Cloud_rad_scheme

Contact Jing Feng Jing.Feng@noaa.gov for questions

Module required:

pip install netCDF4

pip install miepython

Library required:

Yang et al., 2013 https://doi.org/10.1175/JAS-D-12-039.1

An example file under ./data/ is attached for severly roughened solid column

Input:

1. Parameterization size range [microns] to generate look-up-table for piecewise linear fit or Padé approximant
2. Upper and lower wavenumber [cm-1] limits to match with the band limits of gas optics parameterization
3. Crystal habit and roughness, following the description of Yang et al., 2013.
4. Gamma shape parameter 'a' to match with cloud microphysics scheme.

See example_ice.py and example_liq.py

python3 example_ice.py

python3 example_liq.py

Output: parameterization coefficients over effective radii for given spectral bands

Examples of output files for high-reoslution look up tables and parameterizations at RRTMGP band are provided under example_output/ directory

1. Look-up-table coefficients for ice and liquid.

Output from example_ice.py:

lut_ice_lw_solid_column_severlyroughen_gamma_aeq1_thick.nc

lut_ice_sw_solid_column_severlyroughen_gamma_aeq1_thick.nc

Output from example_liq.py:

lut_liq_lw_mie_gamma_aeq12_thick.nc

lut_liq_sw_mie_gamma_aeq12_thick.nc

2. Padé approximant coefficients for ice and liquid.

Output from example_ice.py:

pade_ice_lw_solid_column_severlyroughen_gamma_aeq1_thick.nc

pade_ice_sw_solid_column_severlyroughen_gamma_aeq1_thick.nc

Output from example_liq.py:

pade_liq_lw_mie_gamma_aeq12_thick.nc

pade_liq_sw_mie_gamma_aeq12_thick.nc

To use parameterization coefficients:

Check './extensions'