Large dependency of charge distribution in a tropical cyclone inner core upon aerosol number concentration

Yousuke Sato, Yoshiaki Miyamoto, Hirofumi Tomita

研究成果: Article査読

9 被引用数 (Scopus)

抄録

The impacts of aerosols on the charge distribution of hydrometeors and lightning flash density in a tropical cyclone (TC) were investigated using a meteorological model coupled with an explicit lightning model. The meteorological model successfully simulated the tripole structure of charge density distribution in a TC, as reported by previous studies. The impacts of aerosols were investigated through a sensitivity experiment with changing the aerosol number concentration. The tripole structure became unclear with increasing aerosol number concentrations. The positive charge distribution located in the lower layer was not seen, and raindrops with negative charge distribution reached the surface. As a result, the vertical structure of the charge density was dipolar in the polluted case. As the tripole structure shifted to dipole, the magnitude of the electric field tended to be large, and the flash number was large. By contrast, in the pristine case, the tripole structure was dominant, and the flash number was much smaller than in the polluted case. [Figure not available: see fulltext.].

本文言語English
論文番号62
ジャーナルProgress in Earth and Planetary Science
6
1
DOI
出版ステータスPublished - 2019 12月 1

ASJC Scopus subject areas

  • 地球惑星科学一般

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