Biological Productivity in the Mauritanian upwelling estimated with a triple gas approach.

Steinhoff, Tobias, Bange, Hermann W. , Kock, Annette , Wallace, Douglas W.R. and Körtzinger, Arne (2012) Biological Productivity in the Mauritanian upwelling estimated with a triple gas approach. [Poster] In: SOLAS Open Science Conference. , 07. - 10.05.2012, Cle Elum, Washington, USA .

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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 atmosphere) with CO2 and N2O and undersaturated with O2. We present a novel carbon based approach to estimate Net Community Production (NCP) using surface ocean data for CO2, O2 and N2O from three SOPRAN cruises to the Mauritanian upwelling region (Northwest Africa) that were conducted in different seasons. Through combination of the saturation patterns of CO2, O2 and N2Oair-sea gas exchange and NCP could be separated. NCP values ranges from 0.6 ± 0.1 g C m 2d 1 during times of weak upwelling to 1.6 ± 0.4 g C m 2d 1 during a strong upwelling situation. The estimated NCP values show a strong relationship with a wind derived upwelling index, which was used to estimate annual NCP.

Document Type: Conference or Workshop Item (Poster)
Keywords: Meereswissenschaften; Marine chemistry; Biogeochemistry
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Projects: SOPRAN
Date Deposited: 05 Jun 2012 06:33
Last Modified: 05 Jun 2012 06:33
URI: http://oceanrep.geomar.de/id/eprint/14391

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