Summary of Abstract Submission

Abstract Submission No. IO50-10-0010PresentationOral


P V Nagamani*1, T Preethi Latha1, K Hanumantha Rao1, Joaquim I Goes2, S B Choudhury1, E Amminedu3, C B S Dutt1, V K Dadhwal1

1 National Remote Sensing Center, ISRO, India
2 Lamont Doherty Earth Observatory, Columbia University, New York, USA
3 College of Engineering , Andhra University, Visakhapatnam, India


The Bay of Bengal witnessed a very severe Cyclonic Storm HUD-HUD in Oct. 2014. The storm originated from a low pressure area adjoining North Andaman Sea on 7th Oct, 2014 and moved northwest crossing the coast of Visakhapatnam, Andhra Pradesh on 14th Oct. 2014.The impact of this cyclonic storm on surface chlorophyll concentrations was assessed using Oceansat-2 Ocean Colour Monitor (OCM) and MODerate resolution Imaging Spectro radiometer-Aqua (MODIS-A) data. Offshore, average surface chlorophyll concentrations along the track of the cyclone increased from ~ 0.6 mg/m3 to ~ 2.0 mg/m3 following passage of the storm. In the coastal waters where the cyclone made landfall, a significant enhancement of chlorophyll of ~ 3.5 to 5.0 mg/m3 extending over a period of six days was observed. Increases in chlorophyll, offshore and in the coastal waters were associated with significant (~1.20C) reductions in sea surface temperature as seen in AVHRR imagery. The bio-physical mechanisms of chlorophyll increase associated with the cyclone HUD-HUD and the implications of cyclones in general for biological productivity in the Bay of Bengal will be discussed.