Statistical Characteristics of Thunderstorm Activity in the Middle Reaches of the Yangtze River Basin Based on a Five‐Year Cloud‐To‐Ground Lighting Data Set
Statistical Characteristics of Thunderstorm Activity in the Middle Reaches of the Yangtze River Basin Based on a Five‐Year Cloud‐To‐Ground Lighting Data Set
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DOI：
10.1029/2023gl106498
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发表时间：
2023-12
影响因子：
5.2
通讯作者：
Qian Wei;Jianhua Sun;Yuanchun Zhang;Dongxia Liu;Zhuling Sun;Mingyuan Liu;Zheng Ma
中科院分区：
文献类型：
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作者：
Qian Wei;Jianhua Sun;Yuanchun Zhang;Dongxia Liu;Zhuling Sun;Mingyuan Liu;Zheng Ma
使用基于云对地(CG)闪电数据的聚类算法，在2016-2020年5月至9月期间，识别和跟踪了长江中游地区的72974场雷暴。雷暴主要出现在东南部地区，并以每小时16-公里的速度向东北方向移动。大多数雷暴持续时间较短(98.3%，≤为3小时)，闪电频率较低(90.0%，≤)。持续时间较长的雷暴主要发生在山区附近，往往在下午(傍晚)出现得更早(结束)。所有雷暴的CG闪电对应的峰值综合反射率(CR)为50dBz。大约70%(20%)的CG闪光发生在对流(层状)区域。雷暴的第一次CG闪电往往发生在CR比最后一次CG闪电高的对流区。随着雷暴持续时间的延长，闪电的平均CRS和最大CRS显著增加。
Using a clustering algorithm based on cloud‐to‐ground (CG) lighting data, 72,974 thunderstorms were identified and tracked in the middle reaches of the Yangtze River Basin from May to September of 2016–2020. Thunderstorms predominantly occur in the southeast region and move to the northeast at a speed of 16–64 km/hr. Most thunderstorms have short durations (98.3%, ≤3 hr) and low CG flash frequencies (90.0%, ≤64). Thunderstorms with longer durations are mainly triggered near the mountains and tend to occur (end) earlier (later) in the afternoon (evening). The peak composite reflectivity (CR) corresponding to CG flashes from all thunderstorms is 50 dBZ. Approximately 70% (20%) of CG flashes occur in convective (stratiform) areas. The first CG flash of a thunderstorm tends to occur in convective areas with a higher CR than that of the last CG flash. The average and maximum CRs of CG flashes increase significantly with thunderstorm duration.