Is Cyclone JAL Stimulated Chlorophyll-A Enhancement Increased Over the Bay of Bengal

Muni Krishna K and Manjunatha B
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Muni Krishna K: Department of Meteorology and Oceanography, Andhra University, India
Manjunatha B: Department of Marine Geology, Mangalore University, India

Oceanography & Fisheries Open Access Journal, 2019, vol. 10, issue 5, 135-138

Abstract: Tropical cyclone JAL developed in the south Bay of Bengal and worn south coastal Andhra Pradesh on November 7, 2010. The main objective of this study was to investigate the ocean’s response before and after the passage of cyclone in the southern Bay by utilizing the multi-satellite approach. For this study, I used Sea Surface Temperature (SST), Chlorophyll-a (Chl-a), and Sea Surface Height (SSH) data production from different remote sensing satellites. JAL induced large scale of upwelling within large cooling of sea surface (~ 1.2°C), enhancement of Chl-a ~ 0.4 mg/m3 in the open ocean and 2-3mg/m3 along the coast, and decrease of SSH (~15cm) in the southeast Bay of Bengal after its passage. After the JAL, the upwelling area expanded rapidly on the shelf break. Chl-a images also revealed high values (~3.3mg/m3) appeared in the shelf region, where the high Chl-a patterns matched the upwelling in terms of location and time. Large offshore surface cooling was also observed mainly to the right of the cyclone track. From the above observations it is evident that cyclonic storm JAL significantly increased upwelling in the southern Bay of Bengal.

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Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:adp:jofoaj:v:10:y:2019:i:5:p:135-138

DOI: 10.19080/OFOAJ.2019.10.555800

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