10.1594/PANGAEA.902507
Arévalo-Martínez, Damian L
Damian L
Arévalo-Martínez
0000-0003-2933-1586
Bange, Hermann Werner
Hermann Werner
Bange
0000-0003-4053-1394
High Resolution Underway Nitrous Oxide Measurements (water) during METEOR cruise M99
PANGAEA
2019
DATE/TIME
LATITUDE
DEPTH, water
LONGITUDE
Sea surface temperature
Sea surface salinity
Temperature at equilibration
Nitrous oxide, dry-air mole fraction
Nitrous oxide, dissolved
Underway cruise track measurements
Gas chromatography (unfiltered)
M99
Meteor (1986)
Surface Ocean Processes in the Anthropocene (SOPRAN)
2013-08-01T13:50:15/2013-08-22T22:42:11
en
Dataset
10.1594/PANGAEA.902501
10.1029/2018GL081648
92358 data points
text/tab-separated-values
Creative Commons Attribution 4.0 International
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
Gas molar fraction of N2O (1-min means) was calibrated according to the procedure from Arevalo-MartÌnez et. al (2013)
10.8402
14.9368
-28.2392
-22.3301
Southeast Atlantic