Citation:

PANGAEA.987363 (DOI registration in progress)

Name: Porewater geochemistry of sediment core AL561_28-1
Published: 2025-11-24
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; MUC; North Sea; porewater; Porewater chemistry

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Published: 2025-11-24

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Abstract:

The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.

Keyword(s):

Geochemistry; MUC; North Sea; porewater; Porewater chemistry

Related to:

Spiegel, Timo; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Moros, Matthias; Lindhorst, Sebastian; Wolschke, Hendrik; Müller, Daniel; Butzin, Martin; Fuhr, Michael; Kalapurakkal, Habeeb Thanveer; Kasten, Sabine; Wallmann, Klaus (2025): Mass accumulation rates decreased in the Skagerrak basin over the last 100 years. Continental Shelf Research, 286, 105411, https://doi.org/10.1016/j.csr.2025.105411

Spiegel, Timo; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Sommer, Stefan; Becker, Kevin W; Elling, Felix J; Porz, Lucas; Daewel, Ute; Fuhr, Michael; Kalapurakkal, Habeeb Thanveer; Wallmann, Klaus (2025): Benthic POC cycling in the Skagerrak basin: The role of lateral POC input. Continental Shelf Research, 293, 105536, https://doi.org/10.1016/j.csr.2025.105536

Spiegel, Timo; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Sommer, Stefan; Kalapurakkal, Habeeb Thanveer; Przibilla, Anna; Lindhorst, Sebastian; Wallmann, Klaus (2023): Biogenic silica cycling in the Skagerrak. Frontiers in Marine Science, 10, 1141448, https://doi.org/10.3389/fmars.2023.1141448

Spiegel, Timo; Diesing, Markus; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Sommer, Stefan; Böttner, Christoph; Fuhr, Michael; Kalapurakkal, Habeeb Thanveer; Schulze, Cosima; Wallmann, Klaus (2024): Modelling mass accumulation rates and 210Pb rain rates in the Skagerrak: lateral sediment transport dominates the sediment input. Frontiers in Marine Science, 11, 1331102, https://doi.org/10.3389/fmars.2024.1331102

Project(s):

Anthropogenic impacts on particulate organic carbon cycling in the North Sea (APOC)

Coverage:

Latitude: 57.987890 * Longitude: 9.239350

Date/Time Start: 2021-08-09T11:35:53 * Date/Time End: 2021-08-09T11:35:53

Minimum DEPTH, sediment/rock: 0.070 m * Maximum DEPTH, sediment/rock: 2.900 m

Event(s):

AL561_28-1 (ALK561_28GC7) * Latitude: 57.987890 * Longitude: 9.239350 * Date/Time: 2021-08-09T11:35:53 * Elevation: -490.0 m * Location: Skagerrak * Campaign: * Basis: * Method/Device: Gravity corer (GC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Dale, Andy W
2	DEPTH, sediment/rock	Depth sed	m	Dale, Andy W		Geocode
3	Replicate	Repl		Dale, Andy W
4	Alkalinity, total	AT	mmol(eq)/l	Dale, Andy W	Titration, Pavlova
5	Barium	Ba	nmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
6	Boron	B	mmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
7	Bromide	Br-	µmol/l	Dale, Andy W	Ion chromatography
8	Calcium	Ca	mmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
9	Chloride	Cl-	mmol/l	Dale, Andy W	Ion chromatography	Cl/IAPSO
10	Chloride	Cl-	mmol/l	Dale, Andy W	Ion chromatography
11	Iron	Fe	µmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
12	Potassium	K	mmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
13	Lithium	Li	µmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
14	Magnesium	Mg	mmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
15	Manganese	Mn	µmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
16	Sodium	Na	mmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
17	Ammonium	[NH4]+	µmol/l	Dale, Andy W	Photometry
18	Phosphate	[PO4]3-	µmol/l	Dale, Andy W	Photometry
19	Silicon	Si	mmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)
20	Silicate	Si(OH)4	µmol/l	Dale, Andy W	Photometry
21	Sulfate	[SO4]2-	mmol/l	Dale, Andy W	Ion chromatography
22	Strontium	Sr	µmol/l	Dale, Andy W	Inductively coupled plasma atomic emission spectroscope (ICP-AES)

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

542 data points

Data

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

1 Type	2 Depth sed [m]	3 Repl	4 AT [mmol(eq)/l] (Titration, Pavlova)	5 Ba [nmol/l] (Inductively coupled plasma at...)	6 B [mmol/l] (Inductively coupled plasma at...)	7 Br- [µmol/l] (Ion chromatography)	8 Ca [mmol/l] (Inductively coupled plasma at...)	9 Cl- [mmol/l] (Cl/IAPSO, Ion chromatography)	10 Cl- [mmol/l] (Ion chromatography)	11 Fe [µmol/l] (Inductively coupled plasma at...)	12 K [mmol/l] (Inductively coupled plasma at...)	13 Li [µmol/l] (Inductively coupled plasma at...)	14 Mg [mmol/l] (Inductively coupled plasma at...)	15 Mn [µmol/l] (Inductively coupled plasma at...)	16 Na [mmol/l] (Inductively coupled plasma at...)	17 [NH4]+ [µmol/l] (Photometry)	18 [PO4]3- [µmol/l] (Photometry)	19 Si [mmol/l] (Inductively coupled plasma at...)	20 Si(OH)4 [µmol/l] (Photometry)	21 [SO4]2- [mmol/l] (Ion chromatography)	22 Sr [µmol/l] (Inductively coupled plasma at...)
Porewater	0.070	Rh	4.51	172.67	0.50	853.90	10.31	566.4	560.17	87.36	11.32	26.02	52.74	41.41	481.64	232.60	35.02	0.33	324.80	27.35	87.71
Porewater	0.100	Rh	6.29	184.42	0.49	838.80	9.99	566.4	570.61	89.35	11.11	25.54	52.07	42.74	479.55	418.60	59.25	0.44	443.70	26.35	85.90
Porewater	0.200	Rh	9.25	193.87	0.49	819.27	9.55	566.4	566.30	83.34	10.73	24.53	51.41	41.31	476.71	620.00	101.75	0.48	486.30	24.11	84.02
Porewater	0.300	Rh	10.65	221.78	0.51	843.63	9.39	566.4	570.54	57.27	11.18	24.84	51.55	30.27	477.74	945.50	118.30	0.53	544.00	23.50	84.50
Porewater	0.400	Rh	10.96	226.10	0.51	862.07	9.45	566.4	570.69	19.33	11.18	24.88	52.03	23.83	480.13	977.90	111.10	0.57	577.50	23.59	85.25
Porewater	0.500	Rh	11.27	232.45	0.51		9.24			11.60	11.13	24.63	51.28	18.99	481.98	1112.00	105.60	0.58	590.00		83.11
Porewater	0.600	Rh	11.89	230.41	0.51	913.19	9.18	566.4	572.42	11.64	11.11	24.53	51.72	15.73	478.72	1088.00	112.90	0.59	609.00	22.88	83.70
Porewater	0.700	Rh	12.20	237.81	0.51	850.70	8.98	566.4	571.42	4.88	11.04	24.31	51.26	13.33	476.69	1213.00	106.05	0.60	616.50	22.31	82.65
Porewater	0.800	Rh	13.60	256.51	0.52	915.34	8.80	566.4	564.66	5.25	11.04	24.33	51.91	11.86	479.79	1248.00	116.75	0.60	620.50	20.65	82.57
Porewater	0.900	Rh	15.23	264.95	0.51	801.04	8.15	566.4	568.70	2.11	10.74	23.72	50.54	10.22	476.61	1543.00	124.95	0.61	624.00	18.71	78.82
Porewater	0.950	Rh	16.40	277.60	0.53	823.35	8.13	566.4	556.02	2.62	10.92	23.84	51.22	9.81	479.18	1564.00	128.00	0.62	647.00	18.00	79.76
Porewater	1.050	Rh	17.10	297.77	0.54	844.88	7.49	566.4	557.08	1.59	10.84	23.17	48.88	7.93	479.05	1684.00	126.30	0.62	646.50	16.23	75.46
Porewater	1.150	Rh	19.35	314.17	0.54	904.19	7.50	566.4	566.73	3.54	10.83	23.74	50.72	7.12	477.82	1872.00	132.40	0.63	647.50	16.24	76.94
Porewater	1.250	Rh	19.20	337.01	0.54	848.31	7.49	566.4	563.59	5.04	11.02	23.92	50.99	6.91	477.08	1909.00	128.70	0.62	645.50	16.37	77.25
Porewater	1.350	Rh	20.21	364.94	0.54	878.17	7.21	566.4	558.97	5.30	10.99	23.70	50.90	6.76	477.14	2037.00	131.15	0.61	634.50	15.19	75.88
Porewater	1.450	Rh	25.49	452.16	0.56	943.23	6.02	566.4	570.93	4.70	10.70	22.77	49.68	6.47	471.67	2294.00	171.10	0.65	686.50	10.96	69.73
Porewater	1.550	Rh	28.44	527.37	0.58	935.69	5.34	566.4	570.88	8.57	10.74	22.30	49.65	6.09	472.24	2414.00	188.45	0.66	697.50	8.40	66.94
Porewater	1.650	Rh	29.14	624.78	0.57	912.44	4.56	566.4	559.63	13.30	10.22	20.70	46.30	5.33	467.61	2681.00	189.10	0.66	659.00	5.99	60.92
Porewater	1.750	Rh	32.41	828.34	0.59	848.85	4.18	566.4	542.07	7.13	10.53	20.75	48.60	4.60	472.12	2882.00	211.90	0.65	682.50	3.85	61.21
Porewater	1.850	Rh	36.22	1171.40	0.61	882.57	3.77	566.4	569.57	5.77	10.49	20.13	48.72	3.73	469.23	3104.00	220.70	0.65	683.50	2.53	59.08
Porewater	1.950	Rh	36.68	1657.25	0.62	907.54	3.49	566.4	574.89	12.77	10.64	19.87	49.45	3.27	476.24	3370.00	224.85	0.64	662.00	1.53	58.77
Porewater	2.100	Rh	38.00	3421.36	0.62	910.44	3.03	566.4	564.91	3.19	10.24	18.37	48.33	2.70	469.31	3290.00	222.50	0.63	657.50	0.46	55.60
Porewater	2.300	Rh	40.41	5116.08	0.66	922.30	2.74	566.4	551.25	23.96	10.39	18.32	49.87	3.51	470.02	3854.00	212.20	0.55	578.00	0.46	54.23
Porewater	2.500	Rh	41.81	4533.08	0.69	967.94	2.52	566.4	572.05	56.71	10.44	18.69	50.48	3.89	471.03	4202.00	205.10	0.55	568.00	0.37	53.39
Porewater	2.700	Rh	43.91	4209.30	0.71	940.57	2.35	566.4	567.46	75.61	10.51	19.03	50.47	4.45	471.10	4504.00	186.40	0.55	566.50	0.07	51.19
Porewater	2.900	Rh	43.91	4460.60	0.72	964.94	2.34	566.4	566.20	63.34	11.00	19.85	50.80	4.52	471.06	4560.00	138.95	0.51	530.00	0.93	50.38