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(As on Oct-2022 Dr. Anju has completed her thesis and got awarded Ph.D.)

Ms. Anju Mallissery is a Ph.D. student working on the Indian Ocean Ecosystem Modeling using NEMRUO Model. It is a model developed by the PISCES Task Team and named after the Japanese Island 'Nemuro' where the first meeting is held. NEMURO is a 15 component ecosystem and biogeochemistry model used to study regional oceanography. NEMURO model, for the first time, has been adapted to the Indian Ocean environment. In her research, she has coupled NEMURO with a 1-D mixed layer model based on Mellor and Yamada (1982) and simulated for the Arabian Sea along few Bio-Argo tracks. The model simulations show that NEMURO successfully captures the sub-surface chlorophyll maximum, as observed in the Argo tracks. Further using this Model, she has investigated the role of silicate versus nitrate limitation in Indian Ocean productivity. She has found that during April and May, the western part of Arabian Sea productivity is limited by nutrients as compared to silicate. In the subsurface ocean, silicate is the critical limiting factor.

Ms. Anju Mallissery has also developed a Numerical Code of Bioenergetic Model for Indian Ocean Oil-Sardines. This model combines the outputs from NEMURO and fed to the code which finds the balance of Bioenergy and track the growth of individual Fish (oil-Sardines in this case). The model is successful in capturing the seasonal growth rate of the oil-sardines in the east coast of the Arabian Sea when compared with the observations. The details of the results are published here.

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