DESCRIPTION
r.clim calculates solar radiation and percentage relative
humidity maps. The calculation of the two values for each raster cell
is based on the C code cclimm.c a simplified version of mtclim43.c by
Peter Thornton (2000) of the NTSG, School of Forestry University of
Montana. The cclimm.c code is thought for monthly data and doesn't
consider arid correction so this module isn't indic ated for arid
region.
The input units are:
- Temperatures: degrees C
- Precipitation: mm / day
- Elevation: m
- Slope: degrees
- Aspect: degrees
- Latitude: decimal degrees
- E/W horizons: decimal degrees
while the output units are:
- Relative humidity: %
- Radiation: W/m2, average over daylight period
SEE ALSO
g.region
r.slope.aspect
r.sun
REFERENCE
C. Sboarina, 2002: Development of a complete climate database using a new GRASS module. In B. Benciolini, M. Ciolli, and P. Zatelli, editors, Proc. of the Open Source Free Software GIS - GRASS users conference 2002, Trento, Italy, 11-13 September 2002
AUTHOR
Chiara Sboarina, Centro di Ecologia Alpina - Viote del Monte Bondone (TN) - Italy (2001)
based on "mtclim43" by
Peter Thornton (2000) of the NTSG, School of Forestry University of Montana.
Last changed: $Date$