Citation:

PANGAEA.896166

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Abstract:

Here we use Mg/Ca temperature estimates from subsurface and thermocline dwelling foraminifera to reconstruct the meridional Plio‐Pleistocene evolution of the Southeast Pacific thermocline, in relation to atmospheric circulation changes. Our data indicate a change in the thermocline, responding to the northward displacement of the Intertropical Convergence Zone/South Pacific High system between ~3.8 and 3.5 Ma. After 3.5 Ma, we record a second major phase of thermocline shoaling, which points to the ITCZ/SPH‐system movement toward its modern position along with the gradual cooling of the Northern Hemisphere and its associated glaciation.

Supplement to:

Ronge, Thomas A; Nürnberg, Dirk; Tiedemann, Ralf (2020): Plio‐Pleistocene Variability of the East Pacific Thermocline and Atmospheric Systems. Paleoceanography and Paleoclimatology, 35(1), e2019PA003758, https://doi.org/10.1029/2019PA003758

Project(s):

Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)

Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas (SPP1158)

Funding:

German Research Foundation (DFG), grant/award no. 5472008 : Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas

Coverage:

Median Latitude: -21.358983 * Median Longitude: -81.436080 * South-bound Latitude: -21.359010 * West-bound Longitude: -81.436160 * North-bound Latitude: -21.358960 * East-bound Longitude: -81.436000

Date/Time Start: 2002-04-22T13:45:00 * Date/Time End: 2002-04-24T08:45:00

Minimum Elevation: -1323.7 m * Maximum Elevation: -1322.5 m

Event(s):

202-1236A * Latitude: -21.358980 * Longitude: -81.436000 * Date/Time Start: 2002-04-22T13:45:00 * Date/Time End: 2002-04-23T13:40:00 * Elevation: -1323.7 m * Penetration: 207.7 m * Recovery: 197.23 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 24 cores; 207.7 m cored; 0 m drilled; 95 % recovery

202-1236B * Latitude: -21.359010 * Longitude: -81.436080 * Date/Time Start: 2002-04-23T13:40:00 * Date/Time End: 2002-04-24T08:45:00 * Elevation: -1322.5 m * Penetration: 122.8 m * Recovery: 125.1 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 122.8 m cored; 0 m drilled; 101.9 % recovery

202-1236C * Latitude: -21.358960 * Longitude: -81.436160 * Date/Time: 2002-04-24T08:45:00 * Elevation: -1322.5 m * Penetration: 167.3 m * Recovery: 167.74 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 18 cores; 164.5 m cored; 2.8 m drilled; 102 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Ronge, Thomas A
2	Sample code/label	Sample label		Ronge, Thomas A	DSDP/ODP/IODP sample designation
3	Depth, composite	Depth comp	mcd	Ronge, Thomas A
4	AGE	Age	ka BP	Ronge, Thomas A		Geocode
5	Globorotalia inflata, Magnesium/Calcium ratio	G. inflata Mg/Ca	mmol/mol	Ronge, Thomas A
6	Mixed layer temperature	MLT	°C	Ronge, Thomas A	Calculated from Mg/Ca ratios (Groeneveld and Chiessi, 2011)	G. inflata
7	Trilobatus sacculifer, Manganese/Calcium ratio	T. sacculifer Mn/Ca	mmol/mol	Ronge, Thomas A
8	Sea surface temperature, annual mean	SST (1-12)	°C	Ronge, Thomas A	Calculated from Mg/Ca ratios (Anand et al., 2003)	T. sacculifer
9	Globorotalia tumida, Magnesium/Calcium ratio	G. tumida Mg/Ca	mmol/mol	Ronge, Thomas A
10	Photic Zone temperature	PZT	°C	Ronge, Thomas A	Calculated from Mg/Ca ratios (Anand et al., 2003)	G. tumida

License:

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

Size:

702 data points

Data

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

1 Event	2 Sample label	3 Depth comp [mcd]	4 Age [ka BP]	5 G. inflata Mg/Ca [mmol/mol]	6 MLT [°C]	7 T. sacculifer Mn/Ca [mmol/mol]	8 SST (1-12) [°C]	9 G. tumida Mg/Ca [mmol/mol]	10 PZT [°C]
202-1236B	202-1236B-1H-1,10	0.10	135.87	1.84	12.35	2.670	21.670	1.440	14.830
202-1236B	202-1236B-1H-1,12	0.12	139.80	1.81	12.11	2.800	22.200	1.530	15.440
202-1236B	202-1236B-1H-1,16	0.16	147.67	1.94	13.06	2.630	21.510	1.370	14.240
202-1236B	202-1236B-1H-1,20	0.20	155.53	1.85	12.41	2.450	20.710	1.310	13.740
202-1236B	202-1236B-1H-1,24	0.24	163.40	1.94	13.05	2.550	21.130	1.430	14.720
202-1236B	202-1236B-1H-1,28	0.28	171.27	1.84	12.34	2.730	21.920	1.290	13.590
202-1236B	202-1236B-1H-1,32	0.32	179.13	1.95	13.13	2.800	22.190	1.540	15.560
202-1236B	202-1236B-1H-1,36	0.36	187.00	2.03	13.64	2.900	22.590	1.470	15.020
202-1236B	202-1236B-1H-1,40	0.40	198.91	1.87	12.55	2.570	21.260	1.390	14.420
202-1236B	202-1236B-1H-1,44	0.44	210.82	1.92	12.88	3.030	23.080	1.480	15.130
202-1236B	202-1236B-1H-1,48	0.48	222.73	1.89	12.67	2.610	21.420	1.520	15.370
202-1236B	202-1236B-1H-1,52	0.52	234.64	2.00	13.47	2.480	20.840	1.700	16.640
202-1236B	202-1236B-1H-1,56	0.56	246.25	2.00	13.43			1.660	16.410
202-1236B	202-1236B-1H-1,60	0.60	257.55	1.93	12.99			1.520	15.380
202-1236B	202-1236B-1H-1,70	0.70	285.80	1.91	12.82	2.720	21.860	1.460	14.920
202-1236B	202-1236B-1H-1,80	0.80	310.34	2.00	13.42	2.950	22.770	1.650	16.300
202-1236B	202-1236B-1H-1,90	0.90	332.64	1.84	12.34	2.920	22.650	1.610	16.020
202-1236B	202-1236B-1H-1,100	1.00	355.86	1.93	13.00	2.700	21.780	1.330	13.960
202-1236B	202-1236B-1H-1,120	1.20	402.29	1.92	12.93	2.750	22.000	1.610	16.010
202-1236B	202-1236B-1H-1,140	1.40	473.30	1.74	11.60	2.620	21.460	1.420	14.670
202-1236B	202-1236B-1H-2,8	1.59	553.83	1.81	12.16	2.830	22.320	1.660	16.390
202-1236B	202-1236B-1H-2,28	1.79	645.54	2.15	14.37	2.730	21.900	1.680	16.510
202-1236B	202-1236B-1H-2,48	1.99	704.90	1.89	12.66	2.840	22.370	1.640	16.240
202-1236B	202-1236B-1H-2,68	2.19	749.38	1.83	12.29	2.770	22.090	1.720	16.780
202-1236B	202-1236B-1H-2,88	2.39	799.39	1.96	13.21	2.820	22.260	1.570	15.760
202-1236B	202-1236B-1H-2,128	2.79	898.61	1.95	13.11	2.830	22.300	1.930	18.030
202-1236B	202-1236B-1H-3,16	3.18	971.76	1.90	12.79	2.720	21.890	1.600	15.970
202-1236B	202-1236B-1H-3,56	3.58	1034.80	1.88	12.66	2.800	22.210	1.780	17.150
202-1236B	202-1236B-1H-3,96	3.98	1148.80	1.76	11.78	2.740	21.950	1.700	16.650
202-1236B	202-1236B-1H-3,136	4.38	1247.90	1.85	12.45	2.830	22.330	1.740	16.940
202-1236B	202-1236B-1H-4,24	4.77	1333.80	2.00	13.44	3.220	23.740	1.880	17.740
202-1236B	202-1236B-1H-4,64	5.17	1438.50	1.94	13.06	2.980	22.880	1.760	17.030
202-1236B	202-1236B-1H-4,104	5.57	1516.10	1.64	10.83	2.780	22.130	1.920	17.980
202-1236B	202-1236B-1H-4,144	5.97	1632.50	1.90	12.79	2.640	21.540	1.770	17.110
202-1236B	202-1236B-1H-5,32	6.36	1695.20	1.87	12.57	2.880	22.520	1.930	18.060
202-1236B	202-1236B-1H-5,72	6.76	1774.70	1.93	12.95	2.740	21.940	2.090	18.920
202-1236C	202-1236C-1H-3,76	7.15	1862.20					1.900	17.900
202-1236C	202-1236C-1H-3,116	7.55	1953.00	1.92	12.88	2.700	21.790	1.690	16.570
202-1236C	202-1236C-1H-4,4	7.94	2062.10	2.18	14.55	3.010	22.980	1.860	17.620
202-1236C	202-1236C-1H-4,44	8.34	2135.10	1.75	11.71	2.980	22.870	1.900	17.890
202-1236C	202-1236C-1H-4,84	8.74	2206.40	1.68	11.14	2.880	22.490	1.720	16.790
202-1236C	202-1236C-1H-4,124	9.14	2277.70	2.04	13.73	3.130	23.430	1.950	18.140
202-1236C	202-1236C-1H-5,0	9.40	2323.00	1.72	11.47	4.040	26.265	1.911	17.947
202-1236C	202-1236C-1H-5,40	9.80	2377.90	1.92	12.87	3.374	24.263	1.941	18.120
202-1236C	202-1236C-1H-5,80	10.20	2434.40	1.79	11.98	3.223	23.754	1.948	18.160
202-1236C	202-1236C-1H-5,120	10.60	2490.90	1.71	11.36	2.678	21.696	2.001	18.458
202-1236C	202-1236C-1H-6,9	11.00	2547.20	1.86	12.50	2.944	22.748	2.040	18.673
202-1236C	202-1236C-1H-6,49	11.40	2603.20	1.86	12.52	2.911	22.623	2.023	18.580
202-1236C	202-1236C-1H-6,89	11.80	2659.20	1.96	13.20	2.755	22.011	1.956	18.205
202-1236C	202-1236C-1H-6,129	12.20	2715.10	1.73	11.52	2.530	21.064	1.969	18.279
202-1236B	202-1236B-2H-3,49	12.58	2782.40	2.12	14.20	2.828	22.302	2.135	19.178
202-1236B	202-1236B-2H-3,89	12.98	2869.00	2.01	13.51	2.906	22.604	1.826	17.441
202-1236B	202-1236B-2H-3,129	13.38	2969.40	1.86	12.45	2.809	22.227	2.239	19.707
202-1236B	202-1236B-2H-4,20	13.80	3051.20	2.05	13.74	2.695	21.766	1.945	18.143
202-1236B	202-1236B-2H-4,60	14.20	3115.90	2.05	13.78	2.711	21.832	2.189	19.456
202-1236B	202-1236B-2H-4,100	14.60	3170.40	2.06	13.81	2.865	22.446	1.994	18.419
202-1236B	202-1236B-2H-4,140	15.00	3222.10	1.98	13.32	2.903	22.593	2.131	19.158
202-1236B	202-1236B-2H-5,30	15.40	3273.70	1.89	12.73	2.950	22.771	2.322	20.111
202-1236B	202-1236B-2H-5,70	15.80	3325.40	2.07	13.87	2.963	22.820	2.351	20.249
202-1236C	202-1236C-2H-3,41	16.30	3390.00	2.21	14.74	2.614	21.427	2.121	19.105
202-1236C	202-1236C-2H-3,81	16.70	3441.60	2.29	15.23	2.574	21.256	2.309	20.049
202-1236C	202-1236C-2H-3,121	17.10	3493.30	2.22	14.84	3.187	23.630	2.226	19.642
202-1236C	202-1236C-2H-4,10	17.50	3544.90	2.10	14.05	2.593	21.338	2.338	20.188
202-1236C	202-1236C-2H-4,50	17.90	3621.50	2.00	13.47	2.508	20.967	2.009	18.502
202-1236C	202-1236C-2H-4,90	18.30	3699.30	2.23	14.87	2.531	21.069	2.107	19.032
202-1236C	202-1236C-2H-4,130	18.70	3768.90	2.13	14.27	2.493	20.901	2.188	19.451
202-1236C	202-1236C-2H-5,19	19.10	3833.80	2.14	14.31	2.680	21.704	1.921	18.005
202-1236C	202-1236C-2H-5,59	19.50	3880.10	2.16	14.43	2.533	21.078	1.638	16.234
202-1236C	202-1236C-2H-5,99	19.90	3928.10	2.38	15.73	2.348	20.235	1.718	16.764
202-1236C	202-1236C-2H-5,139	20.30	3981.40	2.05	13.77	2.313	20.068	1.575	15.798
202-1236C	202-1236C-2H-6,28	20.70	4046.60	2.25	14.98	2.380	20.385	1.962	18.239
202-1236B	202-1236B-3H-2,39	21.12	4118.30	2.39	15.81	2.516	21.003	1.961	18.234
202-1236B	202-1236B-3H-2,79	21.52	4186.50	2.11	14.17	2.432	20.626	1.656	16.355
202-1236B	202-1236B-3H-2,119	21.92	4247.70			2.528	21.056	1.588	15.890
202-1236B	202-1236B-3H-3,8	22.32	4303.20			2.357	20.277	1.661	16.389
202-1236B	202-1236B-3H-3,48	22.72	4353.40			2.680	21.704	2.177	19.395
202-1236B	202-1236B-3H-3,88	23.12	4395.20			2.670	21.663	2.186	19.441
202-1236B	202-1236B-3H-3,128	23.52	4432.20			2.731	21.914	2.097	18.979
202-1236B	202-1236B-3H-4,17	23.92	4474.40			2.428	20.607	1.950	18.171
202-1236B	202-1236B-3H-4,57	24.32	4517.60			2.138	19.194	2.025	18.591
202-1236B	202-1236B-3H-4,97	24.72	4560.80			2.509	20.972	1.674	16.476
202-1236B	202-1236B-3H-4,137	25.12	4598.10			2.610	21.410	1.797	17.263
202-1236B	202-1236B-3H-5,26	25.52	4628.10			2.632	21.504	2.010	18.508
202-1236C	202-1236C-3H-2,79	25.94	4656.90			2.369	20.334	2.062	18.792
202-1236C	202-1236C-3H-2,119	26.34	4683.30			2.382	20.395	2.075	18.862
202-1236C	202-1236C-3H-3,8	26.74	4709.80			2.325	20.126	2.275	19.884
202-1236C	202-1236C-3H-3,48	27.14	4736.30			2.612	21.419	2.240	19.712
202-1236C	202-1236C-3H-3,88	27.54	4764.50			2.509	20.972	2.418	20.561
202-1236C	202-1236C-3H-3,128	27.94	4794.90			2.193	19.476	2.158	19.297
202-1236C	202-1236C-3H-4,17	28.34	4825.60			2.525	21.043	2.185	19.436
202-1236C	202-1236C-3H-4,57	28.74	4862.90					2.199	19.507
202-1236C	202-1236C-3H-4,97	29.14	4901.00			2.450	20.707	2.247	19.746
202-1236A	202-1236A-4H-2,30	29.54	4938.90
202-1236A	202-1236A-4H-2,34	29.58	4942.00					2.367	20.325
202-1236A	202-1236A-4H-2,74	29.98	4972.60					2.029	18.613
202-1236A	202-1236A-4H-2,114	30.38	5013.60					2.015	18.536