Subversion Repositories lagranto.ecmwf

.TH getmima
.SH NAME 
.B getmima - get the mimimum and maximum of a field on a netCDF file, interpolated either to a pressure or an isentropic surface.
.SH SYNOPSIS 
.B getmima
.I filename
.I field
.I [ Pval | Tval ]
.SH DESCRIPTION
Interpolate the field "field" of a netCDF file "filename" either onto a pressure surface "Pval" or onto an isentropic surface "Tval", where the level is given in hPa or K, respectively. The output is in the format: min.max, lonmin, latmin, pmin, tmin, lonmax, latmax, pmax, tmax.
.SH PARAMETERS
.TP 15
.B filename 
input netCDF file (e.g. P20110102_00)
.TP 15
.B field
name of the field on the netCDF file (as obtained from
.B getvars).
.TP 15
.B Pval
specification of a pressure surface at height "val" in hPa (e.g. "P500" for 500 hPa).
.B Tval
specification of an isentropic surface at height "val" in K (e.g. "T320" for 320 K).
.SH EXAMPLES
.TP 5
.B [1] getmima P20110201_00 T P500
gives the mimimum and maximum temperature on the 500 hPa surface - the output is:  -49.155    -2.606   80.00  -88.00   500   0.0 -143.00    9.00   500   0.0, i.e. the minium temperture is -49.155 deg C at (lon,lat,p,time)=(80, -88, 500, 0) and correspondingly for the maximum temperature.
.TP 5
.B [2] getmima S20110201_00 PV P320
gives the minium and maximum potential vorticity (PV) on the 320-K isentropic surface.
.SH AUTHOR
Written by Michael Sprenger and Heini Wernli (January 2011)