Citation:

PANGAEA.995159 (dataset in review)

Name: Surface measurements of nutrients in the East Frisian Wadden Sea from 2019 to 2022
License: https://creativecommons.org/licenses/by/4.0/
Keywords: nutrients; plankton; Wadden Sea

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Abstract:

Phytoplankton biomass is increasing in the Wadden Sea since 2005, while nutrients concentrations are declining since 1995. A survey started in 2006 by the Lower Saxony Water Management, Coastal and Nature Protection Agency regularly monitors nutrient levels, including silicates, nitrate, and phosphate, and temperature and salinity in the East Frisian Wadden Sea. A total of 17 stations are sampled from a monthly to weekly frequency. Samples are taken at the surface with a bucket, and kept in 5L canisters with Lugol's iodine solution to be stored in the cold and dark until analysis. The analysis of samples followed the procedures for seawater analysis given by Grasshoff et al. 1983. Dissolved nutrients, such as orthophosphate, nitrate, nitrite and silicate, were measured photometrically. Total nitrogen and phosphorus concentration were estimated by digesting total nutrients using heat and pressure, or in microwave with peroxodisulfate. The pH, salinity, and temperature were measured using a multisensor. The data provides a detailed time series of physical and chemical properties in the East Frisian Wadden Sea surface waters from 2019 to 2022.

Keyword(s):

nutrients; plankton; Wadden Sea

Supplement to:

Rönn, Lena; Wirtz, Kai W; Imbert, Thomas (in review): High relevance of top-down control in coastal planktonic food webs. Frontiers in Marine Science. In review. Frontiers in Marine Science

Coverage:

Median Latitude: 53.747926 * Median Longitude: 7.904796 * South-bound Latitude: 53.479015 * West-bound Longitude: 6.874542 * North-bound Latitude: 54.049294 * East-bound Longitude: 8.471297

Date/Time Start: 2019-01-03T07:19:00 * Date/Time End: 2022-12-28T12:55:00

Minimum DEPTH, water: 1 m * Maximum DEPTH, water: 1 m

Event(s):

Auwe_W_1 * Latitude: 53.873417 * Longitude: 8.115734 * Date/Time Start: 2012-07-30T00:00:00 * Date/Time End: 2024-12-31T00:00:00 * Location: East Frisian Wadden Sea, Germany * Method/Device: Monitoring station (MONS)

Auwe_W_2 * Latitude: 53.846753 * Longitude: 8.059077 * Date/Time Start: 1986-08-26T00:00:00 * Date/Time End: 2024-12-31T00:00:00 * Location: East Frisian Wadden Sea, Germany * Method/Device: Monitoring station (MONS)

Balt_W_1 * Latitude: 53.731765 * Longitude: 7.440842 * Date/Time Start: 2012-07-30T00:00:00 * Date/Time End: 2024-12-31T00:00:00 * Location: East Frisian Wadden Sea, Germany * Method/Device: Monitoring station (MONS)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Rönn, Lena
2	Sample code/label	Sample label		Rönn, Lena
3	Latitude of event	Latitude		Rönn, Lena
4	Longitude of event	Longitude		Rönn, Lena
5	Location of event	Location		Rönn, Lena
6	DATE/TIME	Date/Time		Rönn, Lena		Geocode
7	DEPTH, water	Depth water	m	Rönn, Lena		Geocode
8	Sample method	Sample method		Rönn, Lena
9	Salinity	Sal		Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)	PSU
10	pH	pH		Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
11	Temperature, water	Temp	°C	Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
12	Phosphate	[PO4]3-	µmol/l	Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
13	Nitrate	[NO3]-	µmol/l	Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
14	Phosphorus, total	TP	µmol/l	Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
15	Nitrogen, total	TN	µmol/l	Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
16	Silicate	Si(OH)4	µmol/l	Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
17	Suspended particulate matter	SPM	mg/l	Rönn, Lena	Seawater analysis after Grasshoff et al. (1983)
18	Depth of Secchi Disk	z(SD)	m	Rönn, Lena	Secchi disk (SD)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

7981 data points

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