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- W2373485944 abstract "Since the topography distribution of China is very complex, there exists elevation difference between surface observation station measurement and numerical model surface. The surface observation data are currently only used as backup or process analysis, but not used in numerical models sufficiently. Reasonable assimilation schemes of surface observation data will put these data into numerical models sufficiently. In this paper, surface observation data are assimilated into Meso-scale model MM5 based on the similarity theory, using MM5_3DVAR (MM5 three-dimensional variational) system. In order to make clear whether the actual elevation difference between observation site and numerical model surface should be put into consideration in directly assimilating surface observation data, some experiments are performed with surface observation data and radiosonde data. Results show that 3DVAR assimilation of surface observation data can impact mesoscale model analysis and forecast. 3DVAR assimilation of each observed surface meteorological parameter can influence the numerical forecast of 24 h rainfall and the effects of different observed surface meteorological parameter assimilation are different. The surface temperature assimilation brings the maximum contribution to the rainfall forecast, followed by the surface moisture. The surface temperature assimilation brings much more contribution to temperature and pressure analysis. The actual difference in elevation between the observation site and the model surface must be put into consideration in the surface observation data assimilation scheme. Better results will be obtained when surface observation data are assimilated into the numerical model where the difference in elevation between observation site and numerical model surface is put into consideration." @default.
- W2373485944 created "2016-06-24" @default.
- W2373485944 creator A5042835608 @default.
- W2373485944 date "2007-01-01" @default.
- W2373485944 modified "2023-09-23" @default.
- W2373485944 title "A Study of Assimilation of Surface Observational Data in Complex Terrain Part I: Influence of the Elevation Difference Between Model Surface and Observation Site" @default.
- W2373485944 hasPublicationYear "2007" @default.
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