Citation:

2010GC003344

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Abstract:

The ocean plays a major role in the global carbon cycle, and attempts to reconstruct past changes in the marine carbonate system are increasing. The speciation of dissolved uranium is sensitive to variations in carbonate system parameters, and previous studies have shown that this is recorded in the uranium-to-calcium ratio (U/Ca) of the calcite shells of planktonic foraminifera. Here we test whether U/Ca ratios of deep-sea benthic foraminifera are equally suited as an indicator of the carbonate system. We compare U/Ca in two common benthic foraminifer species (Planulina wuellerstorfi and Cibicidoides mundulus) from South Atlantic core top samples with the calcite saturation state (Delta [CO3**2-] = [CO3**2-]in situ - [CO3**2-]sat) of the ambient seawater and find significant negative correlations for both species. Compared with planktonic foraminifera, the sensitivity of U/Ca in benthic foraminifera to changes in Delta [CO3**2-] is about 1 order of magnitude higher. Although Delta [CO3**2-] exerts the dominant control on the average foraminiferal U/Ca, the intertest and intratest variability indicates the presence of additional factors forcing U/Ca.

Project(s):

Center for Marine Environmental Sciences (MARUM)

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: -29.611049 * Median Longitude: -24.916945 * South-bound Latitude: -48.013333 * West-bound Longitude: -58.518200 * North-bound Latitude: -1.665000 * East-bound Longitude: 13.828333

Date/Time Start: 1988-03-12T00:00:00 * Date/Time End: 2000-01-31T08:10:00

Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.005 m

Event(s):

GeoB1041-1 * Latitude: -3.480000 * Longitude: -7.591667 * Date/Time: 1988-03-12T00:00:00 * Elevation: -4035.0 m * Penetration: 0.42 m * Location: Walvis Ridge * Campaign: * Basis: * Method/Device: Giant box corer (GKG) * Comment: Karb.-schl., Forams

GeoB1105-3 * Latitude: -1.665000 * Longitude: -12.428330 * Date/Time: 1989-02-25T00:00:00 * Elevation: -3231.0 m * Penetration: 0.36 m * Recovery: 0.32 m * Location: Equatorial Atlantic * Campaign: * Basis: * Method/Device: Giant box corer (GKG) * Comment: Karbonatschlamm

GeoB1118-2 * Latitude: -3.560000 * Longitude: -16.431660 * Date/Time: 1989-03-06T00:00:00 * Elevation: -4675.0 m * Penetration: 0.48 m * Recovery: 0.47 m * Location: Brazil Basin * Campaign: * Basis: * Method/Device: Giant box corer (GKG) * Comment: Karbonatschlamm, Foram.

Comment:

standard deviation=standard error of the mean.Partition coefficient DU = (U/Cashell)/(U/Caseawater) using a U/Caseawater = 1390 nmol/mol [Ku et al., 1977].*Outlier not used in regressions.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Elevation of event	Elevation	m
5	DEPTH, sediment/rock	Depth sed	m			Geocode
6	Depth, top/min	Depth top	m	Raitzsch, Markus
7	Depth, bottom/max	Depth bot	m	Raitzsch, Markus
8	Carbonate ion	[CO3]2-	µmol/kg	Raitzsch, Markus
9	Δ carbonate ion content	Δ[CO3]2-	µmol/kg	Raitzsch, Markus	Calculated from WOCE, using the equation of Jansen et al. 2002
10	Planulina wuellerstorfi, Uranium/Calcium ratio	P. wuellerstorfi U/Ca	nmol/mol	Raitzsch, Markus	see reference(s)
11	Planulina wuellerstorfi, Uranium/Calcium ratio, standard deviation	P. wuellerstorfi U/Ca std dev	±	Raitzsch, Markus
12	Planulina wuellerstorfi, partition coefficient	P. wuellerstorf DU		Raitzsch, Markus	see comment
13	Planulina wuellerstorfi, Manganese/Calcium ratio	P. wuellerstorfi Mn/Ca	µmol/mol	Raitzsch, Markus	see reference(s)
14	Planulina wuellerstorfi, Manganese/Calcium ratio, standard deviation	P. wuellerstorfi Mn/Ca std dev	±	Raitzsch, Markus
15	Planulina wuellerstorfi, Aluminium/Calcium ratio	P. wuellerstorfi Al/Ca	µmol/mol	Raitzsch, Markus	see reference(s)
16	Planulina wuellerstorfi, Aluminium/Calcium ratio, standard deviation	P. wuellerstorfi Al/Ca std dev	±	Raitzsch, Markus
17	Cibicidoides mundulus, Uranium/Calcium ratio	C. mundulus U/Ca	nmol/mol	Raitzsch, Markus	see reference(s)
18	Cibicidoides mundulus, Uranium/Calcium ratio, standard deviation	C. mundulus U/Ca std dev	±	Raitzsch, Markus
19	Cibicidoides mundulus, partition coefficient	C. mundulus DU		Raitzsch, Markus	see comment
20	Cibicidoides mundulus, Manganese/Calcium ratio	C. mundulus Mn/Ca	µmol/mol	Raitzsch, Markus	see reference(s)
21	Cibicidoides mundulus, Manganese/Calcium ratio, standard deviation	C. mundulus Mn/Ca std dev	±	Raitzsch, Markus
22	Cibicidoides mundulus, Aluminium/Calcium ratio	C. mundulus Al/Ca	µmol/mol	Raitzsch, Markus	see reference(s)
23	Cibicidoides mundulus, Aluminium/Calcium ratio, standard deviation	C. mundulus Al/Ca std dev	±	Raitzsch, Markus

License:

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

Size:

337 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Depth sed [m]	7 Depth bot [m]	8 [CO3]2- [µmol/kg]	9 Δ[CO3]2- [µmol/kg]	10 P. wuellerstorfi U/Ca [nmol/mol]	11 P. wuellerstorfi U/Ca std dev [±]	12 P. wuellerstorf DU	13 P. wuellerstorfi Mn/Ca [µmol/mol]	14 P. wuellerstorfi Mn/Ca std dev [±]	15 P. wuellerstorfi Al/Ca [µmol/mol]	16 P. wuellerstorfi Al/Ca std dev [±]	17 C. mundulus U/Ca [nmol/mol]	18 C. mundulus U/Ca std dev [±]	19 C. mundulus DU	20 C. mundulus Mn/Ca [µmol/mol]	21 C. mundulus Mn/Ca std dev [±]	22 C. mundulus Al/Ca [µmol/mol]	23 C. mundulus Al/Ca std dev [±]
GeoB1041-1	-3.4800	-7.5917	-4035	0.005	0.01	106.67	14.29	8.88	0.46	0.0064	4.31	0.55	13.62	5.44
GeoB1105-3	-1.6650	-12.4283	-3231	0.005	0.01	109.90	30.54	8.66	0.75	0.0062	6.24	0.53	4.94	2.71
GeoB1118-2	-3.5600	-16.4317	-4675	0.005	0.01	89.41	-14.85	22.93	1.12	0.0165	3.43	0.96	4.86	2.10	16.89	1.73	0.0122	7.94	3.79	24.18	9.85
GeoB1710-2	-23.4300	11.7033	-2987	0.005	0.01	103.04	27.26	10.68	0.90	0.0077	4.64	0.60	5.31	1.31	11.55	2.15	0.0083	9.41	2.48	3.35	2.47
GeoB1715-3	-26.4700	11.6383	-4095	0.005	0.01	96.40	2.97	14.75	1.33	0.0106	25.73	10.13	66.20	24.75
GeoB1720-4	-29.0000	13.8283	-2011	0.005	0.01	101.08	38.07	6.05	0.81	0.0044	6.42	1.81	16.97	9.42
GeoB1721-5	-29.1733	13.0900	-3045	0.005	0.01	101.22	24.61	10.80	0.84	0.0078	25.25	11.74	40.98	16.02
GeoB1728-3	-29.8383	2.4067	-2887	0.005	0.01	102.51	28.15	4.71	0.28	0.0034	1.27	0.72	6.19	0.82	4.48	0.44	0.0032	2.98	1.13	11.70	3.54
GeoB1729-2	-28.8917	1.0017	-4401	0.005	0.01	104.17	5.18	10.48	0.62	0.0075	21.51	6.87	73.82	20.90	8.82	0.82	0.0063	1.60	0.31	5.98	1.22
GeoB2102-1	-23.9833	-41.2000	-1805	0.005	0.01	93.72	33.11	5.58	2.05	0.0040	30.65	6.56	102.80	25.97	3.38	0.55	0.0024	0.91	0.17	8.81	8.81
GeoB2718-2	-47.3067	-58.1733	-2991	0.005	0.01	89.49	13.66	13.48	2.88	0.0097	38.89	11.57	19.34	7.20	14.51	1.72	0.0104	2.07	0.33	6.39	2.42
GeoB2727-1	-48.0133	-56.5383	-2803	0.005	0.01	86.92	13.51	6.59	0.94	0.0047	4.94	1.20	17.54	16.42
GeoB3803-1	-30.3483	-8.5717	-4173	0.005	0.01	105.39	10.57	7.32	0.72	0.0053	18.38	13.68	2.66	0.32	9.65	1.34	0.0069	1.00	0.25	8.94	4.53
GeoB3804-2	-30.7433	-8.7700	-3882	0.005	0.01	106.36	16.62	10.29	1.00	0.0074	23.16	10.78	17.18	7.08	6.21	0.66	0.0045	9.79	4.24	6.13	1.27
GeoB3807-1	-30.7500	-13.1983	-2515	0.005	0.01	103.33	34.02	4.66	0.42	0.0034	4.21	2.14	10.05	4.27
GeoB3808-7	-30.8117	-14.7100	-3213	0.005	0.01	106.94	27.86	7.59	0.81	0.0055	2.44	0.80	0.48	0.18	4.74	0.31	0.0034	1.43	0.22	3.89	0.64
GeoB3822-1	-27.6267	-37.9500	-4273	0.005	0.01	86.62	-10.01	7.23	*0.68	0.0052	3.61	0.98	17.61	7.95	20.86	3.26	0.0150	3.69	0.39	43.45	11.22
GeoB3827-1	-25.0317	-38.5483	-3842	0.005	0.01	100.87	11.80	11.43	2.20	0.0082	2.72	0.65	12.35	3.61	15.68	1.33	0.0113	6.15	1.93	40.77	13.41
GeoB6208-1	-31.8080	-45.6647	-3693	0.005	0.01	84.98	-1.62	13.44	1.55	0.0097	2.60	1.08	24.18	18.57
GeoB6222-2	-34.0815	-48.6155	-3450	0.005	0.01	90.87	8.16	19.92	1.99	0.0143	0.34	0.57	43.03	23.50
GeoB6330-1	-46.1450	-57.5567	-3874	0.005	0.01	85.67	-3.94	18.11	1.55	0.0130	5.47	1.04	0.51	0.71
GeoB6334-2	-46.0872	-58.5182	-2597	0.005	0.01	90.65	20.26	13.96	1.90	0.0100	4.87	1.38	7.84	4.93	6.78	1.15	0.0049	1.68	0.38	1.58	3.17
GeoB6336-2	-46.1417	-57.8450	-3398	0.005	0.01	85.21	3.31	9.50	0.93	0.0068	12.73	0.99	19.65	12.81