Seasonal variation in vertical flux of biogenic matter in the marginal ice zone and the central Barents Sea

The spatial and seasonal variations in the vertical flux of particulate biogenic matter were investigated in the Barents Sea in winter and spring 1998 and summer 1999. Arrays of simple cylindrical sediment traps were moored for 24 h between 30 and 200 m along a transect from the ice-free Atlantic wa...

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Bibliographic Details
Published in:Journal of marine systems 2002-12, Vol.38 (1), p.189-204
Main Authors: Olli, Kalle, Wexels Riser, Christian, Wassmann, Paul, Ratkova, Tatjana, Arashkevich, Elena, Pasternak, Anna
Format: Article
Language:English
Subjects:
Barents Sea
Dinobryon balticum
Marine
Ochromonas
Ochromonas crenata
Particulate organic matter
Phaeocystis pouchetii
Phytoplankton
Sediment traps
Thalassiosira antarctica
Vertical flux
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Summary:The spatial and seasonal variations in the vertical flux of particulate biogenic matter were investigated in the Barents Sea in winter and spring 1998 and summer 1999. Arrays of simple cylindrical sediment traps were moored for 24 h between 30 and 200 m along a transect from the ice-free Atlantic water to Arctic water with up to 80% ice cover. Large gradients in the quantity and composition of the sinking particles were observed in the south–north direction, and in relation to water column structure and stability, which depend on the processes of ice retreat. The magnitude of the vertical flux of particulate organic carbon (POC) out of the upper mixed layer ranged from background winter values (30–70 mg C m −2 day −1) to 150–300 mg C m −2 day −1 in summer and 500–1500 mg C m −2 day −1 in spring. Vertical flux of chlorophyll a (CHL) was negligible in winter, generally
ISSN:0924-7963
1879-1573
DOI:10.1016/S0924-7963(02)00177-X