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Hydrochemistry time series at List Entrance Koenigshafen, Sylt, Germany, in 2020

The Sylt Roads pelagic time series covers physical and hydrochemical parameters in the Sylt–Rømø bight, Wadden Sea, North Sea. Sea surface temperature (SST), salinity, pH, ammonium, nitrite, nitrate, dissolved (in)organic nitrogen (DIN, DON), silicate, soluble reactive phosphorus (SRP), dissolved organic phosphorus (DOP), chlorophyll a and suspended matter concentrations (SPM) are measured twice a week. These parameters are used to identify long-term changes in the Northern Wadden Sea.

Hydrochemistry time series at List Ferry Terminal, Sylt, Germany, in 2021

The Sylt Roads pelagic time series covers physical and hydrochemical parameters in the Sylt–Rømø bight, Wadden Sea, North Sea. Sea surface temperature (SST), salinity, pH, ammonium, nitrite, nitrate, dissolved (in)organic nitrogen (DIN, DON), silicate, soluble reactive phosphorus (SRP), dissolved organic phosphorus (DOP), chlorophyll a and suspended matter concentrations (SPM) are measured twice a week. These parameters are used to identify long-term changes in the Northern Wadden Sea.

Fließgewässer – Nährstoffe und Salze (Datensatz)

Der Datensatz enthält die statistischen Kennzahlen (z.B. Mittelwert, Perzentile, Maximum) für etwa 250 Messstellen in Fließ- und Übergangsgewässern (LAWA Messstellennetz) sowie Angaben zu den Messstellen. Die Daten sind Grundlage für die Auswertungen der Applikation „Fließgewässer - Nährstoffe und Salze“ (siehe auf der rechten Seite unter "Download-Links").

Water chemistry of Lagrangian samplings of Inland Elbe 2024 (MOSES Hydrological Extremes)

Within the framework of MOSES (Modular Observation Solutions for Earth Systems) and ElbeXtreme, we performed three longitudinal sampling campaigns in the Elbe catchment in 2024. The campaigns covered the German freshwater part, the tidal Elbe river, and the German Bight. Here we present the results of the freshwater river where the sampling was conducted in a Langrangian way according to flow velocity. Physico-chemical and biological parameters were measured along the Elbe from bridges between Bad Schandau (km 12, Czech-German border) and Lauenburg (km 570, close to Hamburg). A particular scientific focus was on (1) nutrients and eutrophication, (2) composition of dissolved organic matter measured by high-resolution mass spectrometry, (3) greenhouse gas measurements, and (4) micropollutants. This was done during a winter flood event in January, a summer drought in July, and a second smaller flood in September 2024.

Soil physicochemical properties of the plot DPFL_14 (Pfeiffhausen, Germany) in 2016, 2020 and 2022

As part of PhytOakmeter platform (www.phytoakmeter.de), soil chemical parameters were determined in 2016, 2020 and 2022. Soil pH was measured using a glass electrode in a 1:2.5 soil-to-0.01 M CaCl2 suspension after one hour of equilibration. Gravimetric soil moisture was assessed with a fully automated moisture analyzer (DBS60-3, KERN & SOHN GmbH, Balingen, Germany), here defined as soil moisture (MOI). Total nitrogen (TN) and total carbon (TC) contents in the soil were analyzed in triplicate through dry combustion using a Vario elemental analyzer (EL III, Elementar, Hanau, Germany), and the carbon-to-nitrogen ratio (TC/TN) was subsequently calculated from these values. To evaluate the potentially bioavailable soil organic carbon and nitrogen for microbial activity, hot water-extractable carbon and nitrogen (HWC and HWN, respectively) were determined following the methods of Ghani et al. (2003) and Schulz et al. (2011). Additionally, the labile organic carbon and nitrogen easily decomposable by soil microorganisms were measured as cold water-extractable carbon (CWC) and nitrogen (CWN) based on procedures described by Zsolnay (1996), Zakharova et al. (2015), and Schmidt et al. (2017). Ammonium and nitrate (NH4±N and NO3—N, respectively) were quantified, with their sum representing the total mineral nitrogen content (Nmin).

Hydrochemistry time series at List Entrance Koenigshafen, Sylt, Germany, in 2021

The Sylt Roads pelagic time series covers physical and hydrochemical parameters in the Sylt–Rømø bight, Wadden Sea, North Sea. Sea surface temperature (SST), salinity, pH, ammonium, nitrite, nitrate, dissolved (in)organic nitrogen (DIN, DON), silicate, soluble reactive phosphorus (SRP), dissolved organic phosphorus (DOP), chlorophyll a and suspended matter concentrations (SPM) are measured twice a week. These parameters are used to identify long-term changes in the Northern Wadden Sea.

Hydrochemistry time series at List Reede, Sylt, Germany, in 2021

The Sylt Roads pelagic time series covers physical and hydrochemical parameters in the Sylt–Rømø bight, Wadden Sea, North Sea. Sea surface temperature (SST), salinity, pH, ammonium, nitrite, nitrate, dissolved (in)organic nitrogen (DIN, DON), silicate, soluble reactive phosphorus (SRP), dissolved organic phosphorus (DOP), chlorophyll a and suspended matter concentrations (SPM) are measured twice a week. These parameters are used to identify long-term changes in the Northern Wadden Sea.

Hydrochemistry time series at List Reede, Sylt, Germany, in 2020

The Sylt Roads pelagic time series covers physical and hydrochemical parameters in the Sylt–Rømø bight, Wadden Sea, North Sea. Sea surface temperature (SST), salinity, pH, ammonium, nitrite, nitrate, dissolved (in)organic nitrogen (DIN, DON), silicate, soluble reactive phosphorus (SRP), dissolved organic phosphorus (DOP), chlorophyll a and suspended matter concentrations (SPM) are measured twice a week. These parameters are used to identify long-term changes in the Northern Wadden Sea.

Hydrochemistry time series at List Ferry Terminal, Sylt, Germany, in 2020

The Sylt Roads pelagic time series covers physical and hydrochemical parameters in the Sylt–Rømø bight, Wadden Sea, North Sea. Sea surface temperature (SST), salinity, pH, ammonium, nitrite, nitrate, dissolved (in)organic nitrogen (DIN, DON), silicate, soluble reactive phosphorus (SRP), dissolved organic phosphorus (DOP), chlorophyll a and suspended matter concentrations (SPM) are measured twice a week. These parameters are used to identify long-term changes in the Northern Wadden Sea.

Distribution and concentration of nutrients, carbon compounds and methane in water samples in the southern German Bight (North Sea) in November 2025, during the MOSES Sternfahrt 12

Previous Sternfahrten were mainly conducted in spring and summer. To cover the seasonal aspects more thoroughly, including a winter situation, this cruise was conducted in late autumn (20 -22 November 2025 ). We used the RV Heincke (cruise HE673/2) instead of the RV Uthörn. The Heincke's draught is greater, so we could not reach all of our previous stations. Surface and bottom water samples were taken with a rosette.

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