In continuation of the previous cruises (Sternfahrten) we covered a similar area with the RV Heincke. All instruments were set up in the MOSES laboratory container. Standard hydrographic parameters were determined with a pocket ferrybox running with ship's surface water supply. In addition, dissolved methane was determined continuously. We used a degassing unit which was using surface water from the ship's water supply. The gas mixture was subsequently analysed with a Greenhouse Gas Analyzer from LosGatos. Conversion to methane concentration was performed with water samples, from which the methane content was determined with gas chromatography. Atmospheric methane concentrations were obtained from the ICOS-station Helgoland. Wind speed was obtained from the ships meteorological systems. The diffusive flux was calculated as outlined in the additional meta data description.
As part of the MOSES Project, in April 2023 methane measurements were started in the north-western part of the island Heligoland in the German Bight (North Sea). The objective was to complement the measurements of the Sternfahrten to identify the carbon cycle and its flow from the start of the Elbe river into the North Sea. Therefore, a Contros methane sensor for dissolved methane was deployed under water at about 10 to 12 meter depth (depending on the tide) close to the underwater observatory (UW-OBS) MarGate (54°11' N, 7°52' E), from the COSYNA Project. To ensure correct values latter was cleaned frequently from growing organisms by scientific divers. The present data contains the data from 2024, the second year running the sensors. Based on the concentrations of dissolved methane the methane emissions (diffusive flux) was calculated.
In continuation of the previous cruises (Sternfahrten) we covered a similar area with the RVs Ludwig Prandtl and Mya II. All instruments were set up in the MOSES laboratory container. Standard hydrographic parameters were determined with a pocket ferrybox running with ship's surface water supply. In addition, dissolved methane was determined continuously. We used a degassing unit which was using surface water from the ship's water supply. The gas mixture was subsequently analysed with a Greenhouse Gas Analyzer from LosGatos. Conversion to methane concentration was performed with water samples, from which the methane content was determined with gas chromatography. Atmospheric methane concentrations were obtained from the ICOS-station Helgoland. Wind speed was obtained from the ships meteorological systems. The diffusive flux was calculated as outlined in the additional meta data description.
In January 2024 a river flood by the Elbe and Weser resulted in very high discharge of freshwater into the German Bight. To follow this river, plume the RV Mya II cruised from Sylt and between Helgoland, Cuxhaven, Büsum. All instruments were set up in the MOSES laboratory container. Standard hydrographic parameters were determined with a pocket ferrybox running with ship's surface water supply. In addition, dissolved methane was determined continuously. We used a degassing unit which was using surface water from the ship's water supply. The gas mixture was subsequently analysed with a Greenhouse Gas Analyzer from LosGatos. Conversion to methane concentration was performed with water samples, from which the methane content was determined with gas chromatography. Atmospheric methane concentrations were obtained from the ICOS-station Helgoland. Wind speed was obtained from the ships meteorological system. The diffusive flux was calculated as outlined in the additional meta data description.
Unbehandelt gelagerte Gülle verursacht hohe Methanemissionen, höher als beispielsweise Gärreste aus der anaeroben Güllevergärung . Obwohl verstärkt Anreize geschaffen wurden, Wirtschaftsdünger einer anaeroben Vergärung zuzuführen und über diesen Weg die Emissionen zu senken, ist die Vergärung von Gülle nicht für alle Standorte ökonomisch realisierbar. Die fehlende Wirtschaftlichkeit der vorhandenen Förderungen zeigt sich in dem sehr verhaltenen Zubau in der Klasse der kleinen Anlagen ('75 kW'). Daher sind kostengünstige alternative Lösungen zu entwickeln. Das im Vorhaben zu untersuchende Konzept beinhaltet eine Fassung der entstehenden Emissionen und eine Oxidation des enthaltenen Methans. Die geringen und saisonal stark schwankenden Volumenströme mit teilweise niedrigen Methankonzentrationen stehen einer wirtschaftlichen energetischen Nutzung entgegen. Aus anderen Branchen sind verschiedene Technologien bekannt, die für die Behandlung von schwach methanhaltigen Gasen geeignet sind. Eine Übertragung dieser Technologien auf die Nachbehandlung von Abgasen aus der Güllelagerung erfordert jedoch detaillierte Daten bezüglich Menge und Qualität der Abgase und vor allem zum zeitlichen Verlauf dieser Größen. Das hier beschriebene Vorhaben hat zum Ziel, Emissionen aus Güllelagern unter Praxisbedingungen über mindestens einen kompletten Jahreszyklus zu ermitteln und mögliche Technologien für die Nachbehandlung der Abgase hinsichtlich der Kosten, der energetischen Effizienz, der Leistungsfähigkeit, der Emissionsminderung und den vorhandenen Betriebserfahrungen zu bewerten. Aufbauend darauf soll die Funktionalität geeigneter Technologien praktisch (biologischer Methanoxidationsfilter) und in Form einer Simulation (RTO) demonstriert werden.
This dataset contains a compilation of the sulfur isotopic composition of pyrite from outcrop and sediment cores over the past 165 million years. The compilation includes 3754 data points from 94 publications, compiled in 2020, 2021, and 2023. The data was collected in order to investigate the relationship between the sulfur isotopic composition of pyrite and depositional environment over the Cenozoic and Late Mesozoic, and has global spatial coverage. Compiled sediment core data includes the sulfur isotopic composition of pyrite, age, water depth, location, methane content, lithology, and total organic carbon. Compiled outcrop data includes the sulfur isotopic composition of pyrite, age, generalized water depth based on sedimentological criteria, and lithology.
Water sampling was conducted during AL575 cruise in the North Sea by using Niskin Bottles attached to CTD/Water sampler rosette and ROV (Haeckel and Schmidt, 2024). To detect methane anomalies in the water column derived from seafloor gas emissions the recovered water samples were processed by using headspace gas sampling and subsequent gas chromatographic analysis. Based on measured methane concentrations of headspace gas in (micro-atm) the dissolved methane concentrations in water were calculated (nmol l-1).
As part of the MOSES Project, in April 2023 methane measurements were started in the north-western part of the island Heligoland in the German Bight (North Sea). The objective was to complement the measurements of the "Sternfahrten" to identify the carbon cycle and its flow from the start of the Elbe river into the North Sea. Therefore, a Contros methane sensor for dissolved methane was deployed under water at about 10 to 12 meter depth (depending on the tide) close to the underwater observatory (UW-OBS) MarGate (54°11' N, 7°52' E), from the COSYNA Project. To ensure correct values latter was cleaned frequently from growing organisms by scientific divers. The present data contains the data from 2023, the first year running the sensors. Based on the concentrations of dissolved methane the methane emissions (diffusive flux) was calculated.
The dataset is about temporal variability of dissolved methane along the freshwater-sea continuum in northern Germany. Sensors were installed at fixed stations at in total three sites at different water depths. This dataset is from the station in Heligoland (54.1833 N, 7.8667 E) at about 9-12m depth (depending on the tide). The data was obtained between 27 April and 28 October in high frequency measurements (1 min) with a methane sensor from Kongsberg (4H Jena model CONTROS HydroC CH4,). Methane concentrations were calculated according to manufacturer's instructions, based on temperature and salinity values from UW-node Heligoland (Fischer, Philipp; Happel, Lea; Brand, Markus; Eickelmann, Laura; Lienkämper, Miriam; Bussmann, Ingeborg; Anselm, Norbert; Brix, Holger (2022): Hydrographical time series data of Helgoland, Southern North Sea, 2021. PANGAEA, https://doi.org/10.1594/PANGAEA.950173). A gap in the salinity data was replaced with the median value of the observed time span (31.66). For the quality control of the data a local range of 0.1 – 1000 nmol/L was set, a technical range for the pump power 2 – 8. Watt, a spike and gradient value of 1. For a more detailed description see the article cited in References.
The southern North Sea (German Bight) is influenced by the inflowing water in the Tide-Elbe area and how it is further modified. For a better understanding of the different branches of relevant events it is necessary to investigate which are the main impacting factors for the terrestrial and coastal water quality. Therefore, during different cruises between 2019 and 2022 a group of parameters was continuously traced from the Elbe River basin (Czech/German border) to Tide-Elbe and Elbe estuary (Hamburg, Germany) until the German Bight. This dataset is about the cruise "Sternfahrt 5" from August 31 to September 03 in 2020, with the objective to detect the spatial extension of the riverine influence of Elbe and Weser. Therefore, three research vessels have been involved to cover a broad area of the German Bight between Hamburg, Heligoland and Sylt. All three research vessels (Littorina, Ludwig Prandtl and Mya II) started together on the first day from Cuxhaven to Heligoland. The first day and whenever two or three of the ships met, one measuring was made together as inter-calibration station (for more details, see file description), in total four. From the second day the ship Littorina travelled between Heligoland and Büsum, one track each day. The Ludwig Prandtl headed the second day towards Wyk auf Föhr. Afterwards the crew navigated further north towards Sylt and turning back to Wyk on the same day. The last day they went back from there to Cuxhaven meeting with the vessel Littorina for a last inter-calibration station. The vessel Mya II instead was navigating on the second and third day first to Bremerhaven and on a more western track back to Heligoland. To also cover the northern part of the research area, on the last day the crew travelled to Sylt, the home harbour of the vessel. Therefore, it was not participating on the last inter-calibration station off Cuxhaven. All ships took measurements of basic hydrographic parameters (salinity, temperature, oxygen saturation, pH) and atmospheric and dissolved greenhouse gases (methane and carbon dioxide). The parameters were measured continuously on the way by specific sensors submerged in a water reservoir on deck which was supplied with surface water (about 1m depth) from the underway water supply of the vessel. Methane and carbon dioxide were measured in the surface water and in the atmosphere with the sensors "LosGatos" and "Picarro". Ferrybox systems measured physical and chemical oceanographic parameters including salinity, temperature, pH. At specific stations along the tracks additionally vertical profiles were taken as well as water samples from the surface. The respective data can be found in: Bussmann, Ingeborg, Flöser, Götz, Geißler, Felix (2021): Carbon compounds, nutrients and pigments from water samples from MOSES project's cruise Sternfahrt 5. PANGAEA, https://doi.org/10.1594/PANGAEA.934894. Further profile data can be found in the AWI O2A-Database as download. Additional information about the whole campaign and different cruises can be found in the article(s) cited.
| Organisation | Count |
|---|---|
| Bund | 142 |
| Europa | 5 |
| Kommune | 2 |
| Land | 22 |
| Weitere | 1 |
| Wissenschaft | 105 |
| Zivilgesellschaft | 8 |
| Type | Count |
|---|---|
| Chemische Verbindung | 2 |
| Daten und Messstellen | 45 |
| Ereignis | 4 |
| Förderprogramm | 126 |
| Text | 6 |
| Umweltprüfung | 3 |
| unbekannt | 12 |
| License | Count |
|---|---|
| Geschlossen | 20 |
| Offen | 177 |
| Unbekannt | 1 |
| Language | Count |
|---|---|
| Deutsch | 141 |
| Englisch | 76 |
| Resource type | Count |
|---|---|
| Archiv | 6 |
| Bild | 1 |
| Datei | 44 |
| Dokument | 12 |
| Keine | 95 |
| Unbekannt | 1 |
| Webdienst | 2 |
| Webseite | 48 |
| Topic | Count |
|---|---|
| Boden | 198 |
| Lebewesen und Lebensräume | 198 |
| Luft | 198 |
| Mensch und Umwelt | 198 |
| Wasser | 198 |
| Weitere | 197 |