Development and application of CMA GRAPES model
system
Jiandong
Gong
Deputy Director of CMA NWP Center
1:30pm June 16 in Room 2155
Abstract:
The presentation will have an overview of CMA (China Meteorological
Administration) developed GRAPES (Global/Regional Assimilation
PrEdiction System) model and its application. It will mainly focus on
research and development efforts undertaken by CMA in past years. The
future development plan will be discussed as well.
The GRAPES is CMA developed unified model system that started since
1999. The GRAPES utilizes a common dynamic core with different
configurations of physics for different applications. It includes four
main components: variational data assimilation system, unified dynamic
core, physical parameterization schemes, and parallel computing. After
nearly 15-year development, GRAPES model systems are the main
components of CMA daily operational NWP system those include GRAPES
Mesoscale system (Meso), GRAPES Rapid Analysis and Forecast System
(RAFS), GRAPES TYphoon Model (TYM), GRAPES Regional Ensemble Prediction
System (REPS), and GRAPES_3DVAR. GRAPES Global Forecast System (GFS) is
on quasi-operational running. Currently, our research efforts are
focusing on 1). Higher resolution (0.25 degree 60 vertical model
levels) GFS model; 2). Global four dimensional variational data
assimilation system (4DVAR); 3). Global singular vector ensemble
prediction system (SV); 4). Global yin-yang grid GFS model (GRAPES YY),
and 5) Hybrid data assimilation development. In the near future, CMA
NWP operational system will be upgraded by all GRAPES based system.