tropo_sample

Sample the tropopause height from tropopause data file created by e.g. tropo at a given time, latitude, and longitude provided in the atmosphere data file . The tropopause data files may contain snapshots at a certain time or climatologies. The results in terms of tropopause geometric height, pressure, temperature, and water vapour volume mixing ratio are written to the tropopause sample output file .

# calling tropo_sample
$ tropo_sample  <ctl> <sample.tab> <tropo.nc> <var> <atm_in>

The type of tropopause information to be extracted is selected with the \<var> argument. This argument is the variable prefix used in the NetCDF file created by tropo. The following prefixes are available:

parameter	description
clp	cold point tropopause
wmo_1st	WMO first lapse rate tropopause
wmo_2nd	WMO second lapse rate tropopause
dyn	dynamical tropopause

For example, using dyn samples the variables dyn_z, dyn_p, dyn_t, and, if available in the file, dyn_q and dyn_o3.

The following configuration parameters are effective in tropo_sample:

parameter	purpose	default
TROPO_SAMPLE_METHOD	Define interpolation method. Default=1: linear interpolation. Everything else: nearest neighbor.	1