Flow chart of flux coupler. 

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... of waves and currents during the Thane cyclone have been explained with dynamical parallel coupling of ADCIRC-SWAN model by exchanging momentum and radiation stress [2]. In the present study, the coupling algorithm acts as an interface between two independent state- of-art models i.e. atmosphere and ocean. It calculates the momentum and heat fluxes from the atmosphere (WRF) model and then transfer to the ocean model (POM). It makes the optimal interpolation of data to provide the specified grid resolution to the ocean model. The atmosphere parameters like wind speed and radiation fluxes (latent heat, sensible heat, longwave radiation and shortwave radiation) and ocean parameter like sea surface temperature are extracted from the WRF and POM models respectively. These parameters are used to study their effect on the coastal processes, coastal activity like thermal water dispersion from outfall location of nuclear plants and circulation features along the Kalpakkam coast. The accuracy of the flux coupling algorithm is tested with available observational data. It has been used as an application for the development of a regional scale coupled modelling system for the Kalpakkam region. The FCTK has a flux coupling algorithm to combine the atmosphere and ocean models and to supply the data for surface forcing and lateral boundary conditions (Fig. 1). The flux coupling algorithm is used to calculate momentum and heat fluxes by utilizing bulk aerodynamic formulations. The momentum and heat fluxes play a crucial role at the interface to couple the atmosphere and ocean and these two quantities govern the exchange of energy between these two systems. The algorithm of flux coupler has been attached in the appendix. The momentum flux is a major driving force for the ocean basin scale circulation [3] and [4] while the heat flux is important to determine thermal properties of the upper ocean. Both contribute towards turbulence mixing within the oceanic surface mixed layer; therefore both these fluxes are pre- requisites for the prediction of SST variability. The momentum flux is calculated from the zonal and meridional wind components from WRF model output by using the ...