Nagel, Birgit; Emeis, Kay-Christian; Dähnke, Kirstin (2018): Nutrients and delta15N measured in water samples in the Northern Benguela upwelling system during the Africana campaign AF258_B in 2009 [dataset]. Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research, PANGAEA, https://doi.org/10.1594/PANGAEA.892381
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Abstract:
Temperature, salinity and fluorescence data of CTD (Seabird 911+) bottle files (reference to data set doi:10.1594/PANGAEA.784365). Concentrations of nutrients in discrete samples from rosette after filtration of seawater by auto-analyser. Nutrients of samples were measured with a Bran & Luebbe autoanalyzer in the home laboratory in Hamburg by applying standard methods. Nitrate isotope composition (delta15N-nitrate) referenced against air-N2 determined by mass spectrometry after conversion of nitrate to N2O by the denitrifyer method. Methods are detailed in Nagel et al. (2013).
Related to:
Mohrholz, Volker (2012): Hydrographic measurements in the Northern Benguela upwelling system during the cruise AFR 258. Leibniz Institute for Baltic Sea Research, Warnemünde, PANGAEA, https://doi.org/10.1594/PANGAEA.784365
Further details:
Nagel, Birgit; Emeis, Kay-Christian; Flohr, Anita; Rixen, Tim; Schlarbaum, Tim; Mohrholz, Volker; van der Plas, Anja K (2013): N-cycling and balancing of the N-deficit generated in the oxygen minimum zone over the Namibian shelf-An isotope-based approach. Journal of Geophysical Research: Biogeosciences, 118(1), 361-371, https://doi.org/10.1002/jgrg.20040
Project(s):
Funding:
Bundesministerium für Bildung und Forschung, Bonn (BMBF), grant/award no. 03F0650: Geochemistry and ecology of the Namibian upwelling system
Coverage:
Median Latitude: -20.681944 * Median Longitude: 12.495831 * South-bound Latitude: -24.433330 * West-bound Longitude: 10.500000 * North-bound Latitude: -17.250000 * East-bound Longitude: 14.483333
Date/Time Start: 2009-12-06T13:33:00 * Date/Time End: 2009-12-14T03:57:00
Minimum DEPTH, water: 5.0 m * Maximum DEPTH, water: 1500.0 m
Event(s):
AFR258_30250_1 (Fi-7_1) * Latitude: -24.433330 * Longitude: 14.466660 * Date/Time Start: 2009-12-06T13:33:00 * Date/Time End: 2009-12-06T14:16:00 * Elevation: -48.0 m * Location: Benguela Upwelling * Campaign: AFR258 * Basis: Africana (1982) * Method/Device: CTD/Rosette (CTD-RO)
AFR258_30252_1 (T-5-4_1) * Latitude: -19.000000 * Longitude: 12.250000 * Date/Time Start: 2009-12-08T16:10:00 * Date/Time End: 2009-12-08T16:30:00 * Elevation: -114.0 m * Location: Benguela Upwelling * Campaign: AFR258 * Basis: Africana (1982) * Method/Device: CTD/Rosette (CTD-RO)
AFR258_30254_1 (T-5-1_1) * Latitude: -19.000000 * Longitude: 11.433330 * Date/Time Start: 2009-12-09T03:08:00 * Date/Time End: 2009-12-09T03:30:00 * Elevation: -433.0 m * Location: Benguela Upwelling * Campaign: AFR258 * Basis: Africana (1982) * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Emeis, Kay-Christian | |||
| 2 | Latitude of event | Latitude | Emeis, Kay-Christian | |||
| 3 | Longitude of event | Longitude | Emeis, Kay-Christian | |||
| 4 | Elevation of event | Elevation | m | Emeis, Kay-Christian | ||
| 5 | DEPTH, water | Depth water | m | Emeis, Kay-Christian | Geocode | |
| 6 | Date/Time of event | Date/Time | Emeis, Kay-Christian | |||
| 7 | Temperature, water | Temp | °C | Emeis, Kay-Christian | CTD | Measured in water column |
| 8 | Salinity | Sal | Emeis, Kay-Christian | CTD | Measured in water column | |
| 9 | Oxygen | O2 | µmol/l | Emeis, Kay-Christian | Clarke-type sensor | measured in water column |
| 10 | Fluorescence | Fluorescence | arbitrary units | Emeis, Kay-Christian | CTD | Measured in water column |
| 11 | Nitrate | [NO3]- | µmol/l | Emeis, Kay-Christian | Colorimetric | Measured in water column. Standard-calorimetric method (according to Grasshoff et al. 1999), with auto-analyser. Average of the measurement of 2 replicates. |
| 12 | Phosphate | [PO4]3- | µmol/l | Emeis, Kay-Christian | Colorimetric | Measured in water column. Standard-calorimetric method (according to Grasshoff et al. 1999), with auto-analyser. Average of the measurement of 2 replicates. |
| 13 | Silicate | Si(OH)4 | µmol/l | Emeis, Kay-Christian | Colorimetric | Measured in water column. Standard-calorimetric method (according to Grasshoff et al. 1999), with auto-analyser. Average of the measurement of 2 replicates. |
| 14 | Ammonium | [NH4]+ | µmol/l | Emeis, Kay-Christian | Colorimetric | Measured in water column. Standard-calorimetric method (according to Grasshoff et al. 1999), with auto-analyser. Average of the measurement of 2 replicates. |
| 15 | Nitrite | [NO2]- | µmol/l | Emeis, Kay-Christian | Colorimetric | Measured in water column. Standard-calorimetric method (according to Grasshoff et al. 1999), with auto-analyser. Average of the measurement of 2 replicates. |
| 16 | δ15N, nitrate | δ15N NO3 | ‰ air | Emeis, Kay-Christian | Isotope ratio mass spectrometry | 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. |
License:
(UNKNOWN)
Size:
877 data points