The MODIS Airborne Simulator (MAS) was flown on the NASA ER-2 aircraft for the CRYSTAL-FACE field campaign. MAS data, including the spectral response functions used to derive these ice bulk scattering files, are available at this link.
These models are the result of a multiyear team effort to derive new ice cloud scattering models based on reanalysis of in-situ data from a variety of midlatitude and tropical ice cloud field experiments. Here are a few details about the models:
- Size distributions are based on 45 size bins (particle size ranges from 2 to 9500 microns).
- Ice particle habit distributions vary as a function of maximum dimension.
- New ice crystal scattering property libraries have been calculated for a variety of habits, including plates, hollow and solid columns, 3-D bullet rosettes, and aggregates.
- Each model contains the mean and standard deviation of each microphysical and optical property, including ice water content, mean mass diameter, single scatter albedo, asymmetry factor, fraction of delta transmitted energy, extinction efficiency, and the scattering phase function.
In situ Microphysical Ice Cloud Data
More complete descriptions of the in situ data are provided in the following links.
Ice crystal habit "recipe" implemented for these models
The percentage of each habit used in the integration of a given property over a particle size distribution is based on the particle's maximum dimension.