Impact of Cyclone PHAILIN on Chlorophyll-a Concentration and Productivity in the Bay of BengalReport as inadecuate




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Ocean colour remotesensing is one of the conventional methods in satellite oceanography used tostudy the biological response ofthe upper ocean to the tropical cyclones. This paper aims to study the impactof the Very Severe Cyclonic storm PHAILIN, and its consequence on the surfacechlorophyll-aconcentration distribution in the Bay of Bengal usingOceansat-2 Ocean Colour Monitor OCM. The impact of this cyclone on oceanprimary productivity has been studied using MODIS-A data. Sea surfacetemperature SST plays an important role in the generation of primaryproductivity along with the other oceanographic parameters; SST patterns in theBay of Bengal during the cyclone period were studied. From the analysis, it isobserved that the chlorophyll-aconcentration has increased from 1.08before to 7.06 mg-m3 afterthe cyclone with an SST drop of ~3°C 29.19°C to 26°C. The primaryproductivity has increased from 410.0506to 779.9814 mg-C-m2-day after the cyclone. In addition to the aboveanalysis, an attempt has also been made to study the impact of cycloneintensity on the chlorophyll concentration. The study shows that the comparisonbetween cyclone intensity CI and chlorophyll concentration shows a positiverelationship.

KEYWORDS

Oceansat-2 OCM, Cyclone, Chlorophyll-a, Primary Productivity, Cyclone Intensity, SST

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Latha, T. , Rao, K. , Nagamani, P. , Amminedu, E. , Choudhury, S. , Dutt, C. and Dadhwal, V. 2015 Impact of Cyclone PHAILIN on Chlorophyll-a Concentration and Productivity in the Bay of Bengal. International Journal of Geosciences, 6, 473-480. doi: 10.4236-ijg.2015.65037.





Author: T. Preethi Latha1, K. H. Rao1, P. V. Nagamani1, E. Amminedu2, S. B. Choudhury1, C. B. S. Dutt1, V. K. Dadhwal1

Source: http://www.scirp.org/



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