Whole season net community production in the Weddell Sea

Depletions of total CO2, nitrate, phosphate and silicate in the surface layer were calculated for cruise ANT XXII/3 with FS Polarstern in March 2005 for estimating the annual net community production. East-west across the Weddell Sea the variation of all depletions is similar, but this holds to a le...

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Bibliographic Details
Published in:Polar Biology
Main Authors: Hoppema, Mario, Middag, Rob, de Baar, Hein J. W., Fahrbach, Eberhard, van Weerlee, Evaline M., Thomas, Helmuth, Weerle, E.M.
Format: Article in Journal/Newspaper
Language:English
Published: 2007
Subjects:
MARGINAL ICE-ZONE
SOUTHERN-OCEAN
ROSS SEA
ANTARCTIC OCEAN
INORGANIC CARBON
ATLANTIC SECTOR
IRON LIMITATION
PARTICLE-FLUX
SILICA CYCLE
SCOTIA SEA
Antarctic
Antarctic Ocean
Ross Sea
Scotia Sea
Southern Ocean
Weddell
Weddell Sea
Antarc*
Polar Biology
Online Access:http://hdl.handle.net/11370/3c906e78-7110-4ddb-ab89-c93ec9b0e8f9
https://research.rug.nl/en/publications/whole-season-net-community-production-in-the-weddell-sea(3c906e78-7110-4ddb-ab89-c93ec9b0e8f9).html
https://doi.org/10.1007/s00300-007-0336-5
Description
Summary:Depletions of total CO2, nitrate, phosphate and silicate in the surface layer were calculated for cruise ANT XXII/3 with FS Polarstern in March 2005 for estimating the annual net community production. East-west across the Weddell Sea the variation of all depletions is similar, but this holds to a lesser extent for silicate. Depletions in March 2005 are 2-3 times larger than those in January 1993 for the same transect. Very low N:P and C:P depletion ratios seem to point to dominance of diatoms, in the central Weddell Sea more than in the margin. Estimates of annual net community productions are about 1.8 and 3.5 mol C m(-2) year(-1) for the interior Weddell Sea and a near-margin region, respectively. The region does not comply with the classical view of a marginal ice zone with high productivity. Net community production is similar to annual export production, implying that remineralization in the ensuing winter be minor.

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