Importance of dissolved organic nitrogen in the north Atlantic Ocean in sustaining primary production: a 3-D modelling approach
Abstract. An eddy-permitting coupled ecosystem-circulation model including dissolved organic matter is used to estimate the dissolved organic nitrogen (DON) supply sus-taining primary production in the subtropical north Atlantic Ocean. After an analysis of the coupled model performances com-pared to...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2008
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.658.9622 http://www.biogeosciences.net/5/1437/2008/bg-5-1437-2008.pdf |
| Summary: | Abstract. An eddy-permitting coupled ecosystem-circulation model including dissolved organic matter is used to estimate the dissolved organic nitrogen (DON) supply sus-taining primary production in the subtropical north Atlantic Ocean. After an analysis of the coupled model performances com-pared to the data, a sensitivity study demonstrates the strong impact of parameter values linked to the hydrolysis of par-ticulate organic nitrogen and remineralisation of dissolved organic nitrogen on surface biogeochemical concentrations. The physical transport of dissolved organic nitrogen con-tributes to maintain the level of primary production in this subtropical gyre. It is dominated by the merid-ional component. We estimate a meridional net input of 0.039 molN m−2 yr−1 over the domain (13–35 ◦ N and 71– |
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