| | 79 | In this example, the publicly available NCEP Reanalysis data are going to be used. This data can be dowloaded from [http://nomad3.ncep.noaa.gov/pub/reanalysis-1/6hr] in GRIB format. These are monthly files that get updated each month nearly in real time. Two files are needed for each month, one with the pressure level data, labeled "pbg", and other one with 2D data, labeled "grb2d". extdata_path defined in experiment.wrf4g must pint to the folder where these files are located. Alternatively, it is possible to write a [wiki:WRF4G/WRF4GPreprocessor preprocessor] that downloads the data itself. Note that the file names must be parsed by the [wiki:WRF4G/WRF4GPreprocessor preprocessor]. In this case, if both files are located into the same folder, the default [wiki:WRF4G/WRF4GPreprocessor preprocessor] will parse them correctly, since it looks for monthly files with year/month (YYYY/mm) into their names. |
