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Enhanced export of carbon by salps during the northeast monsoon period in the northern Arabian Sea

DRS at CSIR-National Institute of Oceanography

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Title Enhanced export of carbon by salps during the northeast monsoon period in the northern Arabian Sea
 
Creator Ramaswamy, V.
Sarin, M.M.
Rengarajan, R.
 
Subject biogeochemical cycle
sediment traps
carbon
thorium isotopes
monsoons
water column
faecal pellets
particulate matter
particulate organic carbon
euphotic zone
 
Description A drifting sediment trap was deployed and sup(234)Th activity in the water column was measured to calculate export flux of carbon at a time-series station in the northern Arabian Sea (lat. 21 degrees 30 minutes N; long. 64 degrees 00 minutes E) during the winter monsoon, 10-23 February 1997. The sampling period was characterised by an extensive salp swarm, and salp faecal pellets were the dominant contributors to the particulate matter in the sediment traps. Average sup(234)Th flux out of the photic zone was 2300 dpm m sup(-2) d sup(-1) and average POC/ sup(234)Th ratio in trap-derived particles was 0.14 mg/dpm. Average sup(234)Th derived export flux of carbon was about 332 mg m sup(-2) d sup(-1), representing 36% of the daily primary production (PP) (925 mg C m sup(-2) d sup(-1)). Export of about one-third of the daily PP during the end of the winter monsoon could be due to the episodic nature of salp swarms. Salp swarms are frequently observed in the Arabian Sea and may be a significant pathway for rapid export of carbon from the euphotic zone.
 
Date 2008-02-22T05:30:10Z
2008-02-22T05:30:10Z
2005
 
Type Journal Article
 
Identifier Deep-sea research. Part II. Topical studies in oceanography, Vol.52; 1922-1929p.
http://drs.nio.org/drs/handle/2264/933
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Elsevier