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Ocean-biogeochemistry in an atmospheric input perspective

Oceans are the basis of life. It is major source of oxygen and are also a reservoir for Carbon Dioxide. Ocean form 70 % of the earth. While earth comprises of Hydrosphere, Atmosphere, Biosphere and Geosphere, Atmosphere and Ocean are of major importance.

Ocean together with atmosphere gives rise to air sea interactions which causes weather and climate. These climatic aspects not only refers to physical ones, but also the biological ones. We are all very much aware of the climate change and the associated changes in the physical parameters (eg SST increase, sea level rise).

It is also important to consider the effect of anthropogenic activities which also affects marine and coastal ecosystems. Through my research I look into the effects of atmopsheric pollution on the oceanic biogeochemistry.

I would be making use of coupled ocean atmospheric chemistry ocean biogeochemistry model for this purpose to incorporate the effects of atmospheric chemistry on the ocean biogeochemistry.


• To identify the general trend of Chlorophyll in North Indian Ocean and some special cases such as Cyclones using satellite derived datasets and estimate the same using ROMS-BGC model.
• To estimate the trend of chlorophyll in the coupled models with and without chemistry input from Atmospheric Model

• To estimate the Net Primary Productivity in NIO using the satellite measurements and also from the model simulated Chlorophyll.

• To estimate the Nitrate cycling using coupled model.


• It helps to understand the impact of pollution on the marine ecosystems which is also the effect of anthropogenic activities and long term climate change


• Sunanda N, Kuttippurath J, Peter R, Chakraborty K and Chakraborty A (2021) Long-Term Trends and Impact of SARS-CoV-2 COVID-19 Lockdown on the Primary Productivity of the North Indian Ocean. Front. Mar. Sci. 8:669415. doi: 10.3389/fmars.2021.669415

• Peter, R., Kuttippurath, J., Chakraborty, K. & Sunanda, N. (2021), Temporal evolution of mid-tropospheric CO 2 over the Indian Ocean. Atmos. Environ. 257, 118475.

• Kuttippurath, J., Sunanda, N., Martin, M. V., & Chakraborty, K. (2021). Tropical storms trigger phytoplankton blooms in the deserts of north Indian Ocean. npj Climate and Atmospheric Science, 4(1), 1-12.,



•Sunanda N. and Kuttippurath, J.: Role of eddies on tropical cyclone induced phytoplankton blooms in North Indian Ocean. International Symposium on Tropical Meteorology, “Changing Climate: Consequences and Challenges (INTROMET-C4)”, November 23–26, 2021.

•Sunanda, N and Kuttippurath, J.: The Relationship between Aerosols and Chlorophyll -a in the North Indian Ocean, International Conference on Frontiers in Marine Science Challenges and Prospects (MARICON), December 16-20, 2019

•Akhila, R., Sunanda, N., A. Chakraborty., and J. Kuttippurath: Cooling of Bay of Bengal surface temperature during the passage of the cyclones Aila, Bijli and Ward, International conference on SONAR Systems and Sensors, ICONS 2018, 22–24 February 2018.

•Sunanda, N., AKhila, R., A. Chakraborty and J. Kuttippurath: The Chl-a bloom in Bay of Bengal during the cyclones Fanoos, Nisha and Nilam, International conference on SONAR Systems and Sensors, ICONS 2018, 22–24 February 2018.

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