Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Dangl, Gabriela; Frey, Claudia; Hassenrück, Christiane; Sabbaghzadeh, Bita; Wäge-Recchioni, Janine; Lehmann, Moritz F; Ley, Martin; Rehder, Gregor; Jürgens, Klaus (2023): Nitrous oxide measurements in the Benguela Upwelling System during METEOR cruise M157 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.955991

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Upwelling systems are significant sources of atmospheric nitrous oxide (N₂O). The Benguela Upwelling System is one of the most productive regions worldwide and a temporally variable source of N₂O. Strong O₂ depletions above the shelf are favoring periodically OMZ formations. We aimed to assess underlying N₂O production and consumption processes on different temporal and spatial scales during austral winter in the Benguela Upwelling System, when O₂⁻deficiency in the water column is relatively low.
The fieldwork took place during the cruise M157 (August 4ᵗʰ – September 16ᵗʰ 2019) onboard the R/V METEOR. This expedition included four close-coastal regions around Walvis Bay at 23°S, which presented the lowest O₂ concentrations near the seafloor and thus may provide hotspots of N₂O production.
Seawater was collected in 10 L free-flow bottles by using a rosette system equipped with conductivity-temperature-depth (CTD) sensors (SBE 911plus, Seabird-electronics, USA).Seawater samples were collected from 10 L free-flow bottles bubble-free, filled into 200 mL serum bottles and immediately fixed with saturated mercury chloride (HgCl₂). Concentrations of dissolved N₂O were measured by a purge and trap system using a dynamic headspace (Sabbaghzadeh et al., 2021). The N₂O gas saturation (N₂Oₛₐₜ in %) was calculated from the concentration ratio between the seawater sample and seawater equilibrated with the atmosphere. ∆N₂O (N₂O saturation disequilibrium in nmol L⁻¹) was calculated as the difference between the measured N₂O concentration and the atmospheric equilibrium N₂O concentration using Bunsen solubility coefficient (Weiss and Price, 1980). AOU (apparent oxygen utilization in µmol L⁻¹) expresses the O₂ consumption by microbial respiration and was calculated as the difference between the equilibrated O₂ and observed O₂ concentration with the same physico-chemical properties (Weiss and Price, 1980).
Keyword(s):
apparent oxygen utilization; Benguela Upwelling System; Field observation; Namibia; nitrous oxide; oxygen minimum zone
Related to:
Dangl, Gabriela; Frey, Claudia; Hassenrück, Christiane; Sabbaghzadeh, Bita; Wäge-Recchioni, Janine; Lehmann, Moritz F; Ley, Martin; Rehder, Gregor; Jürgens, Klaus (2023): 16S amplicon sequences of the microbial communities in the water column of the Northern Benguela Upwelling System. European Nucleotide Archive (ENA), https://www.ebi.ac.uk/ena/browser/view/PRJEB60503
Dangl, Gabriela; Frey, Claudia; Hassenrück, Christiane; Sabbaghzadeh, Bita; Wäge-Recchioni, Janine; Lehmann, Moritz F; Ley, Martin; Rehder, Gregor; Jürgens, Klaus (2023): Inorganic nutrient measurements in the Benguela Upwelling System during METEOR cruise M157. PANGAEA, https://doi.org/10.1594/PANGAEA.956014
Dangl, Gabriela; Frey, Claudia; Hassenrück, Christiane; Sabbaghzadeh, Bita; Wäge-Recchioni, Janine; Lehmann, Moritz F; Ley, Martin; Rehder, Gregor; Jürgens, Klaus (2023): Nitrous oxide production rates and stable isotopes in the Benguela Upwelling System during METEOR cruise M157. PANGAEA, https://doi.org/10.1594/PANGAEA.956016
Dangl, Gabriela; Frey, Claudia; Hassenrück, Christiane; Sabbaghzadeh, Bita; Wäge-Recchioni, Janine; Lehmann, Moritz F; Ley, Martin; Rehder, Gregor; Jürgens, Klaus (2023): Water and sediment metagenomes from the Northern Benguela Upwelling System (cruise M157). European Nucleotide Archive (ENA), https://www.ebi.ac.uk/ena/browser/view/PRJEB63098
Sabbaghzadeh, Bita; Glockzin, Michael; Rehder, Gregor (2022): Trace gases air daily means during METEOR cruise M157. PANGAEA, https://doi.org/10.1594/PANGAEA.946811
Zabel, Matthias (2020): Short Cruise Report RV METEOR Cruise M157. Expeditionsarchiv FS METEOR, 13, https://www.ldf.uni-hamburg.de/meteor/wochenberichte/wochenberichte-meteor/m156-m159/m157-scr.pdf (m157-scr.pdf)
References:
Sabbaghzadeh, Bita; Arévalo-Martínez, Damian L; Glockzin, Michael; Otto, Stefan; Rehder, Gregor (2021): Meridional and Cross‐Shelf Variability of N 2 O and CH 4 in the Eastern‐South Atlantic. Journal of Geophysical Research: Oceans, 126(11), https://doi.org/10.1029/2020JC016878
Weiss, Ray F; Price, B A (1980): Nitrous oxide solubility in water and seawater. Marine Chemistry, 8(4), 347-359, https://doi.org/10.1016/0304-4203(80)90024-9
Coverage:
Median Latitude: -23.000095 * Median Longitude: 14.219062 * South-bound Latitude: -23.000167 * West-bound Longitude: 14.046633 * North-bound Latitude: -23.000000 * East-bound Longitude: 14.366750
Date/Time Start: 2019-08-21T20:00:00 * Date/Time End: 2019-08-24T04:52:00
Minimum DEPTH, water: 5 m * Maximum DEPTH, water: 127 m
Event(s):
M157_2-8  * Latitude: -23.000167 * Longitude: 14.366750 * Date/Time: 2019-08-24T04:52:00 * Elevation: -46.0 m * Campaign: M157 (BUSUC 1) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M157_14-2  * Latitude: -23.000117 * Longitude: 14.046633 * Date/Time: 2019-08-21T20:00:00 * Elevation: -138.0 m * Campaign: M157 (BUSUC 1) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M157_16-3  * Latitude: -23.000000 * Longitude: 14.215717 * Date/Time: 2019-08-22T17:53:00 * Elevation: -119.0 m * Campaign: M157 (BUSUC 1) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventDangl, Gabriela
2 Station labelStationDangl, Gabriela
3 Sample code/labelSample labelDangl, GabrielaSample title used in 16S amplicon sequence data submission
4 DATE/TIMEDate/TimeDangl, GabrielaGeocode
5 LATITUDELatitudeDangl, GabrielaGeocode
6 LONGITUDELongitudeDangl, GabrielaGeocode
7 DEPTH, waterDepth watermDangl, GabrielaCTD, Sea-Bird SBE 911plusGeocode
8 Partial pressure of nitrous oxide in wet airXN2O_wetppmvDangl, GabrielaMeasured according to Sabbaghzadeh et al. (2021)
9 Nitrous oxide, dry airN2O airppmvDangl, Gabriela
10 Oxygen, apparent utilizationAOUµmol/lDangl, GabrielaCalculated according to Weiss and Price (1980)
11 Nitrous oxide, dissolvedN2Onmol/lDangl, GabrielaCalculated according to Weiss and Price (1980)in equilibrium with sea surface
12 Nitrous oxide, dissolved, disequilibriumN2O diss diseqnmol/lDangl, Gabriela
13 Nitrous oxide saturationN2O sat%Dangl, Gabriela
14 Nitrous oxide, dissolvedN2Onmol/lDangl, GabrielaGas chromatography, Agilent 7820B, coupled with a flame ionization detector and an Electron Capture Detectorin-situ
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
332 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Station		3 
Sample label
(Sample title used in 16S ampl...)		4 
Date/Time		5 
Latitude		6 
Longitude		7 
Depth water [m]
(CTD, Sea-Bird SBE 911plus)		8 
XN2O_wet [ppmv]
(Measured according to Sabbagh...)		9 
N2O air [ppmv]		10 
AOU [µmol/l]
(Calculated according to Weiss...)		11 
N2O [nmol/l]
(in equilibrium with sea surfa...)		12 
N2O diss diseq [nmol/l]		13 
N2O sat [%]		14 
N2O [nmol/l]
(in-situ, Gas chromatography, ...)
M157_2-8 N23002EVAR1292019-08-24T04:52:00-23.00016714.36675050.330.3435.589.8114.39246.7224.20
M157_2-8N23002EVAR1302019-08-24T04:52:00-23.00016714.366750100.330.3443.909.8014.53248.1924.33
M157_2-8N23002EVAR1312019-08-24T04:52:00-23.00016714.366750150.330.3489.249.9416.11262.1426.05
M157_2-8N23002EVAR1322019-08-24T04:52:00-23.00016714.366750250.330.34233.4810.2217.06266.8827.28
M157_2-8N23002EVAR1332019-08-24T04:52:00-23.00016714.366750350.330.34258.7510.2218.24278.4128.46
M157_2-8N23002EVAR1342019-08-24T04:52:00-23.00016714.366750400.330.34265.9010.2221.95314.7532.17
M157_17-2 N23005EVAR1022019-08-23T23:31:00-23.00015014.31665050.330.34-128.119.6012.90234.3422.50
M157_17-2N23005EVAR1032019-08-23T23:31:00-23.00015014.316650100.330.34-110.549.6513.63241.3323.28
M157_17-2N23005EVAR1042019-08-23T23:31:00-23.00015014.316650150.330.34-70.069.7416.83272.8026.57
M157_17-2N23005EVAR1052019-08-23T23:31:00-23.00015014.316650250.330.34145.9910.1022.30320.8532.40
M157_17-2N23005EVAR1062019-08-23T23:31:00-23.00015014.316650300.330.34176.2110.1622.28319.3432.44
M157_17-2N23005EVAR1072019-08-23T23:31:00-23.00015014.316650400.330.34196.9010.2424.07335.0534.31
M157_17-2N23005EVAR1082019-08-23T23:31:00-23.00015014.316650500.330.34231.2810.2723.99333.7134.26
M157_17-2N23005EVAR1092019-08-23T23:31:00-23.00015014.316650650.330.34263.0210.2827.92371.5038.20
M157_17-2N23005EVAR1102019-08-23T23:31:00-23.00015014.316650700.330.34265.9910.2828.36375.7838.64
M157_16-3 N23010EVAR1012019-08-22T17:53:00-23.00000014.21571750.330.34-65.999.886.52166.0016.40
M157_16-3N23010EVAR912019-08-22T17:53:00-23.00000014.215717100.330.34-60.849.907.76178.4017.66
M157_16-3N23010EVAR922019-08-22T17:53:00-23.00000014.215717200.330.3434.6410.107.92178.4318.02
M157_16-3N23010EVAR932019-08-22T17:53:00-23.00000014.215717300.330.3445.0310.119.54194.3719.65
M157_16-3N23010EVAR942019-08-22T17:53:00-23.00000014.215717400.330.3496.1810.2012.92226.7023.11
M157_16-3N23010EVAR952019-08-22T17:53:00-23.00000014.215717500.330.34131.7910.2614.20238.3824.46
M157_16-3N230102019-08-22T17:53:00-23.00000014.215717600.330.34159.8710.3117.38268.5227.69
M157_16-3N23010EVAR962019-08-22T17:53:00-23.00000014.215717700.330.34167.8610.3218.67280.8428.99
M157_16-3N23010EVAR972019-08-22T17:53:00-23.00000014.215717800.330.34175.6810.3319.04284.3329.37
M157_16-3N23010EVAR982019-08-22T17:53:00-23.00000014.215717900.330.34207.4610.3621.34306.0231.70
M157_16-3N23010EVAR992019-08-22T17:53:00-23.00000014.2157171000.330.34256.3210.4123.34324.0933.75
M157_16-3N23010EVAR1002019-08-22T17:53:00-23.00000014.2157171050.330.34262.0110.4224.48335.0234.90
M157_14-2 N23020EVAR812019-08-21T20:00:00-23.00011714.04663350.330.34-25.189.965.51155.3215.47
M157_14-2N23020EVAR822019-08-21T20:00:00-23.00011714.046633100.330.34-25.229.965.78158.0415.74
M157_14-2N23020EVAR832019-08-21T20:00:00-23.00011714.046633200.330.3412.0410.056.21161.8416.26
M157_14-2N23020EVAR842019-08-21T20:00:00-23.00011714.046633300.330.3425.1210.086.26162.1016.34
M157_14-2N23020EVAR852019-08-21T20:00:00-23.00011714.046633500.330.3495.4910.186.19160.8016.36
M157_14-2N23020EVAR862019-08-21T20:00:00-23.00011714.046633600.330.34120.1310.248.56183.5718.80
M157_14-2N23020EVAR872019-08-21T20:00:00-23.00011714.046633800.330.34175.7610.3112.43220.4922.74
M157_14-2N23020EVAR882019-08-21T20:00:00-23.00011714.046633900.330.34206.4810.3613.80233.1724.15
M157_14-2N23020EVAR892019-08-21T20:00:00-23.00011714.0466331100.330.34236.6910.4015.40248.1025.79
M157_14-2N23020EVAR902019-08-21T20:00:00-23.00011714.0466331270.330.34243.0410.4016.73260.7827.13