Possible Charge Structures in Convective Storms of Northwestern China
The charge structure and the relationships between electrical action and microphysical processes in convective storms of Northwestern China are further studied in this paper. In general, the charge structure featured long persisting lower positive charge center (LPCC) and main negative charge region for large portions of the storms’ lifetimes. It is not affirmed that positive charge region occurs in anvil in early period of rainfall, but exists in after. Based on the special electrical structure, most of intracloud (IC) flashes is produced between main negative and lower positive charge region. In early stage of rain gush, both IC and cloud-to-ground (CG) lighting flashes tend to occur as graupel descends to lower altitudes. A negative correlation between the electrical field at ground (Egnd) and the height of storng reflectivity is supported. The strong reflectivities (>30dBZ) gradients are bigger the flash rates are bigger.
Fengxia Guo Yijun Zhang Muhong Yan
Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Chinese Academy of Meteorological Sciences, Beijing, 100081
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）