J. Earth Syst. Sci. (2021) 130:157 Ó Indian Academy of Sciences https://doi.org/10.1007/s12040-021-01668-1 (0123456789().,-volV)(0123456789().,-volV) Chlorophyll-a, SST and particulate organic carbon in response to the cyclone Amphan in the Bay of Bengal 1, 2 1 MD RONY GOLDER * ,MD SHAHIN HOSSAIN SHUVA ,MUHAMMAD ABDUR ROUF , 2 3 MOHAMMAD MUSLEM UDDIN ,SAYEDA KAMRUNNAHAR BRISTY and 1 JOYANTA BIR 1Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna 9208, Bangladesh. 2Department of Oceanography, University of Chittagong, Chittagong 4331, Bangladesh. 3Development Studies Discipline, Khulna University, Khulna 9208, Bangladesh. *Corresponding author. e-mail:
[email protected] MS received 11 November 2020; revised 20 April 2021; accepted 24 April 2021 This study aims to explore the variation of Chlorophyll-a (Chl-a), particulate organic carbon (POC) and sea surface temperature (SST) before (pre-cyclone) and after (post-cyclone) the cyclone Amphan in the Bay of Bengal (BoB). Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua satellite level-3 data were used to assess the variability of the mentioned parameters. Chl-a concentration was observed to be significantly (t = À3.16, df & 18.03, p = 0.005) high (peak 2.30 mg/m3) during the post-cyclone period compared to the pre-cyclone (0.19 mg/m3). Similarly, POC concentration was significantly (t = 3.41, df & 18.06, p = 0.003) high (peak 464 mg/m3) during the post-cyclone compared to the pre-cyclone (59.40 mg/m3). Comparatively, high SST was observed during the pre-cyclone period and decreases drastically with a significant difference (t = 14, df = 33, p = 1.951e-15) after the post-cyclone period.