Record Details

Sedimentation

DRS at CSIR-National Institute of Oceanography

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Field Value
 
Title Sedimentation
 
Creator Rixen, T.
Guptha, M.V.S.
Ittekkot, V.
 
Subject sedimentation
mixed layer depth
euphotic zone
plankton
biomass
carbon dioxide
continental margins
spreading centres
monsoons
 
Description The Monsoonal impact on the deep ocean fluxes, organic carbon export into the ocean's interior, and the difference between the deep-sea organic carbon fluxes and sedimentary organic carbon burial rates in the Arabian Sea were assessed. The variations of the depth of the mixed layer and the euphotic zone control the organic carbon export in the Arabian Sea except in regions influenced by upwelling during the SW Monsoon. The strength of the upwelling and the height of the subsequent export of organic matter are mainly determined by the intensity of the Findlater Jet. Moreover, the strength of the physical forcing mechanism, also influences the plankton composition whereby stronger forcing favours diatom blooms and lowers the carbonate/ biogenic opal ratios. Such changes are assumed to have lowered the atmospheric CO sub(2) concentration significantly during glacial times. The differences between estimated deep ocean fluxes derived from satellite data and measured deep fluxes are lower than by a factor two in Arabian Sea. The organic carbon burial rates in Arabian Sea related to primary production and carbonate accumulation reveal an acceptable agreement on a global scale except at sea floor spreading zones and continental margins.
 
Date 2008-08-06T05:51:58Z
2008-08-06T05:51:58Z
2002
 
Type Book Chapter
 
Identifier Section 2.9. Report of the Indian Ocean Synthesis Group on the Arabian Sea process study. Ed. by: Watts, L.; Burkill, P.; Smith, S.(JGOFS Rep.; 35); 65-73p.
http://drs.nio.org/drs/handle/2264/1373
 
Language en
 
Publisher JGOFS International Project Office, University of Bergen, Norway