Schulz, Gesa; Voynova, Yoana G; Metzke, Marc; Schmidt, Leon (2022): Nitrogen turnover in the Ems estuary 2020 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.942222
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Abstract:
We measured dissolved and particular inorganic nitrogen and dissolved nitrous oxide concentration in the Ems estuary (Germany). The sampling campaign was conducted on two consecutive days in June 2020 (11.06.2020– 12.06.2020) on board of the German research vessel Ludwig Prandtl. Water samples were taken approximately every 20 min during ebb tide from the North Sea around the island Borkum upstream to Papenburg. The discrete water samples were used to measure dissolved inorganic nutrient, nitrate stable isotope composition, suspended particular matter (SPM) concentration, particular carbon and nitrogen content of SPM and nitrogen stable isotope composition of SPM. An onboard membrane pump provided the on-line in situ FerryBox system with water from 2 m below the surface. It continuously measured oxygen, salinity, and temperature during our cruise. A N2O analyzer coupled (Model 914-0022, Los Gatos Res. Inc., San Jose, CA, USA) with a sea water/gas equilibrator using off-axis cavity output spectroscopy continuously detected dry mole fraction of dissolved nitrous oxide along the estuary. The aims of the study were 1) to investigate spatial dynamics in nitrogen turnover processes along the Ems estuary, 2) to identify their relation to nitrous oxide production and 3) to unravel controlling factors of the nitrogen circle.
Related to:
Schulz, Gesa; Sanders, Tina; van Beusekom, Justus; Voynova, Yoana G; Schöl, Andreas; Dähnke, Kirstin (2022): Suspended Particulate Matter drives the spatial segregation of nitrogen turnover along the hyper-turbid Ems estuary. Biogeosciences, https://doi.org/10.5194/bg-2021-321
Project(s):
Helmholtz-Zentrum Hereon (Hereon)
Coverage:
Median Latitude: 53.334583 * Median Longitude: 7.080892 * South-bound Latitude: 53.030000 * West-bound Longitude: 6.433826 * North-bound Latitude: 53.611798 * East-bound Longitude: 7.413752
Date/Time Start: 2020-06-11T05:56:00 * Date/Time End: 2020-06-12T17:17:00
Minimum DEPTH, water: 2 m * Maximum DEPTH, water: 2 m
Event(s):
LP20200602_Underway_station_700 * Latitude: 53.354344 * Longitude: 6.988616 * Date/Time: 2020-06-11T05:56:00 * Location: Ems estuary * Campaign: LP20200602 * Basis: Ludwig Prandtl * Method/Device: Water sample (WS)
LP20200602_Underway_station_701 * Latitude: 53.324633 * Longitude: 7.067333 * Date/Time: 2020-06-11T06:27:00 * Location: Ems estuary * Campaign: LP20200602 * Basis: Ludwig Prandtl * Method/Device: Water sample (WS)
LP20200602_Underway_station_702 * Latitude: 53.331888 * Longitude: 7.162720 * Date/Time: 2020-06-11T06:58:00 * Location: Ems estuary * Campaign: LP20200602 * Basis: Ludwig Prandtl * Method/Device: Water sample (WS)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Schulz, Gesa | |||
| 2 | Sample ID | Sample ID | Schulz, Gesa | |||
| 3 | DEPTH, water | Depth water | m | Schulz, Gesa | Geocode | |
| 4 | Latitude of event | Latitude | Schulz, Gesa | |||
| 5 | Longitude of event | Longitude | Schulz, Gesa | |||
| 6 | Date/Time of event | Date/Time | Schulz, Gesa | |||
| 7 | Sample method | Sample method | Schulz, Gesa | |||
| 8 | Temperature, water | Temp | °C | Schulz, Gesa | On-line-in-situ FerryBox-System (Pertersen et al. 2001) | measured in water column; Measurement by on-line-in-situ FerryBox-System (Pertersen et al. 2001) |
| 9 | Salinity | Sal | Schulz, Gesa | On-line-in-situ FerryBox-System (Pertersen et al. 2001) | PSU; measured in water column; Measurement by on-line-in-situ FerryBox-System (Pertersen et al. 2001) | |
| 10 | Oxygen | O2 | µmol/l | Schulz, Gesa | On-line-in-situ FerryBox-System (Pertersen et al. 2001) | measured in water column; Measurement by on-line-in-situ FerryBox-System (Pertersen et al. 2001) |
| 11 | δ18O, nitrate | δ18O NO3 | ‰ | Schulz, Gesa | 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 | measured in water column, vs. VSMOW; 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 |
| 12 | δ15N, nitrate | δ15N NO3 | ‰ air | Schulz, Gesa | 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 | 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 |
| 13 | Silicate, dissolved | DSi(OH)4 | µmol/l | Schulz, Gesa | Continuous flow analyser (AA3, Seal Analytics, Germany) | 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 |
| 14 | Nitrogen in nitrite | N-[NO2]- | µmol/l | Schulz, Gesa | Continuous flow analyser (AA3, Seal Analytics, Germany) | 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 |
| 15 | Nitrogen in ammonium | N-[NH4]+ | µmol/l | Schulz, Gesa | Continuous flow analyser (AA3, Seal Analytics, Germany) | 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 |
| 16 | Nitrogen in nitrate | N-[NO3]- | µmol/l | Schulz, Gesa | Continuous flow analyser (AA3, Seal Analytics, Germany) | 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 |
| 17 | Phosphorus in orthophosphate | P-[PO4]3- | µmol/l | Schulz, Gesa | Continuous flow analyser (AA3, Seal Analytics, Germany) | 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 |
| 18 | Nitrous oxide saturation | N2O sat | % | Schulz, Gesa | N2O analyzer (Los Gatos Research, Model 914-0022, LGR) | measured in water column; An N2O analyzer (Los Gatos Research, Model 914-0022, LGR) was used to measure gas-phase mole fractions of N2O as well as water vapor (H2O) using off-axis integrated cavity output spectroscopy (ICOS) (Baer, Paul et al. 2002) |
| 19 | Nitrous oxide | N2O | nmol/l | Schulz, Gesa | N2O analyzer (Los Gatos Research, Model 914-0022, LGR) | measured in water column; An N2O analyzer (Los Gatos Research, Model 914-0022, LGR) was used to measure gas-phase mole fractions of N2O as well as water vapor (H2O) using off-axis integrated cavity output spectroscopy (ICOS) (Baer, Paul et al. 2002) |
| 20 | Nitrous oxide | N2O | ppmv | Schulz, Gesa | N2O analyzer (Los Gatos Research, Model 914-0022, LGR) | measured in water column; An N2O analyzer (Los Gatos Research, Model 914-0022, LGR) was used to measure gas-phase mole fractions of N2O as well as water vapor (H2O) using off-axis integrated cavity output spectroscopy (ICOS) (Baer, Paul et al. 2002) |
| 21 | Suspended particulate matter | SPM | mg/l | Schulz, Gesa | 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 | |
| 22 | Carbon, total, particulate | TPC | % | Schulz, Gesa | Elemental analyser | wt. %; measured in suspended particulate matter; Elemental analyser of University Hamburg, bulk sample |
| 23 | Carbon, organic, particulate | POC | % | Schulz, Gesa | Elemental analyser | wt. %; measured in suspended particulate matter; Elemental analyser of University Hamburg, bulk sample |
| 24 | δ15N | δ15N | ‰ air | Schulz, Gesa | Element analyser, Carlo Erba NA2500, coupled with an isotope ratio mass spectrometerFinnigan MAT 252 | measured in suspended particulate matter, permille versus air nitrogen; d15N-SPM was analysed with an element analyser (Carlo Erba NA 2500) coupled with an isotope ratio mass spectrometer (Finnigan MAT 252). 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 |
| 25 | Nitrogen, particulate | PN | % | Schulz, Gesa | Elemental analyser | measured in suspended particulate matter; Elemental analyser of University Hamburg, bulk sample |
| 26 | Carbon/Nitrogen ratio | C/N | Schulz, Gesa | Elemental analyser | molar ratio of the percentage; measured in suspended particulate matter; Elemental analyser of University Hamburg, bulk sample |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
682 data points