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Preprocessing for VPRM calculation inside WRF

Preprocessing for VPRM calculation inside WRF. Contents. What is it? What have we done? How is the status? Future Work?. What is it?. VPRM = Vegetation Photosynthesis and Respiration Model WRF = Weather Research and Forecasting Model

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Preprocessing for VPRM calculation inside WRF

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  1. Preprocessing for VPRM calculation inside WRF

  2. Contents • What is it? • What have we done? • How is the status? • Future Work?

  3. What is it? • VPRM = Vegetation Photosynthesis and Respiration Model • WRF = Weather Research and Forecasting Model • To models coupled to obtain proper results for our simulation • Input MODIS satellite data • Needs preparation: done by a Preprocessor • Mainly a R-Script, with some BASH and Tcl parts • Preprocessed data goes into VPRM calculation • Results of this calculation goes into WRF simulation

  4. What have we done? • In the past: • preprocessing was not fully automated; parameters had to be adjusted manually according to WRF namelist etc. • Two runs of WRF where necessary: a) VPRM processing; b) the actual simulation using VPRM data from first run • Now: • fully automated preprocessing for one year, e.g. 2005 • Input for preprocessing is the WRF namelist • Only one run of WRF necessary, since VPRM processing was included into WRF by Ravan

  5. How is the status? Functional but not optimized R code, intermediate results are thrown away, slow R loops

  6. How is the status? Output in netcdf files, format is the same as WRF netcdf files

  7. Future work? • Optimization, faster C or Fortran procedures, e.g. loops in C • Input satellite data now downloaded when needed • In future data is in a separate folder which user has to provide and is not the working directory • Intermediate data shall be saved in special folder structure

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