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Hyperspectral radiometric observation of the northeast Arabians Sea during April 2006

DRS at CSIR-National Institute of Oceanography

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Title Hyperspectral radiometric observation of the northeast Arabians Sea during April 2006
 
Creator Sarangi, R.K.
Singh, S.
Dwivedi, R.M.
Matondkar, S.G.P.
 
Subject Algal blooms
Spectral composition
Upwelling
Downwelling
 
Description Parameters were retrieved from the hyperspectral radiometer like upwelling and downwelling radiance (Lu and Ed) upwelling and downwelling attenuation (K-Lu and K-Ed) for 9 stations in the northeast Arabian Sea between 16-26 April 2006. Data was analyzed for 5 offshore and 4 coastal stations of the cruise SS-244, on board FORV 'Sagar Sampada' between latitude 9-22 degrees N and longitude 68-74 degrees E. The peak for all parameters was observed to be different respectively for depths 1, 5, 10, 20, 30, 40, 50 meters in coastal and offshore stations. Each peak in the respective wavelength is due to a particular composition; phytoplankton pigments have spectral peaks at 443, 490, 555, 670 nm, suspended matter, sediments have peaks at 630 and 670 nm. Detailed analysis with High Performance Liquid Chromatography (HPLC) data and comparison with the water composition of hyperspectral radiometer results show that the marine cyanophyte, Trichodesmium bloom produces high pigment concentrations of chlorophyll-a, zeaxanthin, beta-carotene and pheophytin and their absorptions are interpreted at wavelengths 443, 490, 515 and 536 nanometers, respectively. A dip around 515 nm was seen in the Ed and Lu profiles in our study
 
Date 2008-10-17T15:04:55Z
2008-10-17T15:04:55Z
2008
 
Type Journal Article
 
Identifier Photonirvachak, Vol.36; 13-25p.
http://drs.nio.org/drs/handle/2264/1464
 
Language en
 
Rights 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 The Indian Society of Remote Sensing