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Xu, L., Y. Zhang, F. Wang, and X. Cao, 2019: Simulation of inverted charge structure formation in convective regions of mesoscale convective system. J. Meteor. Soc. Japan, 97, https://doi.org/10.2151/jmsj.2019-062.
Early Online ReleaseGraphical Abstract with highlights

Plain Language Summary: The inverted charge structure of a mesoscale convective system is simulated using the Weather Research and Forecasting (WRF) model coupled with electrification and discharge processes. The evolution of a normal–inverted–normal charge structure in the convective region can be reproduced only by the rime accretion rate (RAR)-based electrification scheme. The results reveal that the inverted charge structure is caused by the strong updraft, high LWC and high RAR, which appear above the height of the −20°C layer.

Highlights:

  • The evolution process of a normal–inverted–normal charge structure in the convective region of a mesoscale convective system is successfully simulated by an electrification and discharge model.
  • A positive graupel charging region is generated above −20°C layer due to the strong updraft (>16 m s−1), high LWC (>2 g m−3) and high RAR (>4.5 g m−2 s−1), resulting in the inverted tripole charge structure.
  • In the high plains of the United States, the microphysical-derived mechanism is responsible for inverted charge structure, while the dynamical-derived inverted charge structure is more likely in North China.

New Releases and Graphical Abstracts

JMSJ, 2019, Vol. 97, No.6 (December)EOR NEW

JMSJ, 2019, Vol. 97, No.5 (October)EOR NEW

JMSJ, 2019, Vol. 97, No.4 (August)New issue