Electrical Behavior of Downburst-Producing Convective Storms over the High Plains

Details Electrical Behavior of Downburst-Producing Convective Storms over the High Plains Electrical Behavior of Downburst-Producing Convective Storms over the High Plains

2006-08-22

arxiv.org/abs/physics/0608218v5

Physics

Atmospheric and Oceanic Physics

Web page (.html) format, 7 figures; corrected typos, minor text modifications; added one figure, added one reference, text mod

Scientific paper

A great body of research literature pertaining to microburst generation in convective storms has focused on thermodynamic factors of the pre-convective environment as well as storm morphology as observed by radar imagery. Derived products based on Geostationary Operational Environmental Satellite (GOES) sounder data have been found to be especially useful in the study of thermodynamic environments. However, addressed much less frequently is the relationship between convective storm electrification, lightning phenomenology and downburst occurrence. Previous research in lightning production by convective storms has identified that electrification, phenomenology, and polarity are dependent upon the thermodynamic structure of the ambient atmosphere, especially vertical moisture stratification. Thus, relevant parameters to describe the thermodynamic setting would include convective available potential energy (CAPE), due to its influence on updraft strength, and moisture characteristics of the boundary layer, due to its relationship to precipitation physical processes. It has already been addressed that buoyant energy and moisture stratification are important factors in convective storm development and downburst generation.

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