Mathematics – Logic
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3821606r&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 21, CiteID L21606
Mathematics
Logic
2
Biogeosciences: Nitrogen Cycling, Oceanography: General: Upwelling And Convergences (4964), Oceanography: Physical: Air/Sea Interactions (0312, 3339), Oceanography: Biological And Chemical: Gases, Geographic Location: Atlantic Ocean
Scientific paper
Concentrations of dissolved nitrous oxide (N2O) and N2O flux densities were determined during the Lagrangian investigation of two filaments advected from the Mauritanian upwelling. The ratio between remineralization and N2O production, predominantly through nitrification was 0.11 ± 0.01%. This was linked to the hydrodynamic character of each filament, which was determined by the relative proportions of two central water masses from which they originated. Surface waters were saturated with N2O up to 150% when first upwelled, but following advective transport offshore and exchange with the atmosphere at rates between 5 and 27 μmol m-2d-1 were closer to equilibrium with the atmosphere (105%) when the filament was approximately two weeks old. Annual estimates of N2O emissions from transient filaments in this area are between 1.3 and 2.1 Gg N, but could be as high as 9.8 Gg N y-1 for the extended upwelling area in the vicinity of Cap Blanc.
Brown Ian J.
Clark Darren R.
Rees Andrew P.
Torres Ricardo
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