Citation:

PANGAEA.996292 (DOI registration in progress)

Name: Submarine groundwater discharge in front of a coastal peatland: Seepage rates and hydrochemistry
Published: 2026-09-08
License: https://creativecommons.org/licenses/by/4.0/

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Published: 2026-09-08

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Abstract:

Coastal peatlands are important carbon, nutrient, and trace metal stores, which might be mobilized and released to the adjacent sea upon rewetting. The objectives of this study were to quantify submarine groundwater discharge (SGD) in front of a rewetted coastal peatland at the southern Baltic Sea coast, to estimate associated fluxes of solutes, and to characterize the discharged water using stable oxygen, hydrogen, and carbon isotope composition. We directly measured SGD rates and collected the discharging water using seepage meters in summer and autumn 2021. SGD, seawater and groundwater were analyzed for major ion, nutrient, DOC/DIC and trace metal concentrations as well as the composition of water and carbon isotopes. Racasa et al. (2026) is based on this dataset.

Related to:

Racasa, Erwin Don; Jenner, Anna-Kathrina; Saban, Rhodelyn C; Kienzler, Jakob; Batistel, Cheryl; Choo, Simeon; Wang, Miaorun; Gräwe, Ulf; Böttcher, Michael Ernst; Janssen, Manon (2026): Characterization of Submarine Groundwater Discharge in Front of a Rewetted Coastal Peatland. Estuaries and Coasts, 49(1), 12, https://doi.org/10.1007/s12237-025-01607-z

Further details:

README file for detailed method description used in Racasa et al. (2026)

Funding:

German Research Foundation (DFG), grant/award no. 240942083 : DFG Research Training Group Baltic TRANSCOAST

Coverage:

Median Latitude: 54.220578 * Median Longitude: 12.162128 * South-bound Latitude: 54.215981 * West-bound Longitude: 12.116276 * North-bound Latitude: 54.226027 * East-bound Longitude: 12.172704

Date/Time Start: 2021-06-30T09:20:00 * Date/Time End: 2021-09-15T11:15:00

Event(s):

Baltic_Sea_coast_1_GW (1_GW) * Latitude: 54.225733 * Longitude: 12.172704 * Date/Time Start: 2021-07-01T11:20:00 * Date/Time End: 2021-07-02T11:47:00 * Location: Coastal Baltic Sea, Germany * Method/Device: Seepage meter

Baltic_Sea_coast_1_SM1 (1_SM1) * Latitude: 54.225996 * Longitude: 12.172071 * Date/Time Start: 2021-06-30T09:23:00 * Date/Time End: 2021-07-01T13:16:00 * Location: Coastal Baltic Sea, Germany * Method/Device: Seepage meter

Baltic_Sea_coast_1_SM2 (1_SM2) * Latitude: 54.226027 * Longitude: 12.172116 * Date/Time Start: 2021-06-30T09:30:00 * Date/Time End: 2021-07-02T11:12:00 * Location: Coastal Baltic Sea, Germany * Method/Device: Seepage meter

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Racasa, Erwin Don
2	Optional event label	Event 2		Racasa, Erwin Don
3	Latitude of event	Latitude		Racasa, Erwin Don
4	Longitude of event	Longitude		Racasa, Erwin Don
5	Date/Time of event	Date/Time		Racasa, Erwin Don
6	Date/Time of event 2	Date/Time 2		Racasa, Erwin Don
7	Type of study	Study type		Racasa, Erwin Don
8	Sample type	Samp type		Racasa, Erwin Don
9	Area/locality	Area		Racasa, Erwin Don
10	Location	Location		Racasa, Erwin Don
11	Seepage bag, volume change	Seepage bag vol change	ml	Racasa, Erwin Don	see README file	Filled
12	Seepage rate	Seepage rate	cm/day	Racasa, Erwin Don	see README file	Filled
13	Seepage bag, volume change	Seepage bag vol change	ml	Racasa, Erwin Don	see README file	Empty
14	Seepage rate	Seepage rate	cm/day	Racasa, Erwin Don	see README file	Empty
15	Oxygen, dissolved	DO	mg/l	Racasa, Erwin Don	see README file
16	Dissolved oxygen saturation	DO sat	%	Racasa, Erwin Don	see README file
17	Temperature, water	Temp	°C	Racasa, Erwin Don	see README file
18	Conductivity	Cond	mS/cm	Racasa, Erwin Don	see README file
19	Salinity	Sal		Racasa, Erwin Don	see README file	PSU
20	Total dissolved solids	TDS	ng/kg	Racasa, Erwin Don	see README file
21	pH	pH		Racasa, Erwin Don	see README file
22	Oxidation reduction (RedOx) potential	Eh	mV	Racasa, Erwin Don	see README file
23	Chloride	Cl-	mg/l	Racasa, Erwin Don	see README file
24	Chloride	Cl-	mmol/l	Racasa, Erwin Don	see README file
25	Nitrite	[NO2]-	mg/l	Racasa, Erwin Don	see README file
26	Bromide	Br-	mg/l	Racasa, Erwin Don	see README file
27	Bromide	Br-	mmol/l	Racasa, Erwin Don	see README file
28	Nitrate	[NO3]-	mg/l	Racasa, Erwin Don	see README file
29	Sulfate	[SO4]2-	mg/l	Racasa, Erwin Don	see README file
30	Sulfate	[SO4]2-	mmol/l	Racasa, Erwin Don	see README file
31	Sodium	Na+	mg/l	Racasa, Erwin Don	see README file
32	Sodium	Na	mmol/l	Racasa, Erwin Don	see README file
33	Potassium	K+	mg/l	Racasa, Erwin Don	see README file
34	Potassium	K	mmol/l	Racasa, Erwin Don	see README file
35	Calcium	Ca	mg/l	Racasa, Erwin Don	see README file
36	Calcium	Ca	mmol/l	Racasa, Erwin Don	see README file
37	Magnesium	Mg	mg/l	Racasa, Erwin Don	see README file
38	Magnesium	Mg	mmol/l	Racasa, Erwin Don	see README file
39	Carbon, organic, dissolved	DOC	mg/l	Racasa, Erwin Don	see README file
40	Carbon, organic, dissolved	DOC	mmol/l	Racasa, Erwin Don	see README file
41	Carbon, inorganic, dissolved	DIC	mg/l	Racasa, Erwin Don	see README file
42	Carbon, inorganic, dissolved	DIC	mmol/l	Racasa, Erwin Don	see README file
43	Nitrogen, total dissolved	TDN	mg/l	Racasa, Erwin Don	see README file
44	Nitrogen, total dissolved	TDN	µmol/l	Racasa, Erwin Don	see README file
45	Phosphate	[PO4]3-	mg/l	Racasa, Erwin Don	see README file
46	Phosphate	[PO4]3-	µmol/l	Racasa, Erwin Don	see README file
47	Ammonium	[NH4]+	mg/l	Racasa, Erwin Don	see README file
48	Ammonium	[NH4]+	µmol/l	Racasa, Erwin Don	see README file
49	Iron	Fe	µg/l	Jenner, Anna-Kathrina	see README file
50	Iron	Fe	µmol/l	Jenner, Anna-Kathrina	see README file
51	Manganese	Mn	µg/l	Jenner, Anna-Kathrina	see README file
52	Manganese	Mn	µmol/l	Jenner, Anna-Kathrina	see README file
53	Barium	Ba	µg/l	Jenner, Anna-Kathrina	see README file
54	Barium	Ba	µmol/l	Jenner, Anna-Kathrina	see README file
55	Lithium	Li	µg/l	Jenner, Anna-Kathrina	see README file
56	Lithium	Li	µmol/l	Jenner, Anna-Kathrina	see README file
57	Strontium	Sr	µg/l	Jenner, Anna-Kathrina	see README file
58	Strontium	Sr	µmol/l	Jenner, Anna-Kathrina	see README file
59	Silicon	Si	µg/l	Jenner, Anna-Kathrina	see README file
60	Silicon	Si	µmol/l	Jenner, Anna-Kathrina	see README file
61	δ13C, dissolved inorganic carbon	δ13C DIC	‰ PDB	Jenner, Anna-Kathrina	see README file
62	Carbon, inorganic, dissolved	DIC	mmol/l	Jenner, Anna-Kathrina	see README file
63	δ18O, water	δ18O H2O	‰ SMOW	Jenner, Anna-Kathrina	see README file
64	δ Deuterium, water	δD H2O	‰ SMOW	Jenner, Anna-Kathrina	see README file

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2186 data points

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