High Resolution Underway Nitrous Oxide Measurements (atmosphere) during METEOR cruise M99

DOI

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)

Identifier
DOI https://doi.org/10.1594/PANGAEA.902506
Related Identifier https://doi.org/10.1594/PANGAEA.902501
Related Identifier https://doi.org/10.1029/2018GL081648
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.902506
Provenance
Creator Arévalo-Martínez, Damian L ORCID logo; Bange, Hermann Werner ORCID logo
Publisher PANGAEA
Publication Year 2019
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 1331 data points
Discipline Earth System Research
Spatial Coverage (10.852W, -27.923S, 15.101E, -22.333N); Southeast Atlantic
Temporal Coverage Begin 2013-08-01T15:44:39Z
Temporal Coverage End 2013-08-22T19:37:11Z