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1.2.4.4 Meteorology Options.

     The Short Term model can utilize the unformatted, sequential files of meteorological data generated by the PCRAMMET and the MPRM preprocessors, provided the data file was generated by the same Fortran compiler as was used for the model, and provided the deposition algorithms are not being used.  The meteorology options for the deposition algorithms in the ISC models are described later in this section. 

     The user also has considerable flexibility to utilize formatted ASCII files that contain sequential hourly records of meteorological variables.  For these hourly ASCII files, the user may use a default ASCII format, may specify the ASCII read format, or may select free‑formatted reads for inputting the meteorological data.  A utility program called BINTOASC is provided with the ISC models to convert unformatted meteorological data files of several types to the default ASCII format used by ISCST and ISCEV.  This greatly improves the portability of applications to different computer systems.  The BINTOASC program is described in Appendix C.  The model will process all available meteorological  data in the specified input file by default, but the user can easily specify selected days or ranges of days to process.

     The Short Term model includes a dry deposition algorithm and a wet deposition algorithm.  The dry deposition algorithm requires additional meteorological input variables, such as Monin-Obukhov length and surface friction velocity, that are provided by the PCRAMMET and MPRM preprocessor.  The wet deposition algorithm in the Short Term model also needs precipitation data, which is optionally available in the PCRAMMET preprocessed data.  When using the dry deposition or wet deposition algorithms in ISCST, the meteorological data must be a formatted ASCII file.

 

 

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