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| Titel |
Methane emissions from the upwelling area off Mauritania (NW Africa) |
| VerfasserIn |
A. Kock, S. Gebhardt, H. W. Bange |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 5, no. 4 ; Nr. 5, no. 4 (2008-08-05), S.1119-1125 |
| Datensatznummer |
250002682
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| Publikation (Nr.) |
 copernicus.org/bg-5-1119-2008.pdf |
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| Zusammenfassung |
| Coastal upwelling regions have been identified as sites of enhanced CH4
emissions to the atmosphere. The coastal upwelling area off Mauritania (NW
Africa) is one of the most biologically productive regions of the world's
ocean but its CH4 emissions have not been quantified so far. More than
1000 measurements of atmospheric and dissolved CH4 in the surface layer
in the upwelling area off Mauritania were performed as part of the German
SOPRAN (Surface Ocean Processes in the Anthropocene) study during two
cruises in March/April 2005 (P320/1) and February 2007 (P348). During P348
enhanced CH4 saturations of up to 200% were found close to the coast
and were associated with upwelling of South Atlantic Central Water. An
area-weighted, seasonally adjusted estimate yielded overall annual CH4
emissions in the range from 1.6 to 2.9 Gg CH4. Thus the upwelling area
off Mauritania represents a regional hot spot of CH4 emissions but
seems to be of minor importance for the global oceanic CH4 emissions. |
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