mol_abs_param
Molecular absorption parameterization
Description
The variable mol_abs_param sets the parameterization used in libRadtran top calculate integrated
shortwave or longwave irradiances or to simulate satellite instruñent channels. The current implemented options
in ALG are shown in the Table below:
Value(s) | Description |
reptran |
REPTRAN Default value
Representative wavelengths parameterization adapted for spectral bands (Gasteiger et al., 2014).
Different band widths may be in the spectral configuration between fine (1 cm-1), medium (5 cm-1) and coarse (15 cm-1).
Absorption data is mainly based on HITRAN 2004. Absorption by H2O, CO2, O3, N2O, CO, CH4, O2,
N2, and NO2 is considered, and absorption by all other gases is zero. By default volume mixing ratios of N2O, CO, CH4,
and N2 from the US standard atmosphere are applied. Users can change the default gas profiles through the options in TRACE.
In case of radiative transfer problems with solar source, the extraterrestrial spectrum from Kurucz is applied by default. |
crs |
CRS Not yet implemented!
Switch off spectral parameterizations. Only molecular absorption cross sections from crs_file (including the default ones) are considered. |
lowtran |
LOWTRAN
Gas absorption parameterization from LOWTRAN; code adopted from SB-DART (Ricchiazzi et al., 1998). |
References
Gasteiger, J., Emde, C., Mayer, B., Buras, R., Buehler, S., & Lemke, O., (2014),
"Representative wavelengths absorption parameterization applied to satellite channels and spectral bands." J. of Quantitative Spectroscopy and Radiative Transfer.
Vol. 148, pp. 99‒ 115.
Ricchiazzi, P., Yang, S., Gautier, C., & Sowle, D., (1997),
"SBDART: A research and Teaching software tool for plane-parallel radiative transfer in the Earth's atmosphere." Bulletin of the American Meteorological Society.
Vol. 79, pp. 2101‒ 2114.