Implementation of Phase Domain Decomposition Parallel Algorithm of Three-Dimensional Variational Data Assimilation

The principles of 3DVAR(three-dimensional variational) data assimilation of meteorological observations are introduced, and parallel strategies of 3DVAR systems, such as phase domain decomposition, loading balance and message communication, etc. are studied. Based on the SPMD programming model and a message passing interface, the 3DVAR parallel program, is designed and implemented, and some analysis of the results are finally presented.