28-29 August 2005 NCSA Hurricane Katrina Simulation



Description:  This simulation was performed at the National Center for Supercomputing Applications (NCSA) at the University of Illinois at Urbana-Champaign.  Simulated atmospheric fields were generated using version 2.2 of the WRF model (ARW core).  The simulation was initialized at 18 UTC on 28 August 2005 with 1° GFS data and then run for 48 hours on a double-nested domain containing 4.5-km and 1.5-km horizontal grid spacing, respectively. Sub-grid scale processes were parameterized using the Thompson et al. (2008) mixed-phase cloud microphysics scheme, the Mellor-Yamada-Janjic planetary boundary layer scheme (Mellor and Yamada 1982), and the Dudhia (1989) shortwave and Rapid Radiative Transfer Model longwave (Mlawer et al. 1997) radiation schemes. 

The CIMSS forward radiative transfer modeling system was used to compute simulated radiances for each ABI band. The Successive Order of Interaction (SOI) model was used as the radiative transfer solver. The system contains separate modules for the solar (1-7) and infrared (8-16) bands. The infrared module computes gas optical depths using Compact OPTRAN in the CRTM, while the solar module uses a band model lookup table. Both modules compute cloud optical properties using lookup tables based on exact solutions. Surface properties are taken from the CIMSS land surface IR emissivity product and the InfraRed Sea Surface Emissivity Model (IRSSEM) for the infrared module, whereas MODIS land surface albedo products and an ocean surface reflectance model are used for the solar module.

Simulated Atmospheric Field Images (every 30 minutes during 42-hr period)

Domain 2

Simulated ABI Brightness Temperature and Reflectance Images

Domain 2



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