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DOI	10.1016/j.atmosres.2020.105166
	The relationship between lightning flash rate and ice-related volume derived from dual-polarization radar
	Hayashi S.; Umehara A.; Nagumo N.; Ushio T.
发表日期	2021
ISSN	0169-8095
卷号	248
英文摘要	To conduct accurate lightning prediction and nowcasting, it is important to clarify the relationship between electrification and microphysical properties in clouds. Using the dual-polarization Doppler radar with the hydrometeor classification algorithm and lightning observation, radar-derived microphysical properties related to lightning flash rate were investigated in terms of 10 isolated thunderstorm cases over the Kanto Plain, Japan, with 351 radar volume scans conducted every 5 min during the summer period. In this study, the ice-related particles within the 35 dBZ volume (V35IC) showed the highest correlation coefficient (r = 0.75) and the lowest normalized root mean square error (NRMSE = 8.3%) in relation to cloud-to-ground lightning (CG), and also best to intra-cloud lightning (IC, r = 0.69, NRMSE = 8.1%). The correlation between V35IC and CG flash rate was better than that of the mixed-phase (between 0 °C and − 40 °C) 35 dBZ volume (r = 0.64), without considering the microphysical particles. The second-best radar-derived microphysical property was the ice mass consisting of the radar grids of all the ice-related particles (r = 0.72). These results suggest that an effective lightning indicator in terms of a radar-derived property is the ice-related particle volume, in addition to the traditionally used graupel and hail. The ice-related particle volume in the colder region of the thunderstorm (air temperature lower than −10 °C) showed a higher correlation with CG and IC than that in the warmer region, especially in terms of IC. These results are consistent with the non-inductive charging theory that has been well accepted in previous studies. Following time-lag correlation analysis from 0 to −30 min every 5 min before thunderstorm initiation, it was found that the ice-related index of V35IC demonstrated the slowest decrease (r = 0.75–0.65 in 30 min) in the correlation coefficient with time lapse and may be suitable as a lightning nowcast indicator. © 2020 Elsevier B.V.
英文关键词	Hydrometeor classification algorithm; Lightning; Polarimetric radar
语种	英语
scopus关键词	Clouds; Doppler radar; Integrated circuits; Lightning protection; Mean square error; Polarization; Precipitation (meteorology); Thunderstorms; Cloud-to-ground lightning; Correlation coefficient; Dual polarization radars; Hydrometeor classification; Lightning observations; Microphysical property; Non-inductive charging; Root mean square errors; Ice; algorithm; cloud microphysics; correlation; Doppler radar; ice; lightning; nowcasting; thunderstorm; volume; Honshu; Japan; Kanto
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141727
作者单位	Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, 3050052, Japan; Department of Aeronautics and Astronautics, Tokyo Metropolitan University, Tokyo, 1910065, Japan; Observation Department, Japan Meteorological Agency, Tokyo, 1008122, Japan; Division of Electrical, Electronic and Information Engineering, Osaka University, Osaka, 5650871, Japan
推荐引用方式 GB/T 7714	Hayashi S.,Umehara A.,Nagumo N.,et al. The relationship between lightning flash rate and ice-related volume derived from dual-polarization radar[J],2021,248.
APA	Hayashi S.,Umehara A.,Nagumo N.,&Ushio T..(2021).The relationship between lightning flash rate and ice-related volume derived from dual-polarization radar.Atmospheric Research,248.
MLA	Hayashi S.,et al."The relationship between lightning flash rate and ice-related volume derived from dual-polarization radar".Atmospheric Research 248(2021).