Arévalo-Martínez, Damian L; Bange, Hermann Werner (2019): High Resolution Underway Nitrous Oxide Measurements (water) during METEOR cruise M98 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.902500, In supplement to: Arévalo-Martínez, Damian L; Steinhoff, T; Brandt, Peter; Körtzinger, Arne; Lamont, Tarron; Rehder, Gregor; Bange, Hermann Werner (2019): N2O Emissions From the Northern Benguela Upwelling System. Geophysical Research Letters, 46(6), 3317-3326, https://doi.org/10.1029/2018GL081648
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Abstract:
The Benguela Upwelling System (BUS) is the most productive of all eastern boundary upwelling ecosystems and it hosts a well-developed oxygen minimum zone. As such, the BUS is a potential hotspot for production of N2O, a potent greenhouse gas derived from microbially driven decay of sinking organic matter. Yet, the extent at which near-surface waters emit N2O to the atmosphere in the BUS is highly uncertain. Here we present the first high-resolution surface measurements of N2O across the northern part of the BUS (nBUS).We found strong gradients with a threefold increase in N2O concentrations near the coast as compared with open ocean waters. Our observations show enhanced sea-to-air fluxes of N2O (up to 1.67 nmol m−2 s−1) in association with local upwelling cells. Based on our data we suggest that the nBUS can account for 13% of the total coastal upwelling source of N2O to the atmosphere
Project(s):
Funding:
Seventh Framework Programme (FP7), grant/award no. 284274: Integrated non-CO2 Greenhouse gas Observing System
Coverage:
Median Latitude: -10.567223 * Median Longitude: -12.937099 * South-bound Latitude: -18.104000 * West-bound Longitude: -35.903000 * North-bound Latitude: -5.116500 * East-bound Longitude: 13.553400
Date/Time Start: 2013-07-03T12:58:31 * Date/Time End: 2013-07-26T13:16:03
Minimum DEPTH, water: 6 m * Maximum DEPTH, water: 6 m
Event(s):
M98-track * Latitude Start: -3.716200 * Longitude Start: -38.533800 * Latitude End: -22.941000 * Longitude End: 14.503000 * Date/Time Start: 2013-07-01T00:00:00 * Date/Time End: 2013-07-28T00:00:00 * Location: Atlantic Ocean * Campaign: M98 (RACE SACUS) * Basis: Meteor (1986) * Method/Device: Underway cruise track measurements (CT) * Comment: Fortaleza - Walvis Bay
Comment:
Gas molar fraction of N2O (1-min means) was calibrated according to the procedure from Arevalo-MartÌnez et. al (2013)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Arévalo-Martínez, Damian L | Geocode | ||
| 2 | LATITUDE | Latitude | Arévalo-Martínez, Damian L | Geocode | ||
| 3 | LONGITUDE | Longitude | Arévalo-Martínez, Damian L | Geocode | ||
| 4 | DEPTH, water | Depth water | m | Arévalo-Martínez, Damian L | Geocode | |
| 5 | Sea surface temperature | SST | °C | Arévalo-Martínez, Damian L | ||
| 6 | Sea surface salinity | SSS | Arévalo-Martínez, Damian L | |||
| 7 | Temperature at equilibration | Tequ | °C | Arévalo-Martínez, Damian L | ||
| 8 | Nitrous oxide, dry-air mole fraction | N2O | nmol/mol | Arévalo-Martínez, Damian L | ||
| 9 | Nitrous oxide, dissolved | N2O | nmol/l | Arévalo-Martínez, Damian L | Gas chromatography (unfiltered) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
108206 data points
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