OCEAN DYNAMICAL DOWNSCALING OF HADGEM2-ES IN THE TROPICAL ATLANTIC

The Intergovernmental Panel of Climate Change joined efforts with several institutions in different countries to devise strategies to understand how the environment respond to climate change. They developed models that simulate past, present and future climate on a global basis. The grid resolution of these models is quite low, and for this reason some regional processes are not represented. So, for some local studies the grid resolution is increased with downscaling processes. Here, a dynamical downscaling was applied on a tropical Atlantic domain, using HadGEM2-ES outputs as forcing, initial conditions and lateral boundary inputs in a regional model. The regional model used to solve the hydrodynamic equations was ROMS. The outputs were evaluated comparing with remote sensing products, and the result was satisfactory. This technique helped to improve the grid resolution, allowing the visualization of regional ocean processes but reported errors in the equatorial Atlantic persist.