Citation:

science.1138131

Name: Methylation index of Branched Tetraethers (MBT) and Cyclization ratio of Branched Tetraethers (CBT), annual mean air temperature and soil pH of sediment core GeoB6518-1 in the Congo River basin
Creator: Johan W H Weijers
Published: 2007
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

We analyzed the distribution of branched tetraether membrane lipids derived from soil bacteria in a marine sediment record that was recovered close to the Congo River outflow, and the results enabled us to reconstruct large-scale continental temperature changes in tropical Africa that span the past 25,000 years. Tropical African temperatures gradually increased from ~21° to 25°C over the last deglaciation, which is a larger warming than estimated for the tropical Atlantic Ocean. A direct comparison with sea-surface temperature estimates from the same core revealed that the land-sea temperature difference was, through the thermal pressure gradient, an important control on central African precipitation patterns.

Project(s):

Center for Marine Environmental Sciences (MARUM)

Coverage:

Latitude: -5.588300 * Longitude: 11.221700

Date/Time Start: 2000-06-20T15:23:00 * Date/Time End: 2000-06-20T15:23:00

Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 6.03 m

Event(s):

GeoB6518-1 * Latitude: -5.588300 * Longitude: 11.221700 * Date/Time: 2000-06-20T15:23:00 * Elevation: -962.0 m * Recovery: 7.41 m * Location: Congo Fan * Campaign: * Basis: * Method/Device: Gravity corer (Kiel type) (SL) * Comment: CC: olive mud

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	AGE	Age	ka BP			Geocode
3	Methylation index of branched tetraethers	MBT		Weijers, Johan W H	Calculated, see reference(s)
4	Cyclization ratio of branched tetraethers	CBT		Weijers, Johan W H	Calculated, see reference(s)
5	pH	pH		Weijers, Johan W H
6	Temperature, annual mean	MAT	°C	Weijers, Johan W H	see reference(s)

License:

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

Size:

484 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 MBT	4 CBT	5 pH	6 MAT [°C]
0.03	0.03	0.841	1.173	5.603	24.622
0.08	0.09	0.832	1.152	5.658	24.394
0.13	0.15	0.840	1.177	5.592	24.555
0.18	0.21	0.838	1.173	5.604	24.481
0.23	0.27	0.842	1.174	5.601	24.661
0.28	0.33	0.829	1.161	5.634	24.137
0.33	0.39	0.824	1.139	5.691	24.102
0.38	0.45	0.832	1.148	5.668	24.401
0.43	0.51	0.824	1.148	5.668	24.017
0.48	0.57	0.831	1.135	5.702	24.456
0.53	0.63	0.825	1.137	5.695	24.149
0.58	0.69	0.843	1.147	5.669	24.971
0.63	1.05	0.844	1.165	5.624	24.825
0.68	1.40	0.844	1.154	5.651	24.934
0.73	1.76	0.845	1.162	5.632	24.944
0.78	2.11	0.842	1.158	5.641	24.813
0.83	2.47	0.848	1.164	5.627	25.031
0.88	2.83	0.846	1.179	5.588	24.806
0.93	3.18	0.843	1.169	5.613	24.740
0.98	3.54	0.847	1.178	5.590	24.863
1.03	3.89	0.853	1.198	5.538	24.997
1.08	4.25	0.845	1.164	5.627	24.918
1.13	4.45	0.846	1.194	5.549	24.663
1.18	4.66	0.841	1.177	5.593	24.606
1.23	4.87	0.856	1.229	5.457	24.866
1.28	5.08	0.853	1.208	5.511	24.879
1.33	5.28	0.855	1.228	5.460	24.824
1.38	5.49	0.857	1.213	5.499	25.032
1.43	5.70	0.849	1.220	5.481	24.558
1.48	5.90	0.851	1.222	5.476	24.643
1.53	6.11	0.851	1.207	5.514	24.797
1.58	6.32	0.850	1.206	5.516	24.749
1.63	6.40	0.846	1.210	5.507	24.505
1.68	6.48	0.852	1.220	5.480	24.719
1.73	6.56	0.851	1.221	5.477	24.652
1.78	6.64	0.848	1.226	5.465	24.462
1.83	6.72	0.847	1.249	5.404	24.227
1.88	6.80	0.852	1.236	5.440	24.595
1.93	6.88	0.848	1.240	5.428	24.346
1.98	6.96	0.849	1.227	5.462	24.495
2.03	7.04	0.841	1.202	5.527	24.360
2.08	7.13	0.842	1.207	5.513	24.330
2.13	7.27	0.846	1.207	5.514	24.552
2.18	7.41	0.845	1.237	5.437	24.230
2.23	7.55	0.842	1.230	5.456	24.123
2.28	7.69	0.852	1.250	5.402	24.458
2.33	7.84	0.851	1.236	5.438	24.516
2.38	7.98	0.845	1.237	5.436	24.217
2.43	8.12	0.842	1.237	5.437	24.088
2.48	8.26	0.844	1.254	5.391	24.013
2.53	8.41	0.852	1.243	5.420	24.490
2.58	8.51	0.849	1.254	5.393	24.245
2.63	8.56	0.847	1.263	5.369	24.073
2.68	8.62	0.854	1.261	5.375	24.469
2.73	8.68	0.853	1.265	5.363	24.360
2.78	8.74	0.849	1.257	5.383	24.244
2.83	8.79	0.849	1.240	5.429	24.414
2.88	8.85	0.847	1.260	5.377	24.127
2.93	8.91	0.858	1.283	5.316	24.416
2.98	8.96	0.850	1.250	5.404	24.372
3.03	9.02	0.844	1.244	5.418	24.125
3.08	9.08	0.836	1.255	5.390	23.637
3.13	9.15	0.841	1.244	5.418	23.951
3.18	9.22	0.838	1.242	5.422	23.831
3.23	9.28	0.834	1.236	5.438	23.690
3.28	9.35	0.833	1.242	5.423	23.575
3.33	9.41	0.833	1.217	5.488	23.837
3.38	9.48	0.830	1.219	5.483	23.674
3.43	9.55	0.827	1.208	5.511	23.626
3.48	9.61	0.824	1.216	5.490	23.400
3.53	9.68	0.833	1.211	5.505	23.879
3.58	9.80	0.824	1.230	5.455	23.250
3.63	9.97	0.823	1.236	5.438	23.143
3.68	10.14	0.831	1.235	5.441	23.541
3.73	10.32	0.835	1.237	5.437	23.727
3.78	10.49	0.827	1.219	5.482	23.511
3.83	10.66	0.821	1.185	5.571	23.524
3.88	10.84	0.819	1.203	5.525	23.260
3.93	11.01	0.814	1.185	5.571	23.159
3.98	11.18	0.801	1.133	5.707	23.024
4.03	11.36	0.779	1.053	5.915	22.654
4.08	11.52	0.782	1.065	5.882	22.713
4.13	11.69	0.787	1.101	5.790	22.621
4.18	11.85	0.787	1.087	5.826	22.744
4.23	12.02	0.788	1.099	5.795	22.680
4.28	12.18	0.790	1.123	5.733	22.573
4.33	12.34	0.779	1.090	5.818	22.343
4.38	12.51	0.786	1.102	5.786	22.559
4.43	12.67	0.781	1.079	5.847	22.527
4.48	12.83	0.794	1.127	5.722	22.721
4.53	13.00	0.799	1.158	5.643	22.671
4.58	13.14	0.796	1.152	5.658	22.606
4.63	13.25	0.795	1.140	5.689	22.637
4.68	13.37	0.793	1.134	5.705	22.638
4.73	13.49	0.787	1.129	5.718	22.354
4.78	13.60	0.790	1.167	5.618	22.153
4.83	13.72	0.785	1.152	5.656	22.030
4.88	13.83	0.790	1.142	5.683	22.396
4.93	13.95	0.783	1.150	5.663	21.959
4.98	14.06	0.784	1.155	5.649	21.983
5.03	14.18	0.786	1.162	5.632	22.006
5.08	14.39	0.780	1.117	5.749	22.132
5.13	14.69	0.780	1.139	5.690	21.911
5.18	14.99	0.773	1.127	5.721	21.671
5.23	15.29	0.767	1.117	5.747	21.495
5.28	15.59	0.740	1.068	5.875	20.593
5.33	15.89	0.732	1.039	5.950	20.494
5.38	16.20	0.739	1.042	5.942	20.817
5.43	16.50	0.733	1.061	5.894	20.319
5.48	16.80	0.726	1.045	5.936	20.150
5.53	17.10	0.727	1.060	5.896	20.049
5.58	17.70	0.751	1.086	5.829	21.008
5.63	18.60	0.757	1.099	5.796	21.185
5.68	19.50	0.756	1.097	5.800	21.116
5.73	20.40	0.747	1.073	5.863	20.887
5.78	21.30	0.758	1.093	5.811	21.254
5.83	22.20	0.739	1.073	5.862	20.515
5.88	23.10	0.748	1.077	5.853	20.905
5.93	23.99	0.748	1.065	5.882	21.016
5.98	24.89	0.747	1.083	5.835	20.825
6.03	25.79	0.758	1.102	5.786	21.170