## Meteorology / Convert to ARL / MCIP IOAPI

This menu calls a utility program to convert meteorological data files created by MCIP for the CMAQ model. The data files follow a specific naming convention and may contain multiple variables and time periods. They are in the IOAPI format. The conversion program is currently only available on UNIX or LINUX systems and will convert all the required fields in one pass for all available time periods. The data from multiple input files, say each file contains one day, may be appended automatically by setting the append file name to a non-null string. If there are time period overlaps between input files, it is best not to append them, but to select multiple input files when running HYSPLIT.

There are three required MCIP input meteorological data files: METCRO3D_, METDOT3D_, METCRO2D_, and one file, GRIDDOT2D_ that gives the grid information. All data values are interpolated to the dot grid. In the GUI, only one input file needs to be selected and the conversion program uses the file suffix and the standard naming convention to determine the names of the other files to open. Due to file name character length restrictions, the directory information is removed and all the input files should be in the local working directory.

Table of Contents