| Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
|---|---|---|---|---|
| Ludwig Prandtl | LP210726 | 26.07.2021 - 30.07.2021 | North Sea Elbe river basin |
| Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
|---|---|---|---|---|---|
| Schulz Gesa | Helmholtz-Zentrum Hereon GmbH | Oortkaten | Cuxhaven |
Ziel der Reise / Objectives of Cruise:
Due to the input of high nutient loads and phytoplankton biomass from the Elbe river, the tidal Elbe and in particular the Port of Hamburg exhibit complex nutrient turnover processes. These processes reach their maximum in the area of the Port of Hamburg. This makes the area a hotspot for the production of the greenhouse gas nitrous oxide. The aim of the cruise was to record, quantify and budget the nitrogen turnover processes and nitrous oxide production in the Elbe esturay and Port of Hamburg in summer. We continously measured nitrate, nitrous oxide dry mole fraction and water column properties (oxygen, pH, salinity, temperature, fluorescence and turbidity) during our cruise. Water samples were taken regulary to measure dissolved inorganic nutrient, nitrate stable isotope composition, dissolved organic nitrogen, dissolved inorganic carbon, alkalinity, chlorophyll a, suspended marticular matter concentration, total and inorganic particulare phosphate. We also took water samples for DNA analysis. At six stations we did incubation experiments to determine nitrification rates. We focused on the Hamburg port area as we collected water and sediment samples in four different port basins and in the southern part of the Elbe esturay. Following, various incubation experiments were done in the laboratory to study the processes of the nitrogen cycle and between the water-sediment interface. We will use our collected data to study the nitrogen turnover processes and nitrous oxide production pathways along the Elbe estuary. It is planned to compare our results to other cruises in winter, spring, and fall to identify seasonal variations.
Messungen / Measurements
| Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
|---|---|---|---|---|---|---|
| HEREON | Schulz Gesa | 50 | stations | B02 Phytoplankton pigments (e.g. chlorophyll, fluorescence) |
discrete water samples, 2m below surface, chlorophyll a concentration | no |
| HEREON | Schulz Gesa | 140 | km | B02 Phytoplankton pigments (e.g. chlorophyll, fluorescence) |
continuous measurement, 2m bleow surface, fluorescence | no |
| HEREON | Russnack Vanessa | 25 | stations | B07 Pelagic bacteria / micro-organisms |
discrete water samples, 2m below surface, DNA | no |
| HEREON | Sanders Tina | 6 | stations | G02 Grab |
grab, C/N, chlorophyll concentration, amino acids | no |
| HEREON | Sanders Tina | 4 | stations | H10 CTD-Stations |
CTD, conductivity, temperature | no |
| HEREON | Schulz Gesa | 140 | km | H11 Sub-surface measurements underway (T, S) |
continuous measurement, 2m bleow surface, temperature, salinity | no |
| HEREON | Schulz Gesa | 140 | km | H21 Oxygen |
continuous measurement, 2m bleow surface, oxygen concentration, oxygen saturation | no |
| HEREON | Schulz Gesa | 50 | stations | H22 Phosphates |
discrete water samples, 2m below surface, dissolved phosphate concentration | no |
| HEREON | Schulz Gesa | 50 | stations | H24 Nitrates |
discrete water samples, 2m below surface, dissolved nitrate concentration | no |
| HEREON | Schulz Gesa | 140 | km | H24 Nitrates |
continuous measurement, 2m bleow surface, dissolved nitrate concentration | no |
| HEREON | Schulz Gesa | 50 | stations | H25 Nitrites |
discrete water samples, 2m below surface, dissolved nitrite concentration | no |
| HEREON | Schulz Gesa | 50 | stations | H26 Silicates |
discrete water samples, 2m below surface, dissolved silicate concentration | no |
| HEREON | Norbisrath Mona | 44 | stations | H27 Alkalinity |
discrete water samples, 2m below surface, alkalinity | no |
| HEREON | Schulz Gesa | 140 | km | H28 PH |
continuous measurement, 2m bleow surface, pH | no |
| HEREON | Schulz Gesa | 50 | stations | H32 Isotopes |
discrete water samples, 2m below surface, dissolved nitrate stable isotope compositions | no |
| HEREON | Schulz Gesa | 44 | stations | H33 Other dissolved gases |
discrete water samples, 2m bleow surface, dissolved methane concentration | no |
| HEREON | Schulz Gesa | 140 | km | H33 Other dissolved gases |
continuous measurement, 2m below surface, dissolved nitrous oxide dry mole fraction | no |
| HEREON | Sanders Tina | 50 | stations | H75 Total-N |
discrete water samples, 2m below surface, total nitrogen | no |
| HEREON | Schulz Gesa | 50 | stations | H76 Ammonia |
discrete water samples, 2m below surface, dissolved ammonium concentration | no |
| HEREON | Schulz Gesa | 140 | km | H80 Other physical measurements |
continuous measurement, 2m bleow surface, turbidity | no |
| HEREON | Schulz Gesa | 50 | stations | H90 Other chemical oceanographic measurements |
discrete water samples, 2m below surface, C/N ratios, nitorgen isotope of SPM | no |
| HEREON | Norbisrath Mona | 44 | stations | H90 Other chemical oceanographic measurements |
discrete water samples, 2m below surface, dissolved inorganic carbon | no |
| HEREON | Sanders Tina | 50 | stations | H90 Other chemical oceanographic measurements |
discrete water samples, 2m below surface, dissolved organic nitrogen | no |
| HEREON | Russnack Vanessa | 6 | stations | H90 Other chemical oceanographic measurements |
discrete water samples, 2m below surface, nitrification rates | no |
| HEREON | Russnack Vanessa | 50 | stations | H90 Other chemical oceanographic measurements |
discrete water samples, 2m below surface, inorganic and total particulare phosphate | no |
| HEREON | Schulz Gesa | 50 | stations | P01 Suspended matter |
discrete water samples, 2m below surface, suspended particular matter concentration | no |