84th AMS Annual Meeting

Thursday, 15 January 2004: 11:45 AM
Impacts of perturbed soil moisture conditions on short range ensemble variability
Room 607
Christian J. Sutton, CIRES/Univ. of Colorado, Boulder, CO; and T. M. Hamill
Poster PDF (1.2 MB)
One characteristic of ensemble forecasts has been their under-dispersive nature. The purpose of this experiment is to explore how to generate a perturbed soil moisture initial condition and determine its impact on short range ensemble forecasts using the NCAR/PSU MM5 version 3. Several Great Plains warm-season short-range forecasts will be carried out three ways: with a perturbed atmosphere, with a perturbed soil moisture, and with both a perturbed atmosphere and perturbed soil moisture. The results will help determine the how much missing spread can be explained by perturbing the soil moisture.

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