Citation:

PANGAEA.979684 (dataset in review)

Abstract:

In this publication, we investigated the spatial and temporal distribution of nutrients in the Elbe estuary, Northern Germany, in 2022. In seasonal transect cruises, physicochemical parameters were measured continuously along a transect from the North Sea (53.98°N 8.36°E) to the port of Oortkaten in the upstream Elbe River (53.46°N 10.06°E). The study focus was set on the interplay of eutrophication and in-stream nutrient regeneration. At ~40 stations along the estuary, we measured the concentration of dissolved nutrients (nitrate, nitrite, ammonium, phosphate, silicate) and nitrate dual stable isotope signatures (δ15N-NO3, δ18O-NO3) as well as characteristics of suspended particulate matter (δ15N-SPM, chlorophyll a concentration and C/N ratio).

Coverage:

Median Latitude: 53.692775 * Median Longitude: 9.452346 * South-bound Latitude: 53.398585 * West-bound Longitude: 8.350335 * North-bound Latitude: 53.983508 * East-bound Longitude: 10.299698

Date/Time Start: 2022-02-28T08:13:00 * Date/Time End: 2022-06-29T12:09:00

Minimum DEPTH, water: 2.0 m * Maximum DEPTH, water: 12.0 m

Event(s):

LP20220228_Stat_954 (954) * Latitude: 53.983508 * Longitude: 8.350335 * Date/Time: 2022-03-01T11:36:00 * Campaign: * Basis: * Method/Device: (FBOX)

LP20220228_Stat_955 (955) * Latitude: 53.976474 * Longitude: 8.424761 * Date/Time: 2022-03-01T12:20:00 * Campaign: * Basis: * Method/Device: (FBOX)

LP20220228_Stat_956 (956) * Latitude: 53.969846 * Longitude: 8.491104 * Date/Time: 2022-03-01T12:40:00 * Campaign: * Basis: * Method/Device: (FBOX)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Russnak, Vanessa
2	Sample code/label	Sample label		Russnak, Vanessa
3	International Generic Sample Number	IGSN		Russnak, Vanessa
4	Campaign of event	Campaign		Russnak, Vanessa
5	Optional event label	Event 2		Russnak, Vanessa
6	DEPTH, water	Depth water	m	Russnak, Vanessa		Geocode
7	Latitude of event	Latitude		Russnak, Vanessa
8	Longitude of event	Longitude		Russnak, Vanessa
9	Date/Time of event	Date/Time		Russnak, Vanessa
10	Method/Device of event	Method/Device		Russnak, Vanessa
11	Salinity	Sal		Russnak, Vanessa	FerryBox system, on-line-in-situ (Pertersen et al. 2001)	measured in water column
12	Quality flag, salinity	QF sal		Russnak, Vanessa
13	Temperature, water	Temp	°C	Russnak, Vanessa	FerryBox system, on-line-in-situ (Pertersen et al. 2001)	measured in water column
14	Quality flag, water temperature	QF water temp		Russnak, Vanessa
15	Turbidity (Nephelometric turbidity unit)	Turbidity	NTU	Russnak, Vanessa	FerryBox system, on-line-in-situ (Pertersen et al. 2001)	measured in water column
16	Quality flag, turbidity	QF turbidity		Russnak, Vanessa
17	Fluorescence	Fluorescence	arbitrary units	Russnak, Vanessa	FerryBox system, on-line-in-situ (Pertersen et al. 2001)	Fluorescence unit, measured in water column
18	Quality flag, fluorescence	QF fluoresc		Russnak, Vanessa
19	pH	pH		Russnak, Vanessa	FerryBox system, on-line-in-situ (Pertersen et al. 2001)	measured in water column
20	Quality flag, pH	QF pH		Russnak, Vanessa
21	Oxygen	O2	µmol/l	Russnak, Vanessa	FerryBox system, on-line-in-situ (Pertersen et al. 2001)	measured in water column
22	Quality flag, oxygen	QF O2		Russnak, Vanessa
23	Oxygen saturation	O2 sat	%	Russnak, Vanessa	FerryBox system, on-line-in-situ (Pertersen et al. 2001)	measured in water column
24	Quality flag, oxgen saturation	QF O2 sat		Russnak, Vanessa
25	Silicate, dissolved	DSi(OH)4	µmol/l	Russnak, Vanessa	Continuous flow analyser, Seal, AA3	measured in water column; Nutrient concentrations were analysed with a continuous flow analyser (AA3, Seal Analytics, Germany). For nitrite and nitrate analyses, standard photometric techniques were used (Grasshoff et al., 2009) with detection limits of 0.1 and 1.0 micromol per liter. Ammonium was measured fluorometrically with a detection limit of 0.5 micromol per liter based on (Holmes et al., 1999). Detection limits: nitrite (NO2) 0.1 micromol per liter, nitrate (NO3) 1.0 micromol per liter, amonnium (NH4) 0.5 micromol per liter. Average of the measurement of 2 replicates
26	Silicate, dissolved, standard deviation	DSi(OH)4 std dev	±	Russnak, Vanessa
27	Quality flag, silicate, dissolved	QF DSi(OH)4		Russnak, Vanessa
28	Phosphate	[PO4]3-	µmol/l	Russnak, Vanessa	Continuous flow analyser, Seal, AA3	measured in water column; Nutrient concentrations were analysed with a continuous flow analyser (AA3, Seal Analytics, Germany). For nitrite and nitrate analyses, standard photometric techniques were used (Grasshoff et al., 2009) with detection limits of 0.1 and 1.0 micromol per liter. Ammonium was measured fluorometrically with a detection limit of 0.5 micromol per liter based on (Holmes et al., 1999). Detection limits: nitrite (NO2) 0.1 micromol per liter, nitrate (NO3) 1.0 micromol per liter, amonnium (NH4) 0.5 micromol per liter. Average of the measurement of 2 replicates
29	Phosphate, standard deviation	[PO4]3- std dev	±	Russnak, Vanessa
30	Quality flag, phosphate	QF [PO4]3-		Russnak, Vanessa
31	Ammonium	[NH4]+	µmol/l	Russnak, Vanessa	Continuous flow analyser, Seal, AA3	measured in water column; Nutrient concentrations were analysed with a continuous flow analyser (AA3, Seal Analytics, Germany). For nitrite and nitrate analyses, standard photometric techniques were used (Grasshoff et al., 2009) with detection limits of 0.1 and 1.0 micromol per liter. Ammonium was measured fluorometrically with a detection limit of 0.5 micromol per liter based on (Holmes et al., 1999). Detection limits: nitrite (NO2) 0.1 micromol per liter, nitrate (NO3) 1.0 micromol per liter, amonnium (NH4) 0.5 micromol per liter. Average of the measurement of 2 replicates
32	Ammonium, standard deviation	[NH4]+ std dev	±	Russnak, Vanessa
33	Quality flag, ammonium	QF [NH4]+		Russnak, Vanessa
34	Nitrite	[NO2]-	µmol/l	Russnak, Vanessa	Continuous flow analyser, Seal, AA3	measured in water column; Nutrient concentrations were analysed with a continuous flow analyser (AA3, Seal Analytics, Germany). For nitrite and nitrate analyses, standard photometric techniques were used (Grasshoff et al., 2009) with detection limits of 0.1 and 1.0 micromol per liter. Ammonium was measured fluorometrically with a detection limit of 0.5 micromol per liter based on (Holmes et al., 1999). Detection limits: nitrite (NO2) 0.1 micromol per liter, nitrate (NO3) 1.0 micromol per liter, amonnium (NH4) 0.5 micromol per liter. Average of the measurement of 2 replicates
35	Nitrite, standard deviation	[NO2]- std dev	±	Russnak, Vanessa
36	Quality flag, nitrite	QF [NO2]-		Russnak, Vanessa
37	Nitrate	[NO3]-	µmol/l	Russnak, Vanessa	Continuous flow analyser, Seal, AA3	measured in water column; Nutrient concentrations were analysed with a continuous flow analyser (AA3, Seal Analytics, Germany). For nitrite and nitrate analyses, standard photometric techniques were used (Grasshoff et al., 2009) with detection limits of 0.1 and 1.0 micromol per liter. Ammonium was measured fluorometrically with a detection limit of 0.5 micromol per liter based on (Holmes et al., 1999). Detection limits: nitrite (NO2) 0.1 micromol per liter, nitrate (NO3) 1.0 micromol per liter, amonnium (NH4) 0.5 micromol per liter. Average of the measurement of 2 replicates
38	Nitrate, standard deviation	NO3 std dev	±	Russnak, Vanessa
39	Quality flag, nitrate	QF [NO3]-		Russnak, Vanessa
40	Nitrogen, inorganic, dissolved	DIN	µmol/l	Russnak, Vanessa	Continuous flow analyser, Seal, AA3	measured in water column; Nutrient concentrations were analysed with a continuous flow analyser (AA3, Seal Analytics, Germany). For nitrite and nitrate analyses, standard photometric techniques were used (Grasshoff et al., 2009) with detection limits of 0.1 and 1.0 micromol per liter. Ammonium was measured fluorometrically with a detection limit of 0.5 micromol per liter based on (Holmes et al., 1999). Detection limits: nitrite (NO2) 0.1 micromol per liter, nitrate (NO3) 1.0 micromol per liter, amonnium (NH4) 0.5 micromol per liter. Average of the measurement of 2 replicates
41	Quality flag, nitrogen, inorganic, dissolved	QF DIN		Russnak, Vanessa
42	δ15N, nitrate	δ15N NO3	‰ air	Russnak, Vanessa	Isotope-ratio mass spectrometry (IRMS)	measured in water column. Measurement as N2O using isotope-ratio mass spectrometry (IRMS). Bacterial conversion to N2O, so called Denitrifier-method (according to Sigman et al. 2001; Casciotti et al. 2002). Average of the measurement of 2 replicates.
43	δ15N, nitrate, standard deviation	δ15N NO3 std dev	±	Russnak, Vanessa
44	Quality flag, δ15N, nitrate	QF δ15N NO3		Russnak, Vanessa
45	δ18O, nitrate	δ18O NO3	‰	Russnak, Vanessa	Isotope-ratio mass spectrometry (IRMS)	measured in water column. Measurement as N2O using isotope-ratio mass spectrometry (IRMS). Bacterial conversion to N2O, so called Denitrifier-method (according to Sigman et al. 2001; Casciotti et al. 2002). Average of the measurement of 2 replicates.
46	δ18O, nitrate, standard deviation	δ18O NO3 std dev	±	Russnak, Vanessa
47	Quality flag, δ18O, nitrate	QF δ18O NO3		Russnak, Vanessa
48	Chlorophyll a	Chl a	µg/l	Russnak, Vanessa	Spectrophotometer Hach DR6000 UV VIS	measured in water column, S.W. Jeffrey, G.F. Humphrey, New spectrophotometric equations for determining chlorophylls a, b, c1 and c2 in higher plants, algae and natural phytoplankton, Biochemie und Physiologie der Pflanzen, Volume 167, Issue 2, 1975, Pages 191-194, ISSN 0015-3796, https:
49	Quality flag, chlorophyll a	QF chl a		Russnak, Vanessa
50	Suspended particulate matter	SPM	mg/l	Russnak, Vanessa	Seston GF/F filter (GF/F)	measured in suspended particulate matter; In most cases, a water sample volume was pumped on board and filled into 1 L glass water bottles. The samples were filtered through Whatman GF/C glass fibre filters within minutes of sampling. In the lab, filters were dried and weighed. The weight, divided by the sampling volume, yields the suspended matter concentration. The filters were combusted at 500¡C and weighed again in order to get the inorganic part. From this, the Loss on Ignition was derived
51	Quality flag, suspended particulate matter	QF SPM		Russnak, Vanessa
52	Carbon/Nitrogen ratio	C/N		Russnak, Vanessa	Elemental analyzer, HEKAtechGmbH, Euro EA	molar ratio of the percentage; measured in suspended particulate matter; C/N ratios were determined with an Elemental Analyser (Euro EA, Hekatech) calibrated against a certified acetanilide standard (IVA Analysentechnik, Germany). The standard deviation of C/N analysis was 0.05% for carbon and 0.005% for nitrogen.
53	Quality flag, carbon/nitrogen ratio	QF C/N		Russnak, Vanessa
54	δ15N	δ15N	‰ air	Russnak, Vanessa	Carbon and hydrogen and nitrogen and sulfur and oxygen (CHNSO) isotope elemental analyzer, Elementar, Vario ISOTOPE cube; coupled with Isotope ratio mass spectrometer (IRMS), IsoPrime, IsoPrime100	measured in suspended particulate matter, permille versus air nitrogen; d15N-SPM was analysed with an element analyser (CHNOS Vario Isotope, Elementar) coupled with an isotope ratio mass spectrometer (Isoprime 100, Elementar). All samples were analysed in replicate. Standards for d15N-SPM are IAEA N1, IAEA N2, and a certified sediment standard (IVA Analysentechnik, Germany). Standard deviation of standards and samples was <0.1 permille
55	Quality flag, δ15N	QF δ15N		Russnak, Vanessa

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:

7119 data points

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