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Coupled WRF-GCE-LIS
The WRF is a next-generation mesoscale forecast model and assimilation
system that will be used to advance the understanding and the prediction
of mesoscale precipitation systems. It consists of four primary subsystems,
(1) WRF Standard Initialization (WRFSI), (2) WRF Variational Data assimilation
system (WRF-Var), (3) Advanced Research WRF (ARW) dynamic solver, (4)
Numerous physics packages contributed by research community. The
WRF model will be used for a wide range of applications, from idealized
research to operational forecasting, with an emphasis on horizontal
grid sizes in the range of 1-10 km. WRF can resolve the small-scale
weather features such as front, localized convection, hurricane core,
and topographic effect much better than the global model.
At Goddard, the modeling and dynamic group has implement several ice
schemes (Tao et al. 2003), and Goddard Land Information System (LIS)
(including the CLM and NOAH land surface models) into WRF V2.2. The
Goddard radiation (including explicitly calculated cloud optical properties
and other aerosols that are important for direct effect) will be implemented
into WRF by Spring 2006. WRF can also be initialized with the Goddard
Earth Observing System (GEOS) global analyses. This link between
the GEOS global analyses and the WRF models could allow for many useful
regional modeling applications. For example, a series of WRF simulations
will be conducted to test the sensitivity of the initial and boundary
conditions derived from NCEP, ECMWF, and GEOS on precipitation over
different geographic locations. |
