How does the Niger river warm coastal waters in the northern Gulf of Guinea?

To highlight the processes by which Niger River warms coastal waters in eastern part of northern Gulf Guinea upwelling, two simulations NEMO model at high resolution were used over period 2010 - 2017. The first simulation is realistic while second a effects are not taken into account. step was to evaluate outputs models, using satellite products and situ observations. average states Sea Surface Temperature, Salinity, Height, zonal current vertical profiles temperature salinity showed ability reproduce correctly physical characteristics study area. analysis heat balance terms that diffusion meridional advection causes warming induced River. stratification shear horizontal currents reveal river acts inhibiting upwelling cold water diffusion. reinforces prevents shearing bottom mixed layer.