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     The ASCII file input options on the INPUTFIL card allow the user to read the "card image" meteorological data.  This includes the option for inputting hourly wind profile exponents and vertical potential temperature gradients through use of the CARD format option.  If the CARD format is not used, then the default values of wind profile exponents and vertical potential temperature gradients are used unless the user specifies non-default inputs using the ME WINDPROF or ME DTHETADZ keyword options.

     The meteorological data file for the Short Term model normally consists of a single complete year of meteorological data, beginning with hour 0100 of January 1 and ending with hour 2400 of December 31.  For certain applications, such as long term risk assessments, it may be desirable to obtain averages calculated over a period longer than a single year.  For these applications, the Short Term model is able to read multiple-year meteorological data files in any of the ASCII formats described above.  At the present time, the model is not able to read multiple-year UNFORMatted meteorological data files.

     The simplest way to obtain these multiple-year data files is by using the DOS COPY command to concatenate preprocessed ASCII data files.  An example of using the DOS COPY command for this purpose is shown below for concatenating five years of meteorological data:

COPY RDU86.ASC+RDU87.ASC+RDU88.ASC+RDU89.ASC+RDU90.ASC RDU86-90.ASC

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To use this five-year ASCII data file, simply include the new file name on the ME INPUTFIL card with the appropriate ASCII file format, and include the year corresponding to the first data file on the ME SURFDATA and ME UAIRDATA cards, described below in Section 3.5.3.  By using the DOS COPY command, the header record at the beginning of each yearly data file will be included within the multiple-year data file.  The model will read the embedded header records if they are present, and check for agreement of the surface and upper air station IDs with the values input on the SURFDATA and UAIRDATA cards.  The model is also able to read the multiple-year data file if the header records for subsequent years have been removed.  See Section 3.2.3.1 for a discussion of how different averaging time options are handled when multiple-year data files are used with the Short Term model.

 

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