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Increased particle fluxes at the INDEX site attributable to simulated benthic disturbance

DRS at CSIR-National Institute of Oceanography

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Title Increased particle fluxes at the INDEX site attributable to simulated benthic disturbance
 
Creator Parthiban, G.
 
Subject benthos
biogenic deposits
lithogenesis
sediment traps
time series
 
Description Particle fluxes were measured 7 m above the sea bottom during the predisturbance, disturbance, and postdisturbance periods by using time series sediment traps attached to seven deep-sea moorings deployed in the INDEX experiment site in the Central Indian Basin. The predisturbance particle fluxes varied between 22.3 to 55.1 mg m sup(-2) day sup(-1). Increased and variable particle fluxes were recorded by the sediment traps during the disturbance period. The increase observed was 0.5 to 4 times more than the background predisturbance fluxes. The increases in particle fluxes (approx. 4 times) recorded by the sediment trap located in the southwestern direction (DMS-1) were the greatest, which could be the result of preferential movement of resuspended particles generated during the deep-sea benthic disturbance along the general current direction prevailing in this area during the experimental period. Also, the traps located closer to the disturbance area recorded greater fluxes than did the traps far away, across the Deep Sea Sediment Resuspension System path. This variability in recorded particle fluxes by the traps around the disturbance area clearly indicates that physical characteristics such as grain size and density of the resuspended particles produced during the disturbance had an important effect on particle movement. The postdisturbance measurements during approx. 5 days showed a reduction in particle fluxes of approx. 50%, indicating rapid particle settlement
 
Date 2009-01-09T08:08:14Z
2009-01-09T08:08:14Z
2000
 
Type Journal Article
 
Identifier Marine Georesources and Geotechnology, Vol.18; 223-235p.
http://drs.nio.org/drs/handle/2264/1656
 
Language en
 
Rights Copyright [2000]. 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 Taylor and Francis