A Numerical Study of Thunderstorm Electrification: Initial Electrification and Thunderstorm Climatology
Annual progress rept. 11 Dec 1990-15 Nov 1991,
WASHINGTON UNIV SEATTLE DEPT OF ATMOSPHERIC SCIENCES
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Our purpose is to identify those atmospheric conditions that lead to thunderstorm electrification. We have collected aircraft and radar measurements of atmospheric parameters made during several recent intensive field studies, and we are modifying our thunderstorm model to make it more realistic. The radar measurements will be used as inputs to the model and we will attempt in-cloud microphysical, dynamical and electrical behavior in a range of atmospheric environments. As our simulations evolve, we will examine the relationships between atmospheric sounding parameters and subsequent electric field development and we will classify soundings in terms of parameters relevant for lightning production.