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Basin scale distribution of Trichodesmium spp. in the Arabian Sea using Oceansat I/ OCM

DRS at CSIR-National Institute of Oceanography

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Title Basin scale distribution of Trichodesmium spp. in the Arabian Sea using Oceansat I/ OCM
 
Creator Matondkar, S.G.P.
Parab, S.G.
Desa, E.
Dwivedi, R.M.
 
Subject Ocean colour monitor
Remote sensing
 
Description Trichodesmium spp. is widely spread in the Arabian Sea. It form dense patches. During 2000-2005 (5 years period) extensive sampling was done in the Arabian Sea covering large area and different months starting from November to May. Three prominent sites are identified as Trichodesmium bloom sites in the Arabian Sea: 1) Lakshadweep waters 2) Off Goa and 3) Off Gujarat area. Bloom of around 100 km2 area with 4 to 400737 filamentsL-1 concentrations are recorded. Two species of Trichodesmium are encountered based upon seasonality and environmental conditions. OCM derived chlorophyll a during bloom was as high as 0.5 to 1 mgm-3, at time increased upto 5 mgm-3 and depends upon number of filaments in water. The Trichodesmium features were identified at 869, 670, 555nm in OCM data. Trichodesmium was detected as stripes and eddies in OCM images. The bloom patches appear darker which is taken as measurement of spread of the bloom in water. Total 133 stations are covered during 5 years period out of which 63 stations showed presence of Trichodesmium with discolouration of water. In offshore water Trichodesmium was detected as early as November and continued upto April month whereas in the coastal water Trichodesmium prevailed from February to May. The seasonality of these blooms was observed with respect to inshore/offshore and two species of Trichodesmium is discussed with the help of OCM data processed for chlorophyll a during Trichodesmium growth period, at 3 identified sites in the Arabian Sea.
 
Date 2007-04-14T09:15:37Z
2007-04-14T09:15:37Z
2006
 
Type Journal Article
 
Identifier Proceedings of SPIE, vol.6404, 64060V
http://drs.nio.org/drs/handle/2264/586
 
Language en
 
Rights Copyright 2006 Society of Photo-Optical Instrumentation Engineers. This paper was (will be) published in [Proc. of SPIE Vol. 6404, 64060V] and is made available as an electronic reprint (preprint) with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
 
Format 760611 bytes
application/pdf
 
Publisher Society of Photo-Optical Instrumentation Engineers