direct_solar_radiation {TrenchR} | R Documentation |
The function estimates direct solar radiation (W/m2) based on latitude, day of year, elevation, and time. The function uses two methods (McCullough and Porter 1971; Campbell and Norman 1998) compiled in Tracy et al. (1983).
direct_solar_radiation(lat, doy, elev, t, t0, method = "Campbell 1977")
lat |
|
doy |
|
elev |
|
t |
|
t0 |
|
method |
|
numeric
direct solar radiation (W/m2).
Campbell GS, Norman JM (1998).
Introduction to environmental biophysics, 2nd ed. edition.
Springer, New York.
ISBN 0387949372.
McCullough EC, Porter WP (1971).
“Computing Clear Day Solar Radiation Spectra for the Terrestrial Ecological Environment.”
Ecology, 52(6), 1008-1015.
doi: 10.2307/1933806.
Tracy CR, Hammond KA, Lechleitner RA, II WJS, Thompson DB, Whicker AD, Williamson SC (1983).
“Estimating clear-day solar radiation: an evaluation of three models.”
Journal of Thermal Biology, 8(3), 247-251.
doi: 10.1016/0306-4565(83)90003-7.
Other microclimate functions:
air_temp_profile_neutral()
,
air_temp_profile_segment()
,
air_temp_profile()
,
degree_days()
,
diurnal_radiation_variation()
,
diurnal_temp_variation_sineexp()
,
diurnal_temp_variation_sinesqrt()
,
diurnal_temp_variation_sine()
,
monthly_solar_radiation()
,
partition_solar_radiation()
,
proportion_diffuse_solar_radiation()
,
solar_radiation()
,
surface_roughness()
,
wind_speed_profile_neutral()
,
wind_speed_profile_segment()
direct_solar_radiation(lat = 47.61,
doy = 112,
elev = 1500,
t = 9,
t0 = 12,
method = "Campbell 1977")