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Fluxes of material in the Arabian Sea and Bay of Bengal - Sediment trap studies

DRS at CSIR-National Institute of Oceanography

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Title Fluxes of material in the Arabian Sea and Bay of Bengal - Sediment trap studies
 
Creator Ramaswamy, V.
Nair, R.R.
 
Contributor Lal, D.
 
Subject Geology and Geophysics
particulate flux
approximation
sediment traps
time series analysis
monsoons
annual variations
ISW, Arabian Sea
ISW, Bengal Bay
 
Description Special Issue: Biogeochemistry of the Arabian Sea: Present information and gaps
In order to investigate how monsoons influence biogeochemical fluxes in the ocean, twelve time-series sediment traps were deployed at six locations in the northern Indian Ocean. In this paper we present particle flux data collected during May 1986 to November 1991 and November 1987 to November 1992 in the Arabian Sea and Bay of Bengal respectively. Particle fluxes were high during both the SW and NE monsoons in the Arabian Sea as well as in the Bay of Bengal. The mechanisms of particle production and transport, however, differ in both the regions. In the Arabian Sea, average annual fluxes are over 50 g m@u-2@@ y@u-1@@ in the western Arabian Sea and less than 27 g m@u-2@@ y@u-1@@ in the central part. Biogenic matter is dominant at sites located near upwelling centers, and is less degraded during peak flux periods. High particle fluxes in the offshore areas of the Arabian Sea are caused by injection of nutrients into the euphotic zone due to wind-induced mixed layer deepening. In the Bay of Bengal, average annual fluxes are highest in the central Bay of Bengal (over 50 g m@u-2@@ y@u-1@@) and are least in the southern part of the Bay (37 g m@u-2@@ y@u-1@@). Particle flux patterns coincide with freshwater discharge patterns of the Ganges-Brahmaputra river system. Opal/carbonate and organic carbon/carbonate carbon ratios increase during the SW monsoon due to variations in salinity and productivity patterns in the surface waters as a result of increased freshwater and nutrient input from rivers
 
Date 1995-01-17T10:06:29Z
2017-09-30T01:55:41Z
1995-01-17T10:06:29Z
2017-09-30T01:55:41Z
1994
 
Type Journal Article
 
Identifier Proceedings of the Indian Academy of Sciences (Earth and Planetary Sciences), vol.103(2); 1994; 189-210
0253-4126
http://drs.nio.org/drs/handle/2264/7367
 
Language en
 
Relation P Indian As-Earth
SCI
 
Publisher Indian Academy of Sciences, Bangalore