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K Maneesha
Articles written in Journal of Earth System Science
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Volume 120 Issue 4 August 2011 pp 773-782
Meso-scale atmospheric events promote phytoplankton blooms in the coastal Bay of Bengal
K Maneesha V V S S Sarma N P C Reddy Y Sadhuram T V Ramana Murty V V Sarma M Dileep Kumar
The Bay of Bengal is considered to be a low productive region compared to the Arabian Sea based on conventional seasonal observations. Such seasonal observations are not representative of a calendar year since the conventional approach might miss episodic high productive events associated with extreme atmospheric processes. We examined here the influence of extreme atmospheric events, such as heavy rainfall and cyclone
Sidr , on phytoplankton biomass in the western Bay of Bengal using bothin situ time-series observations and satellite derived Chlorophyll 𝑎 (Chl 𝑎) and sea surface temperature (SST). Supply of nutrients through the runoff driven by episodic heavy rainfall (234 mm) on 4–5 October 2007 caused an increase in Chl 𝑎 concentration by four times than the previous in the coastal Bay was observed within two weeks. Similar increase in Chl 𝑎, by 3 to 10 times, was observed on the right side of the cycloneSidr track in the central Bay of Bengal after the cycloneSidr . These two episodic events caused phytoplankton blooms in the western Bay of Bengal which enhanced ∼40% of fishery production during October–December 2007 compared to that in the same period in 2006.
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Journal of Earth System Science
Volume 132, 2023
All articles
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Posted on July 18, 2023
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