc rate nannos rew [10⁶ #/cm²/ka]
0.93	0.00	0.27	0.27	0.54	2.42	0.81	2.69	0.54	1.00	9	6151
1.10	0.00	0.26	0.00	0.26	2.83	1.29	1.80	0.26	1.00	8	6432
1.28	0.00	0.00	2.49	2.49	4.05	1.25	3.12	0.31	1.00	7	5308	85033	530
1.45	0.00	0.29	0.00	0.29	2.60	1.71	1.73	1.16	1.00	6	4291	65488	568
1.62	0.58	0.29	0.00	0.29	3.76	1.45	2.02	0.29	1.00	8	5721	89410	258
1.79	0.47	0.24	0.24	0.47	3.53	2.12	3.29	0.47	1.00	8	10542	164564	1162
1.96	0.00	0.00	0.66	0.66	3.99	2.99	2.66	1.00	1.00	7	4977	79063	788
2.13	0.23	0.23	0.45	0.68	1.13	0.45	4.31	0.91	0.99	7	10938	188100	853
2.31	0.00	0.32	0.32	0.64	1.60	0.32	0.32	0.64	1.00	8	5159	92805	2082
2.48	0.00	0.81	0.54	1.34	2.15	1.61	0.00	0.27	0.99	8	4613	86708	4662
2.65	0.00	0.31	4.66	4.97	2.80	0.62	3.73	1.24	0.99	6	5325	101895	1899
2.82	0.00	0.00	2.50	2.50	2.75	1.74	2.00	1.25	1.00	6	6614	131948	990
2.99	1.15	0.23	0.69	0.92	1.84	0.23	5.06	0.46	1.00	7	7193	147004	338
3.15	0.77	0.51	1.03	1.54	4.10	2.05	2.56	0.26	0.99	8	9673	216829	1112
3.30	0.00	0.62	0.00	0.62	0.62	0.31	2.17	0.00	1.00	8	7987	196409	6100
3.45	0.83	0.28	0.28	0.56	2.78	2.22	3.33	1.11	1.00	7	8929	222260	617
3.60	0.00	0.00	0.00	0.00	2.54	1.13	2.26	0.00	1.00	8	4390	109929	5900
3.75	0.80	0.53	0.27	0.80	3.46	1.60	6.65	0.27	1.00	8	9326	232250	0
3.91	0.00	0.00	0.93	0.93	2.78	0.93	0.00	0.62	0.99	8	5358	140252	6060
4.06	0.62	0.62	0.93	1.56	3.43	1.87	1.56	0.00	0.99	7	5308	138615	432
4.21	0.33	0.00	0.33	0.33	3.31	0.66	3.97	1.32	1.00	7	7491	199092	1318
4.36	0.00	0.00	3.10	3.10	3.36	1.81	1.81	1.03	1.00	8	6399	169736	3070
4.51	0.00	0.00	4.57	4.57	2.44	1.22	2.74	0.91	1.00	9	8136	220510	3361
4.66	0.96	0.00	0.64	0.64	1.92	0.32	5.13	0.64	1.00	7	7739	205283	0
4.81	0.00	0.00	0.00	0.00	2.81	2.25	4.49	0.00	0.99	8	8830	239024	8728
4.96	0.82	0.00	0.27	0.27	1.90	0.54	5.16	0.00	1.00	8	9128	245212	0
5.11	0.00	0.00	0.00	0.00	1.14	0.23	0.23	0.00	1.00	8	10864	289443	9252
5.26	0.33	0.00	0.00	0.00	2.67	0.67	7.67	1.00	1.00	7	7441	201741	672
5.41	0.00	0.00	1.67	1.67	2.22	0.56	1.67	1.11	0.99	8	8929	241418	671
5.56	0.00	0.29	0.29	0.58	2.61	0.58	2.32	0.58	1.00	9	8557	236543	0
5.71	0.00	0.51	0.51	1.01	3.79	2.02	3.28	0.25	0.99	8	6548	184133	465
5.93	0.00	0.00	0.47	0.47	0.71	0.47	0.47	1.18	1.00	7	10467	201159	6197
6.21	0.00	0.00	0.00	0.00	2.78	1.71	3.42	1.71	1.00	8	7739	117723	0
6.49	0.00	0.00	0.00	0.00	1.67	0.71	0.24	0.48	0.99	8	6945	105659	6038
6.78	0.00	0.00	0.30	0.30	3.04	0.91	2.13	2.43	1.00	8	8136	122916	749
7.06	0.00	0.00	0.61	0.61	1.21	1.21	0.00	0.00	1.00	8	5457	81531	3459
7.34	0.00	0.00	0.78	0.78	3.62	1.03	2.33	0.26	1.00	8	6399	94601	0
7.63	0.00	0.27	0.55	0.82	3.29	1.36	2.19	0.82	0.99	6	4527	66999	184
7.91	1.30	0.33	0.98	1.30	2.28	0.98	5.86	0.00	1.00	7	7615	113030	736
8.19	0.58	0.29	1.75	2.05	3.22	0.88	5.26	1.17	0.99	6	5655	84192	1477
8.48	0.96	0.00	1.44	1.44	2.64	0.24	4.33	0.24	0.99	8	10318	147975	356
8.76	0.63	0.00	0.63	0.63	2.95	1.48	5.27	0.00	1.00	6	11757	166432	2107
9.04	0.22	0.22	0.45	0.67	2.02	0.67	3.14	0.00	1.00	7	11062	155374	348
9.33	0.00	0.27	0.54	0.81	6.23	3.23	1.36	1.08	0.99	6	4576	63403	172
9.61	0.00	0.00	0.63	0.63	3.45	0.63	2.19	0.00	1.00	7	5275	74221	0
9.89	0.24	0.00	1.21	1.21	2.90	0.97	6.28	0.24	1.00	6	10269	147568	1069
10.18	0.96	0.24	0.72	0.96	4.58	2.41	2.41	0.00	1.00	6	10294	144306	695
10.46	0.94	0.31	1.25	1.56	2.81	2.19	4.69	0.63	0.99	7	3969	57457	1616
10.74	0.77	0.26	1.03	1.29	2.06	1.03	2.31	0.26	1.00	7	9649	138092	710
11.03	0.33	0.33	0.33	0.66	2.63	1.32	9.87	1.64	1.00	7	5027	71608	1649
11.22	1.11	0.22	0.89	1.11	2.67	1.34	0.67	0.00	1.00	7	7425	159280	355
11.31	0.63	0.31	0.31	0.63	2.52	0.63	5.66	0.94	1.00	6	3944	169529	5331
11.40	0.92	0.31	0.92	1.23	2.15	1.54	5.54	0.92	0.98	7	8061	343013	4222
11.50	0.00	0.26	0.26	0.53	3.17	1.85	0.26	1.85	0.99	7	4700	195125	9782
11.59	0.27	0.00	1.36	1.36	2.45	1.36	1.09	0.00	1.00	7	9103	373667	2036
11.69	1.90	0.32	2.22	2.53	1.90	0.63	5.38	0.00	0.99	7	7838	326196	1032
11.78	1.22	0.00	1.53	1.53	3.98	1.83	8.26	0.61	0.99	7	5407	227448	3478
11.87	1.92	0.55	1.65	2.20	2.20	0.82	10.16	0.00	0.98	7	6019	252134	2771
11.97	0.79	0.00	1.85	1.85	2.12	0.79	6.08	2.12	0.99	6	6251	264305	699
12.06	1.25	0.25	2.24	2.49	2.99	1.75	7.23	1.75	0.99	7	6631	284669	2840
12.16	2.04	0.29	2.33	2.62	1.46	0.58	7.58	1.17	0.99	7	4254	178489	0
12.60	0.96	0.00	1.59	1.59	2.87	0.96	4.78	0.32	1.00	7	5192	44508	0
13.05	2.93	0.29	7.62	7.92	1.17	0.59	0.29	0.00	1.00	9	2417	20366	60
13.50	2.20	0.94	6.60	7.55	2.83	0.94	0.31	2.20	1.00	7	1753	14952	376
13.95	0.65	0.65	0.32	0.97	2.91	1.29	0.97	0.32	1.00	7	3066	26191	85
14.40	3.25	1.30	14.29	15.58	0.65	0.00	1.30	1.95	0.99	6	1273	10665	277
14.65	4.68	0.00	10.23	10.23	0.29	0.00	0.00	0.58	1.00	6	1060	16067	0
14.90	0.00	0.00	0.00	0.00	2.10	0.30	2.10	0.30	1.00	6	2761	41705	375
15.15	0.66	0.00	2.95	2.95	2.95	1.31	2.30	0.33	0.99	7	3026	46195	151
15.40	1.52	0.30	8.21	8.51	0.91	0.61	5.78	0.61	1.00	6	2720	40783	992
15.92	3.72	0.31	0.62	0.93	1.55	0.62	0.31	1.86	1.00	6	1602	11914	553
16.43	1.13	0.28	0.00	0.28	0.85	0.28	0.28	5.07	1.00	6	2516	19166	594
16.95	0.00	1.26	0.00	1.26	2.21	0.95	0.95	0.95	1.00	6	2232	18094	0
17.47	0.00	0.00	11.11	11.11	0.00	0.00	0.93	2.78	0.99	8	1072	8573	0
17.69	8.01	1.78	7.12	8.90	1.78	0.30	0.30	2.08	1.00	6	1115	21078	250
17.90	6.17	0.00	5.56	5.56	0.00	0.00	0.31	2.78	1.00	6	1072	20198	312
18.12	5.79	0.64	11.58	12.22	0.32	0.00	0.00	2.25	1.00	8	958	16209	0
18.34	6.75	1.23	8.59	9.82	0.31	0.00	0.92	3.07	1.00	6	1078	18399	451
18.56	1.96	0.00	6.21	6.21	0.33	0.00	1.31	3.92	0.99	6	1897	32598	0
18.63	2.31	0.00	7.59	7.59	0.99	0.66	0.66	2.64	0.98	6	1670	82421	816
18.71	2.13	0.30	1.83	2.13	0.30	0.30	0.00	0.91	0.99	6	3244	162208	1488
18.79	2.18	0.00	7.48	7.48	0.62	0.00	1.56	5.61	1.00	6	2654	138887	1298
18.87	3.54	0.88	3.83	4.72	0.29	0.00	1.47	3.24	1.00	6	2803	146222	3019
18.95	3.99	0.33	6.98	7.31	0.33	0.33	0.00	1.99	1.00	6	3733	193491	4500
19.02	1.32	0.00	5.30	5.30	0.33	0.33	0.00	0.99	0.99	6	3721	191950	2559
19.10	3.00	0.33	6.00	6.33	1.33	0.00	1.00	2.33	1.00	6	2480	127381	1698
19.18	0.00	1.41	5.92	7.32	0.85	0.28	0.00	0.28	1.00	6	2516	126966	1073
19.26	2.17	0.31	4.35	4.66	0.62	0.00	0.31	3.11	1.00	6	2662	134453	1670
19.34	2.95	1.47	9.44	10.91	0.00	0.00	0.29	0.88	1.00	6	3363	169136	1497
19.41	8.95	0.32	7.03	7.35	0.00	0.00	0.00	6.71	0.99	6	1941	96372	3079
19.49	5.28	1.17	7.33	8.50	0.00	0.00	0.29	2.05	1.00	6	3383	172771	0
19.57	2.54	0.00	3.05	3.05	0.25	0.00	0.25	3.56	1.00	6	4874	245086	1871
19.65	3.36	1.53	7.95	9.48	0.31	0.00	0.00	1.53	1.00	7	3234	155110	0
19.73	1.17	0.00	7.89	7.89	0.58	0.29	0.00	3.51	1.00	6	4241	204711	1197
19.80	0.00	0.00	5.08	5.08	0.32	0.00	0.95	3.49	1.00	6	5209	247601	3930
19.88	2.02	1.15	4.90	6.05	2.02	0.58	0.58	1.44	1.00	6	4303	208974	3011
19.96	2.93	1.17	14.66	15.84	0.00	0.00	0.00	2.35	1.00	7	4217	208807	614
20.04	0.97	0.65	4.19	4.84	0.65	0.00	2.26	2.90	1.00	6	5126	261774	10133
20.11	3.99	0.33	4.65	4.98	0.33	0.00	1.33	1.00	1.00	6	4977	262793	6985
20.19	6.07	0.29	7.23	7.51	0.00	0.00	0.87	0.58	0.99	6	4291	229513	4643
20.27	1.26	0.63	8.52	9.15	0.63	0.32	1.26	0.32	1.00	7	3931	208298	1314
20.35	2.46	0.00	5.74	5.74	0.27	0.00	0.82	0.82	1.00	6	9078	469827	8986
20.43	3.00	0.00	4.90	4.90	0.54	0.27	0.54	0.54	1.00	6	9103	476416	5193
20.50	2.86	0.00	3.81	3.81	0.32	0.00	0.95	0.32	1.00	6	7813	394189	8760
20.58	1.15	0.29	9.74	10.03	0.00	0.00	0.86	0.29	1.00	7	4316	223781	643
20.66	5.85	0.00	8.00	8.00	0.92	0.00	0.31	1.54	0.99	6	4031	217870	5363
20.74	5.65	0.00	8.47	8.47	0.28	0.00	0.28	1.41	1.00	6	4390	239903	8810
20.82	4.68	0.00	7.60	7.60	0.00	0.00	0.29	2.92	1.00	6	4241	236072	5522
20.89	4.84	0.27	9.68	9.95	0.00	0.00	1.08	2.96	1.00	6	4613	253120	4763
20.97	4.26	0.00	5.47	5.47	0.61	0.30	0.91	1.22	1.00	6	5440	285702	7816
21.05	5.06	0.00	6.84	6.84	0.51	0.25	1.01	1.52	1.00	7	6532	341121	12090
21.13	1.18	0.00	5.62	5.62	0.30	0.00	0.00	1.18	1.00	6	4192	214262	9509
21.21	1.57	0.52	7.09	7.61	0.26	0.26	1.05	1.31	1.00	6	4700	245576	0
21.28	2.96	0.33	8.88	9.21	0.66	0.33	1.32	1.64	1.00	6	5027	267051	4392
21.36	2.61	0.00	8.50	8.50	0.33	0.00	0.98	3.27	0.99	6	3795	205406	4699
21.44	5.29	0.59	10.29	10.88	0.00	0.00	1.18	3.24	1.00	6	3373	183501	6477
21.52	3.69	0.00	13.23	13.23	0.00	0.00	0.31	2.77	0.99	7	3224	167168	1543
21.59	0.64	1.27	0.00	1.27	0.96	0.00	0.64	5.41	0.99	6	1731	87591	4184
21.67	0.33	0.66	0.66	1.32	1.97	0.99	0.00	0.33	1.00	8	5027	251099	4130
21.75	1.47	0.29	0.59	0.88	2.64	0.88	0.00	4.40	1.00	6	2417	118624	3827
21.83	0.33	0.00	13.36	13.36	0.33	0.33	0.00	0.98	0.99	6	1904	92550	1206
21.91	1.19	0.00	6.23	6.23	1.48	0.30	0.30	1.48	0.99	6	2388	116702	3809
21.98	1.25	0.94	2.51	3.45	1.88	0.00	0.94	2.19	1.00	6	2637	132489	0
22.04	0.33	0.00	4.67	4.67	2.67	0.00	1.67	2.67	1.00	6	2126	158321	528
22.09	3.32	1.33	1.99	3.32	0.00	0.00	0.00	5.32	1.00	7	1357	102084	3052
22.14	2.11	0.00	4.52	4.52	0.90	0.60	0.90	0.90	1.00	6	3294	249633	10527
22.19	2.93	0.00	7.04	7.04	0.88	0.29	0.88	1.47	1.00	7	5639	422892	1240
22.24	2.59	0.32	9.06	9.39	0.00	0.00	0.00	0.97	1.00	7	3832	293326	3797
22.29	2.47	0.00	10.71	10.71	0.00	0.00	0.00	2.47	1.00	6	5936	459101	1279
22.34	2.75	0.00	7.03	7.03	0.00	0.00	0.00	3.36	1.00	6	2028	154042	1884
22.39	2.48	0.00	10.22	10.22	0.00	0.00	0.31	2.79	1.00	6	3205	248163	768
22.45	0.95	0.32	0.00	0.32	0.00	0.00	0.32	6.31	1.00	6	1747	135728	428
22.50	0.95	0.32	8.54	8.86	0.63	0.00	0.00	3.48	1.00	6	980	75878	0
22.55	2.62	0.66	9.84	10.49	0.00	0.00	0.00	3.93	1.00	6	3026	227420	2983
22.60	0.00	0.00	6.23	6.23	0.59	0.30	0.30	0.89	1.00	7	5573	426998	8869
22.65	0.86	0.00	5.44	5.44	0.57	0.29	0.29	1.15	1.00	6	2877	222921	1922
22.70	1.23	0.31	8.64	8.95	0.31	0.31	0.00	1.85	1.00	6	3175	244236	763
22.75	3.24	0.29	11.50	11.80	0.88	0.59	0.59	2.06	0.99	6	3363	257640	5320
22.80	0.32	0.00	5.81	5.81	0.32	0.00	0.00	3.87	1.00	7	3076	238966	771
22.86	2.10	0.60	3.60	4.20	0.60	0.00	0.90	1.50	1.00	7	3304	253296	761
22.91	0.96	1.28	3.21	4.49	0.00	0.00	0.96	5.77	1.00	7	1935	150777	6766
22.96	3.21	0.32	11.22	11.54	0.00	0.00	0.32	3.85	1.00	6	1548	121135	1941
23.01	4.75	0.30	13.65	13.95	0.59	0.00	0.00	4.75	1.00	6	2786	216439	0
23.06	0.63	0.63	1.90	2.53	0.95	0.00	0.00	1.58	1.00	7	2239	171768	0
23.11	0.99	0.33	12.91	13.25	0.00	0.00	0.00	0.66	1.00	7	4977	395013	0
23.16	3.79	0.58	6.12	6.71	0.00	0.00	0.87	1.17	1.00	6	3403	268411	783
23.21	3.28	0.00	6.56	6.56	0.27	0.27	0.55	1.64	0.99	6	4539	362295	1980
23.27	4.25	0.33	3.27	3.59	0.00	0.00	0.00	2.94	1.00	6	2530	211629	692
23.32	2.87	0.29	5.75	6.03	0.29	0.00	0.00	2.01	1.00	6	2877	241889	0
23.37	2.27	1.30	25.65	26.95	1.30	0.32	0.65	0.97	0.99	7	1528	135832	441