Changes between Version 1 and Version 2 of WRf4GPreprocessor


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Timestamp:
Apr 30, 2013 4:46:48 PM (9 years ago)
Author:
MarkelGarcia
Comment:

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  • WRf4GPreprocessor

    v1 v2  
    44
    55Before the WRF Preprocessor System (WPS) runs, input data files need to be in a specific format, so ungrib.exe does is able to parse them. Specifically, files in [http://www.wmo.int/pages/prog/www/WDM/Guides/Guide-binary-2.html GRIB ] format are needed. Furthermore, to WRF be able to run, there are some mandatory fields that must be present in the input files. Some of these are not always available in the driving model data we want to use, such as soil temperature and moisture content. In addition, we need these variables with the frequency that WRF is going to use to update its boundary data (usually 6 hours).
     6
     7Thus, in many cases input data available in some online server to be preprocessed. This process could be carried out offline, transforming the whole downloaded dataset before using it. However, integrating it in the WRF4G workflow enables the user to download and preprocess the input data locally in any of the grid nodes. The program or script that performs this process in called "preprocessor".
     8
     9As mentioned, the preprocessor is called before the WPS in each chunk. It must be an executable file that can be written in any language, provided it does accept 3 arguments: