We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Biological productivity in the Mauritanian upwelling estimated with a triple gas approach.
- Authors
Steinhoff, T.; Bange, H. W.; Kock, A.; Wallace, D. W. R.; Körtzinger, A.
- Abstract
Due to their high biological productivity coastal upwelling regions are important for biogeochemical cycles in the ocean and for fisheries. Upwelled water is not only enriched in nutrients but also supersaturated with respect to atmospheric CO2 and N2O and undersaturated for O2. We present a novel approach to estimate carbon based net community production (NCP) using surface ocean data for CO2, O2 and N2O from three cruises to the Mauritanian upwelling region (Northwest Africa) that were conducted in different seasons. Through combination of the saturation patterns of CO2, O2 and N2O effects of air-sea gas exchange and NCP could be separated. NCP values ranges from 0.6±0.1gCm-2 d-1 during times of weak upwelling to 1.6±0.4gCm-2 d-1 during 10 strong upwelling. The estimated NCP values show a strong relationship with a wind derived upwelling index, which was used to estimate annual NCP.
- Subjects
NORTHWEST Africa; BIOLOGICAL productivity; UPWELLING (Oceanography); BIOGEOCHEMICAL cycles; ATMOSPHERIC models; ESTIMATION theory
- Publication
Biogeosciences Discussions, 2012, Vol 9, Issue 4, p4853
- ISSN
1810-6277
- Publication type
Article
- DOI
10.5194/bgd-9-4853-2012