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

S. G. Prabhu Matondkar; Sushma G. Parab; Elgar Desa; R. M. Dwivedi

doi:10.1117/12.693687

28 November 2006 Basin scale distribution of Trichodesmium spp. in the Arabian Sea using Oceansat I/OCM

S. G. Prabhu Matondkar, Sushma G. Parab, Elgar Desa, R. M. Dwivedi

Proceedings Volume 6406, Remote Sensing of the Marine Environment; 64060V (2006) https://doi.org/10.1117/12.693687
Event: SPIE Asia-Pacific Remote Sensing, 2006, Goa, India

Abstract

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.

Citation Download Citation

S. G. Prabhu Matondkar, Sushma G. Parab, Elgar Desa, and R. M. Dwivedi "Basin scale distribution of Trichodesmium spp. in the Arabian Sea using Oceansat I/OCM", Proc. SPIE 6406, Remote Sensing of the Marine Environment, 64060V (28 November 2006); https://doi.org/10.1117/12.693687

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available