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NAME

r.clim - Creates two raster map layers: 1. solar radiation 2. percentage relative humidity

KEYWORDS

SYNOPSIS

r.clim
r.clim help
r.clim [-v] tmin=name tmax=name prcp=name [elev=name] [slope=name] [aspect=name] lat=name [ehoriz=name] [whoriz=name] month=integer rad=name hum=name [--overwrite] [--verbose] [--quiet]

Flags:

-v
Run verbosely
--overwrite
Allow output files to overwrite existing files
--verbose
Verbose module output
--quiet
Quiet module output

Parameters:

tmin=name
Name of input raster map containing MINIMUM TEMPERATURE
tmax=name
Name of input raster map containing MAXIMUM TEMPERATURE
prcp=name
Name of input raster map containing PRECIPITATION in mm
elev=name
Name of input raster map containing ELEVATION (m)
slope=name
Name of input raster map containing SLOPE (degree)
aspect=name
Name of input raster map containing ASPECT (degree, anti-clockwise from E)
lat=name
Name of input raster map containing LATITUDE in decimal degrees
ehoriz=name
Name of input raster map containing EAST HORIZON (degree)
whoriz=name
Name of input raster map containing WEST HORIZON (degree)
month=integer
Number of the month in the year i.e. January=1, February=2,...
rad=name
Name of output raster map containing SOLAR RADIATION in W/m^2
hum=name
Name of output raster map containing RELATIVE HUMIDITY in %

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:

while the output units are:

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: 2011-11-08 13:56:45 -0800 (Tue, 08 Nov 2011) $


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