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Calculation of the Parameters in qtcmpar.in

 

A summary of the variables in this file is given in Section gif. The parameters in qtcmpar.in are generated by a Fortran 77 program, par.f. One can compile par.f using a command f77 -o par par.f, and then run par. It produces the file, qtcmpar.in. The input reference profile for par.f is Tqo3.ref which includes SST (K), air temperature (K), water vapor mixing ratio (kg/kg), and ozone mixing ratio (kg/kg) in 1 hPa interval from 1000 hPa to 1 hPa.

For calculating a1, 900 hPa cloud base and 200 hPa cloud top are used. Below the cloud base, the atmosphere is dry adiabatic; above the cloud base, the atmosphere is moist adiabatic. Relative humidity profile is a linear fit to the observed reference relative humidity, which is 85% near surface and 60% at 200 hpa. Tqo3.ref is used to calculate reference values of the gross moist stability and the gross moisture stratification. However, the model is sensitive to qtcmpar.in, so reasonable values are assigned to the gross moist stability (3.5) and the gross moisture stratification (3.0), and cloud top is set at 200 hPa at the moment. The package qtcmparv2.1.tar.gz consists of par.f and associated programs and GrADs scripts.



Johnny Wei-Bing Lin
Thu Sep 9 13:11:12 PDT 1999