Regional Climate Model (RCM-SEEVCCC)

Model description

RCM-SEEVCCC is a two-way regional coupled model, with Eta/NCEP limited area model as its atmospheric part and Princeton Ocean Model as its ocean part. Both models are well known and have been extensively verified. Exchange of atmospheric fluxes and SST (Sea Surface Temperature) is performed at every atmospheric physics time step (order of minutes). Exchanged fluxes are calculated without any additional parametrization.

The atmospheric component is a limited-area forecast model defined on the E-grid according to the nomenclature of Arakawa and Wininghoff  and with eta vertical coordinate. Its dynamic core has an efficient time-stepping, with a short time-step for the forward-backward gravity wave scheme modified so as to address the E-grid’s lattice separation problem, a longer time step for its conservative advection schemes, and a still longer time step for the physics terms. The physics package consists of NOAH land surface scheme, a Goddard radiation scheme, Mellor-Yamada-Janjic turbulence scheme, Monin-Obukhov PBL scheme with viscous sub-layer and a Betts-Miller-Janjic convection parametrization.

POM is a three-dimensional, primitive equation, numerical model. Its horizontal grid uses curvilinear orthogonal coordinates on a C-grid, and its vertical coordinate is a sigma coordinate. The model has efficient time differencing, which is explicit in horizontal and implicit in vertical. It has a free surface, complete thermodynamics, and second order turbulence closure. Advection schemes use the finite volume approach, which is particularly suitable when using curvilinear orthogonal coordinates.

RCM-SEEVCCC – runs

Model has been used for:
● Seasonal forecast
● Climate projections

References

Djurdjevic V. and Rajkovic, B. (2008), Verification of a coupled atmosphere-ocean model using satellite observations over the Adriatic Sea, Annales Geophysicae,  26(7): 1935-1954.
Djurdjevic, V. and Rajkovic, B. (2010), Development of the EBU-POM coupled regional climate model and results from climate change experiments, In: Advances in Environmental Modeling and Measurements, Editors: T. D. Mihajlovic and Lalic B., Nova Publishers.