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Lithogenic fluxes to the northern Indian Ocean - An overview

DRS at CSIR-National Institute of Oceanography

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Title Lithogenic fluxes to the northern Indian Ocean - An overview
 
Creator Ramaswamy, V.
 
Subject lithogenesos
sediment traps
seasonality
ealian dust
biomass
holocene
sedimentation
 
Description Lithogenic fluxes to the northern Indian Ocean, measurEd. by time-series sediment traps, exhibit a strong seasonality with the bulk of the material (40 to 80 %) being deposited during the southwest monsoon period. This seasonality is more pronounced in the Arabian Sea than in the Bay of Bengal. The western and central Arabian Sea receive predominantly eolian dust from the Somali-Arabian deserts while the eastern Arabian Sea and the Bay of Bengal receive mostly fluvial material from the rivers draining the Himalayas and the Indian Peninsula. Annual lithogenic fluxes in the Bay of Bengal (8.6 to 28.0 gm sup(-2)) are about five times that of the Arabian Sea (2.6 to 5.4 gm sup(-2)). Increase of lithogenic flux with depth is seen in areas where fluvial input is more due to scavenging of the standing stock of suspended matter by sinking biogenic aggregates. In areas where eolian sediments predominate there is no significant increase of lithogenic flux with depth. Trap fluxes are comparable to Holocene sedimentation rates only in the Arabian Sea and the offset between the two is less than a factor of 2. In the central and southern Bay of Bengal trap fluxes are higher by a factor of 5
 
Date 2009-05-06T10:47:06Z
2009-05-06T10:47:06Z
1993
 
Type Book Chapter
 
Identifier Monsoon biogeochemistry, Ed. by: Ittekkot, V.; Nair, R.R. 97-111p.
http://drs.nio.org/drs/handle/2264/2850
 
Language en
 
Rights Copyright [1993]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher University of Hamburg, Germany