Citation:

PANGAEA.956054

Name: Dissolved barium and silicon isotopes at the Congo River-dominated Southeast Atlantic margin from METEOR cruise M121 (GEOTRACES cruise GA08)
Published: 2023-02-27
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Angola Basin; Barium isotopes; Congo River Plume; Silicon isotopes

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

To better understand the association between barium (Ba) and silicon (Si) at ocean margins, we collected filtered seawater samples along the Congo River plume at the coast of Congo and Gabon and along an off-shelf section at 3°S, complemented by three freshwater samples collected directly from the Congo River. The water samples from the Congo margin were collected during GEOTRACES cruise GA08 with German RV Meteor (M121) in November-December 2015 with a stainless steel CTD rosette and a towed fish for surface waters. Congo River freshwater samples were taken upstream by boat in May, July and October 2017 near the center of the river at ~6°S and ~12.5°E (stations 12.1-12.3). We determine for the first time Ba and Si stable isotopes at the Congo River-dominated Southeast Atlantic margin. Based on these data we evaluate the contribution of Congo River plume to Ba and Si budgets in the South East Atlantic Ocean, and the association between Ba and Si at the Congo margin.

Keyword(s):

Angola Basin; Barium isotopes; Congo River Plume; Silicon isotopes

Supplement to:

Zhang, Zhouling; Yu, Yang; Hathorne, Ed C; Vieira, Lucia Helena; Grasse, Patricia; Siebert, Christopher; Rahlf, Peer; Frank, Martin (2023): Decoupling of Barium and Silicon at the Congo River‐Dominated Southeast Atlantic Margin: Insights From Combined Barium and Silicon Isotopes. Global Biogeochemical Cycles, 37(5), e2022GB007610, https://doi.org/10.1029/2022GB007610

Project(s):

Global marine biogeochemical cycles of trace elements and their isotopes (GEOTRACES)

Coverage:

Median Latitude: -3.947683 * Median Longitude: 7.724024 * South-bound Latitude: -7.320000 * West-bound Longitude: -0.010000 * North-bound Latitude: -3.000000 * East-bound Longitude: 12.490000

Date/Time Start: 2015-11-29T00:00:00 * Date/Time End: 2017-10-08T00:00:00

Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 4485 m

Event(s):

Congo_River_12-1 * Latitude: -6.070000 * Longitude: 12.490000 * Date/Time: 2017-07-22T00:00:00 * Method/Device: Sampling river (RIVER)

Congo_River_12-2 * Latitude: -6.070000 * Longitude: 12.490000 * Date/Time: 2017-10-08T00:00:00 * Method/Device: Sampling river (RIVER)

Congo_River_12-3 * Latitude: -6.070000 * Longitude: 12.490000 * Date/Time: 2017-05-04T00:00:00 * Method/Device: Sampling river (RIVER)

Comment:

Dissolved barium (Ba) concentration and its stable isotopes, dissolved silicon (Si) concentration and its stable isotopes, and calculated Ba* values based on global, South Atlantic or regional (this study area) Si-Ba correlations. Ba* is defined as the deviation of dissolved Ba concentration from the Ba-Si linear relationship.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Zhang, Zhouling
2	Sample code/label	Sample label		Zhang, Zhouling
3	Station label	Station		Zhang, Zhouling
4	Type	Type		Zhang, Zhouling	CTD Type
5	DEPTH, water	Depth water	m	Zhang, Zhouling	Geocode
6	LATITUDE	Latitude		Zhang, Zhouling	Geocode
7	LONGITUDE	Longitude		Zhang, Zhouling	Geocode
8	Temperature, water	Temp	°C	Zhang, Zhouling
9	Salinity	Sal		Zhang, Zhouling
10	Barium	Ba	nmol/l	Zhang, Zhouling	dissolved
11	δ138Ba	δ138Ba	‰	Zhang, Zhouling
12	Standard deviation	Std dev	±	Zhang, Zhouling	2SD
13	Replicates	Repl	#	Zhang, Zhouling
14	Silicon	Si	µmol/l	Zhang, Zhouling	dissolved
15	δ30Si	δ30Si	‰ NBS	Zhang, Zhouling
16	Standard deviation	Std dev	±	Zhang, Zhouling	2SD
17	δ29Si	δ29Si	‰ NBS	Zhang, Zhouling
18	Standard deviation	Std dev	±	Zhang, Zhouling	2SD
19	Replicates	Repl	#	Zhang, Zhouling
20	Barium, dissolved, anomaly	Ba*		Zhang, Zhouling	Horner et al., 2015
21	Barium, dissolved, anomaly	Ba*		Zhang, Zhouling	Bates et al., 2017
22	Barium, dissolved, anomaly	Ba*		Zhang, Zhouling	this study area

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1252 data points

Data

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

1 Event	2 Sample label	3 Station	4 Type (CTD Type)	5 Depth water [m]	6 Latitude	7 Longitude	8 Temp [°C]	9 Sal	10 Ba [nmol/l] (dissolved)	11 δ138Ba [‰]	12 Std dev [±] (2SD)	13 Repl [#]	14 Si [µmol/l] (dissolved)	15 δ30Si [‰ NBS]	16 Std dev [±] (2SD)	17 δ29Si [‰ NBS]	18 Std dev [±] (2SD)	19 Repl [#]	20 Ba* (Horner et al., 2015)	21 Ba* (Bates et al., 2017)	22 Ba* (this study area)
Congo_River_12-1	Congo River	12.1		0	-6.07	12.49		0.00	123.0	0.00	0.03	7	169.400	1.32	0.12	0.66	0.06	5	-9	-22	-20
Congo_River_12-2	Congo River	12.2		0	-6.07	12.49		0.00	136.4	0.05	0.03	8	177.700	1.04	0.11	0.59	0.08	5	0	-14	-12
Congo_River_12-3	Congo River	12.3		0	-6.07	12.49		0.00	129.0	0.09	0.05	8	158.900	1.22	0.05	0.65	0.13	7	2	-10	-8
M121_1200-1	M121_1200-1	12	FISH	0	-7.28	12.17	27.72	35.15	40.5	0.61	0.03	4	1.100	3.05	0.09	1.57	0.09	7	-4	1	-3
M121_1201-1		12	SS	282	-7.32	12.18	11.46	35.11	42.5	0.60	0.01	5	14.500	1.69	0.10	0.85	0.14	6	-9	-5	-9
M121_1202-1	M121_1202-1	13	FISH	0	-6.20	11.99	26.30	28.55	75.5	0.29	0.05	7	42.900	1.04	0.09	0.55	0.09	8	9	10	7
M121_1202-1	M121_1202-1	13	SS	39	-6.20	11.99	22.21	35.56	41.1	0.62	0.02	4	2.300	2.24	0.08	1.08	0.10	3	-4	1	-3
M121_1202-1_fish65	Fish65	13.1	FISH	0	-6.22	11.51	27.40	35.13	41.0	0.58	0.05	3	1.500	2.70	0.23	1.30	0.17	7	-4	1	-3
M121_1206-1	M121_1206-1	14	FISH	0	-6.24	11.23	27.65	35.21	41.9	0.61	0.03	4	1.400	2.79	0.24	1.42	0.14	4	-3	2	-2
M121_1206-1	M121_1206-1	14	SS	498	-6.23	11.16	7.93	34.71	49.1	0.54	0.02	4	19.800	1.71	0.08	0.87	0.13	5	-5	-2	-5
M121_1206-1	M121_1206-1	14	SS	989	-6.23	11.16	4.56	34.57	62.9	0.49	0.04	4	32.700	1.54	0.09	0.83	0.07	5	2	4	1
M121_1210-1	M121_1210-1	15	FISH	0	-6.00	11.49	27.04	31.54	61.7	0.35	0.03	3	26.300	1.10	0.16	0.59	0.13	9	4	6	3
M121_1212-1	M121_1212-1	15	SS	197	-6.00	11.49	13.89	35.40	39.7	0.62	0.01	5	10.100	1.70	0.13	0.96	0.14	5	-9	-5	-9
M121_1210-1	M121_1210-1	15	SS	346	-6.00	11.49	9.55	35.61	45.7	0.58	0.02	3	16.900	1.71	0.21	0.93	0.07	5	-7	-4	-7
M121_1210-1_fish69-15.1	Fish69	15.1	FISH	0	-5.97	11.54	27.03	23.45	92.2	0.19	0.05	8	67.000	1.30	0.10	0.71	0.11	5	13	11	10
M121_1210-1_fish69-15.2	Fish69	15.2	FISH	0	-5.75	11.89	26.64	24.37	92.7	0.16	0.01	7	63.200	1.24	0.12	0.66	0.12	6	16	14	13
M121_1210-1_fish69-15.3	Fish69	15.3	FISH	0	-5.78	11.65	27.05	24.34	92.6	0.20	0.06	8	64.000	1.13	0.20	0.61	0.13	6	15	14	12
M121_1214-1	M121_1214-1	16	FISH	0	-4.27	10.48	25.33	34.58	49.5	0.52	0.01	5	10.500	1.83	0.12	0.95	0.14	8	0	4	1
M121_1214-1	M121_1214-1	16	SS	298	-4.27	10.48	10.10	35.47	43.9	0.61	0.03	6	14.900						-8	-4	-8
M121_1214-1	M121_1214-1	16	SS	881	-4.27	10.48	4.64	34.59	62.5	0.49	0.02	4	31.100	1.49	0.15	0.80	0.10	5	2	4	1
M121_1214-1_fish77	Fish77	16.1	FISH	0	-3.60	10.14	26.67	33.18	51.7	0.48	0.02	4	9.500	1.95	0.13	0.99	0.17	4	3	7	3
M121_1218-1	M121_1218-1	17	FISH	0	-3.10	9.88	26.76	33.55	50.7	0.51	0.05	7	7.000	1.95	0.15	0.98	0.12	7	3	8	4
M121_1218-1	M121_1218-1	17	SS	29	-3.00	9.83	23.73	35.56	40.7	0.63	0.03	4	2.400	1.90	0.20	1.01	0.08	4	-4	1	-3
M121_1218-1	M121_1218-1	17	SS	52	-3.00	9.83	18.72	35.76	41.3	0.61	0.04	4	6.800						-6	-2	-5
M121_1222-1	M121_1222-1	18	FISH	0	-3.00	9.48	27.04	34.11	48.6	0.47	0.01	4	7.200						1	5	2
M121_1224-1	M121_1224-1	18	SS	43	-3.00	9.43	20.91	35.60	40.7	0.59	0.03	5	3.300						-5	0	-4
M121_1222-1	M121_1222-1	18	SS	98	-3.00	9.43	17.27	35.83	40.4	0.60	0.04	6	5.200	1.95	0.18	1.01	0.32	3	-6	-2	-5
M121_1222-1	M121_1222-1	18	SS	149	-3.00	9.43	15.53	35.61	40.6	0.61	0.03	3	7.000	1.95	0.10	1.01	0.11	4	-7	-2	-6
M121_1222-1	M121_1222-1	18	SS	174	-3.00	9.43	15.27	35.58	40.7	0.59	0.01	3	7.200	1.89	0.11	1.02	0.05	3	-7	-2	-6
M121_1226-1	M121_1226-1	19	FISH	0	-3.00	9.39	26.87	33.82	48.8	0.46	0.05	5	7.700	1.85	0.14	0.94	0.16	7	1	5	2
M121_1228-1	M121_1228-1	19	SS	43	-3.00	9.33	21.06	35.76	40.1	0.62	0.05	5	2.800						-5	0	-4
M121_1228-1	M121_1228-1	19	SS	98	-3.00	9.33	17.37	35.85	40.2	0.61	0.03	4	4.300	1.86	0.06	0.96	0.14	4	-6	-1	-5
M121_1226-1	M121_1226-1	19	SS	195	-3.00	9.33	14.49	35.48	40.9	0.62	0.02	4	8.800	1.79	0.14	0.95	0.12	5	-8	-3	-7
M121_1226-1	M121_1226-1	19	SS	494	-3.00	9.33	8.12	34.73	49.5	0.54	0.02	4	18.800						-4	-1	-4
M121_1230-1	M121_1230-1	20	FISH	0	-3.00	9.08	26.80	33.77	48.2	0.53	0.04	3	5.900	2.02	0.06	1.02	0.10	4	1	6	2
M121_1232-1	M121_1232-1	20	SS	97	-3.00	9.07	17.03	35.81	40.2	0.60	0.02	4	4.800						-6	-2	-5
M121_1232-1	M121_1232-1	20	SS	200	-3.00	9.07	14.52	35.48	39.3	0.62	0.03	4	8.600	1.72	0.10	0.96	0.07	4	-9	-5	-8
M121_1230-1	M121_1230-1	20	SS	488	-3.00	9.07	7.88	34.70	49.4	0.55	0.01	5	19.300	1.60	0.21	0.89	0.10	6	-5	-1	-5
M121_1230-1	M121_1230-1	20	SS	1011	-3.00	9.07	4.55	34.62	62.8	0.47	0.05	4	30.800	1.45	0.05	0.81	0.10	4	3	5	2
M121_1234-1	M121_1234-1	21	FISH	0	-3.00	7.08	27.47	35.00	40.6	0.60	0.03	3	2.100	1.78	0.05	0.87	0.06	9	-4	1	-3
M121_1236-1	M121_1236-1	21	SS	100	-3.00	6.78	16.57	35.75	40.3	0.59	0.03	3	5.900	1.78	0.06	0.96	0.21	4	-7	-2	-6
M121_1236-1	M121_1236-1	21	SS	401	-3.00	6.78	8.93	34.81	43.7	0.55	0.01	3	14.800	1.72	0.21	0.90	0.15	6	-8	-4	-8
M121_1234-1	M121_1234-1	21	SS	706	-3.00	6.78	5.05	34.48	59.9	0.43	0.06	3	28.200	1.63	0.14	0.84	0.09	5	1	4	1
M121_1234-1	M121_1234-1	21	SS	1248	-3.00	6.78	4.43	34.83	58.7	0.43	0.04	4	24.200	1.49	0.11	0.82	0.07	5	2	5	2
M121_1234-1	M121_1234-1	21	SS	1995	-3.00	6.78	3.55	34.95	60.6	0.41	0.04	4	23.300	1.58	0.16	0.74	0.09	5	5	7	4
M121_1234-1	M121_1234-1	21	SS	2996	-3.00	6.78	2.65	34.90	77.2	0.36	0.04	4	40.800	1.37	0.12	0.76	0.04	5	12	13	10
M121_1234-1	M121_1234-1	21	SS	3996	-3.00	6.78	2.32	34.87	89.3	0.36	0.03	4	53.083	1.47	0.13	0.76	0.07	3	18	17	15
M121_1234-1	M121_1234-1	21	SS	4146	-3.00	6.78	2.33	34.87	93.8	0.34	0.02	3	57.400						20	19	17
M121_1238-1	M121_1238-1	22	FISH	0	-3.00	4.53	27.54	34.60	42.2	0.55	0.01	3	2.800	2.09	0.15	1.06	0.13	7	-3	2	-2
M121_1240-1	M121_1240-1	22	SS	99	-3.00	4.42	15.44	35.62	39.4				5.500						-7	-3	-6
M121_1240-1	M121_1240-1	22	SS	395	-3.00	4.42	8.69	34.78	47.7				16.800						-5	-2	-5
M121_1238-1	M121_1238-1	22	SS	795	-3.00	4.42	4.82	34.50	59.5				30.200						0	2	-1
M121_1238-1	M121_1238-1	22	SS	1246	-3.00	4.42	4.37	34.82	60.6				25.400						4	6	3
M121_1238-1	M121_1238-1	22	SS	1995	-3.00	4.42	3.53	34.95	59.5				23.400						3	6	3
M121_1238-1	M121_1238-1	22	SS	2995	-3.00	4.42	2.65	34.90	77.9				40.700						13	14	11
M121_1238-1	M121_1238-1	22	SS	3996	-3.00	4.42	2.34	34.88	86.4				49.200						17	17	15
M121_1238-1	M121_1238-1	22	SS	4485	-3.00	4.42	2.31	34.87	88.1				50.800						18	17	15
M121_1243-1	M121_1243-1	23	FISH	0	-3.00	2.33	26.23	35.81	38.9	0.61	0.06	4	1.500	2.94	0.22	1.47	0.13	7	-6	-1	-5
M121_1243-1	M121_1243-1	23	SS	3998	-3.00	2.21	2.34	34.88	85.0				50.800						15	14	12
M121_1247-1	M121_1247-1	24	SS	4445	-3.00	-0.01	2.23	34.86	83.8				50.900						13	13	11
M121_1247-1	M121_1247-1	24	SS	4417	-3.00	-0.01	2.23	34.86	85.2				51.300						15	14	12
M121_1247-1	M121_1247-1	24	SS	4364	-3.00	-0.01	2.25	34.86	85.8				50.100						16	16	13
M121_1248-1	M121_1248-1	24	SS	4001	-3.00	-0.01	2.37	34.88	81.5				46.900						13	13	11
M121_1248-1	M121_1248-1	24	SS	2996	-3.00	-0.01	2.66	34.90	77.1				40.000						12	13	11
M121_1248-1	M121_1248-1	24	SS	1999	-3.00	-0.01	3.48	34.95	60.7				23.400						5	7	4
M121_1248-1	M121_1248-1	24	SS	1247	-3.00	-0.01	4.36	34.82	59.8				25.000						3	5	2
M121_1248-1	M121_1248-1	24	SS	759	-3.00	-0.01	5.02	34.50	60.8				29.000						2	4	1
M121_1250-1	M121_1250-1	24	SS	397	-3.00	-0.01	9.32	34.84	46.4				15.200						-5	-2	-5
M121_1250-1	M121_1250-1	24	SS	99	-3.00	-0.01	15.64	35.65	38.7				5.800						-8	-4	-7
M121_1248-1	M121_1248-1	24	FISH	0	-3.00	0.12	26.65	35.64	38.4	0.61	0.02	3	0.900	3.07	0.16	1.58	0.19	6	-6	-1	-5
M121_Fish65	Fish65	Fish65	FISH	0	-6.21	11.65		35.12	41.0	0.60	0.03	3	0.700						-3	2	-2
M121_Fish67	Fish67	Fish67	FISH	0	-6.07	11.24		35.21	40.7	0.60	0.04	4	0.500						-3	2	-2
M121_Fish68	Fish68	Fish68	FISH	0	-6.02	11.39		28.87	74.7	0.26	0.03	3	39.000	1.01	0.20	0.57	0.10	6	10	11	9
M121_Fish69	Fish69	Fish69	FISH	0	-5.90	11.66		23.22	94.0	0.23	0.06	3	64.100	1.02	0.07	0.54	0.09	5	17	15	13
M121_Fish71	Fish71	Fish71	FISH	0	-5.78	11.85		24.11	93.8	0.22	0.05	3	59.100	1.23	0.12	0.74	0.11	3	19	18	16
M121_Fish74	Fish74	Fish74	FISH	0	-5.69	11.42		21.83	101.8	0.17	0.01	4	70.500	1.04	0.19	0.50	0.26	5	21	19	17
M121_Fish76	Fish76	Fish76	FISH	0	-3.90	10.29		32.55	53.0	0.42	0.06	7	10.900						3	7	4
M121_Fish77	Fish77	Fish77	FISH	0				32.48	51.0	0.48	0.05	7	8.800	1.78	0.07	0.93	0.17	3	3	7	3
M121_Fish83	Fish83	Fish83	FISH	0	-3.00	8.46		33.59	45.6	0.49	0.06	4	5.100	1.93	0.16	0.98	0.09	3	-1	4	0
M121_Fish84	Fish84	Fish84	FISH	0	-3.00	8.22		33.74	46.4	0.53	0.03	4	4.700	1.75	0.10	0.91	0.12	4	0	5	1
M121_Fish85	Fish85	Fish85	FISH	0	-3.00	7.51		35.18	42.3	0.60	0.02	3	0.900						-2	3	-1
M121_Fish86	Fish86	Fish86	FISH	0	-3.00	7.07		34.99	41.6	0.59	0.02	3	1.600						-3	2	-2
M121_Fish90	Fish90	Fish90	FISH	0	-3.00	6.04		35.01	41.5	0.59	0.05	3	1.600						-3	2	-2