气候变化领域集成服务门户(CCPortal): Subseasonal and diurnal variability in lightning and storm activity over the Yangtze River Delta, China, during mei-yu season

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DOI	10.1175/JCLI-D-19-0453.1
	Subseasonal and diurnal variability in lightning and storm activity over the Yangtze River Delta, China, during mei-yu season
	Yang J.; Zhao K.; Chen X.; Huang A.; Zheng Y.; Sun K.
发表日期	2020
ISSN	08948755
起始页码	5013
结束页码	5033
卷号	33 期号:12
英文摘要	Using 5 years of operational Doppler radar, cloud-to-ground (CG) lightning observations, and National Centers for Environmental Prediction reanalysis data, this study examined the spatial and temporal characteristics of and correlations between summer storm and lightning activity over the Yangtze River Delta (YRD), with a focus on subseasonal variability and diurnal cycles. The spatiotemporal features of storm top, duration, maximum reflectivity, size, and cell-based vertical integrated liquid water were investigated using the Storm Cell Identification and Tracking algorithm. Our results revealed that there was high storm activity over the YRD, with weak diurnal variations during the mei-yu period. Specifically, storms were strongly associated with mei-yu fronts and exhibited a moderate size, duration, and intensity. On average, afternoon storms exhibited stronger reflectivity and higher storm tops than morning storms, as evidenced by the afternoon peak in CG lightning. The storm intensity strengthened in the post-mei-yu period, due to an increase in atmospheric instability; this was accompanied by a higher frequency of CG lighting. The diurnal cycles of storm frequency and CG lightning in the post-mei-yu period followed a unimodal pattern with an afternoon peak. This is attributable to increased thermodynamic instability in the afternoon, as little diurnal variation was observed for wind shear and moisture. An inverse correlation between lightning occurrence and mean peak current (MPC) for negative CG lightning was evident during the pre-mei-yu and mei-yu periods. The diurnal variation in MPC for negative CG lightning agreed well with that for storm intensity. © 2020 American Meteorological Society.
语种	英语
scopus关键词	Clouds; Doppler radar; Lightning; Reflection; Cell identification; Cloud-to-ground lightning; National centers for environmental predictions; Spatio temporal features; Subseasonal variability; Temporal characteristics; Thermodynamic instability; Yangtze river delta; Storms; cloud to ground lightning; correlation; diurnal variation; Doppler radar; seasonal variation; spatiotemporal analysis; storm; China; Yangtze Delta
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178747
作者单位	Key Laboratory for Mesoscale Severe Weather/Ministry of Education, School of Atmospheric Science, Nanjing University, Nanjing, China; State Key Laboratory of Severe Weather, Joint Center for Atmospheric Radar Research of the China Meteorological Administration, Nanjing University, Beijing, China; Jiangsu Research Institute of Meteorological Sciences, Nanjing, China; Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, United States; Center for Advanced Data Assimilation and Predictability Techniques, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Yang J.,Zhao K.,Chen X.,et al. Subseasonal and diurnal variability in lightning and storm activity over the Yangtze River Delta, China, during mei-yu season[J],2020,33(12).
APA	Yang J.,Zhao K.,Chen X.,Huang A.,Zheng Y.,&Sun K..(2020).Subseasonal and diurnal variability in lightning and storm activity over the Yangtze River Delta, China, during mei-yu season.Journal of Climate,33(12).
MLA	Yang J.,et al."Subseasonal and diurnal variability in lightning and storm activity over the Yangtze River Delta, China, during mei-yu season".Journal of Climate 33.12(2020).