12 June  2002 IHOP Convective Initiation Simulation


Description:  Simulated atmospheric fields were generated using version 3.5 of the MM5 model.  The simulation was initialized at 06 UTC on 12 June 2002 with 20-km RUC data and then integrated forward for 24 hours on a single 280x400 grid point domain (referred to below as Domain A) with 4-km horizontal resolution and 60 sigma levels.    Several sensitivity simulations were performed in order to identify the optimal configuration of parameterization schemes that generated the most realistic simulation of this event.    The most realistic simulation employed the following parameterizations:
  • Goddard microphysics
  • MRF planetary boundary layer
  • RRTM/Dudhia radiation
  • OSU land surface model
  • Explicit convection (i.e. no cumulus parameterization)
A separate MM5 simulation with the same model configuration was performed on a subset domain located over Oklahoma.  This simulation was initialized at 06 UTC on 12 June 2002 with 20-km RUC data and then integrated forward for 24 hours on a single 430x430 grid point domain (referred to below as Domain B) with 1.3-km horizontal resolution and 60 sigma levels.

Current Datasets:
  Three separate datasets were generated for this case.  Atmospheric profiles are stored in both binary and netcdf format for each GIFTS cube (128 x 128 grid points on the 101 AIRS pressure levels).

Dataset 1:  Data with 4-km horizontal resolution from Domain A is available every 30 minutes from 12 UTC 12 June until 00 UTC 13 June.  This dataset contains 2x3 GIFTS cubes for each output time for a total of 150 cubes.  The total dataset size is 24 Gb.

Dataset 2:  Data with 4-km horizontal resolution for a small subset region of Domain A (consisting of a single GIFTS cube) is available every 5 minutes from 12 UTC on 12 June until 00 UTC on 13 June.  This dataset consists of a single cube for each output time for a total of 145 cubes.  The total dataset size is 24 Gb.

Dataset 3:  Data with 1.3-km horizontal resolution from Domain B is available every 15 minutes from 18 UTC until 20 UTC on 12 June.  This dataset consists of 3x3 GIFTS cubes for each output time for a total of 81 cubes.  The total dataset size is 14 Gb.  Since this dataset contains 1.3-km data, each GIFTS cube is actually only 1/9 the geographical size of the typical GIFTS cube with 4-km horizontal resolution.

Simulated Atmospheric Field Images:

Datasets 1 and 2

Dataset 3

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