Modeling the Quasi-Static Electric Structure of Various Scales of Thunderstorms
Balloon measurements of the electric field show that mature storms usually have substantial,horizontal charge layers that change relatively slowly and form a stable multilayer electric structure in different parts of the storm. Such electric structure is observed in the thunderclouds of various scales: from small air mass storms to mesoscale convective systems with the lateral scale of the order of hundreds kilometers. The measurements typically show a charge structure of 4 or more charge regions in different parts of the storms, so their modeling requires a more complex set of electric sources than used previously. We consider a single approach to the modeling electric structure of various scale thunderstorms. Their rather complicated electric structure is modeled by introducing a set of layers of vertical external currents. The lateral scale of the external current region corresponds to the horizontal extent of the modeled part of storm, in which the magnitude and thickness of the layers are chosen to provide the best fit to the measured electric field profile. The above approach was applied to model both typical small storms with different electric structures in the updraft and non-updraft regions, and typical stratiform precipitation regions of mesoscale convective systems.
Stanislav S. Davydenko Alexander S. Sergeev Eugene A. Mareev Thomas C. Marshall Maribeth Stolzenburg
Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanova str., 603950 Nizhny Novgorod, Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanova str., 603950 Nizhny Novgorod, Department of Physics and Astronomy, University of Mississippi, University, Mississippi, USA
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）