基于全球闪电定位网的江淮闪电定位网探测效率分析：以台风“利奇马”为例

郑嘉怡; 陆高鹏; 刘非凡; 任欢; 彭康铭; 王庸平; 祝宝友

doi:10.16032/j.issn.1004-4965.2023.012

基于全球闪电定位网的江淮闪电定位网探测效率分析：以台风“利奇马”为例

doi: 10.16032/j.issn.1004-4965.2023.012

郑嘉怡¹,
陆高鹏^{1, 2, 3, ,},
刘非凡¹,
任欢¹,
彭康铭¹,
王庸平¹,
祝宝友¹

1.
中国科学技术大学地球和空间科学学院，安徽合肥 230026
2.
南京信息工程大学气象灾害预报预警与评估协同创新中心，江苏南京 210044
3.
中国科学院合肥物质科学研究院安徽光学精密机械研究所/中国科学院大气光学重点实验室，安徽合肥 230031

基金项目:

国家重点研发计划项目 2019YFC1510103

国家重点研发计划项目 2017YFC1501501

中国科学院稳定支持基础研究领域青年团队计划 YSBR-018

详细信息

通讯作者:
陆高鹏，男，江苏省人，教授，博士，主要从事雷电物理学研究。E-mail: gplu@ustc.edu.cn

中图分类号: P427.3
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出版历程
- 收稿日期: 2021-06-03
- 修回日期: 2022-02-24
- 刊出日期: 2023-02-20

EVALUATE THE DETECTION EFFICIENCY OF JIANGHUAI AREA SFERIC ARRAY BASED ON THE WORLD WIDE LIGHTNING LOCATION NETWORK: A CASE STUDY OF TYPHOON LEKIMA

1.
University of Science and Technology of China, Hefei 230026, China
2.
Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China
3.
Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

摘要

摘要: 基于全球闪电定位网(World Wide Lightning Location Network，WWLLN) 获取的闪电定位资料对江淮闪电定位网(Jianghuai Area Sferic Array，JASA) 在内陆及近海区域的闪电实时探测性能进行评估。通过对2019年第9号超强台风“利奇马”期间产生的闪电活动进行对比分析，发现JASA和WWLLN对台风闪电的径向分布、时间变化和空间变化有较好的一致性，绝大部分闪电发生在云顶亮温小于220 K区域；在台风发展阶段，内核区闪电活动较为频繁，在台风成熟和消亡阶段时，闪电主要分布外雨带，内核区的闪电活动少但集中。在探测效率方面，JASA对江淮区域实时定位到的闪电数远多于WWLLN，相对探测效率和绝对探测效率分别为69.12% 和92.51%。而在海洋区域(114~130 °E，20~24 °N和123~130 °E，24~32 °N)，由于受到JASA站点位置分布的限制，闪电实时定位数略少于WWLLN，其相对探测效率和绝对探测效率分别为32.67% 和52.26%。研究结果表明了JASA对内陆及近海区域雷暴具备较强的捕获能力，为实时监测台风期间强对流闪电活动的演变规律提供数据支撑，也为进一步完善站点布局以提升深海区域闪电探测性能提供了理论支撑。
- 江淮闪电定位网 /
- 探测效率 /
- 全球闪电定位网 /
- 台风“利奇马” /
- 台风闪电
Abstract: Based on the lightning location data obtained by the World Wide Lightning Location Network (WWLLN), this study evaluates the real-time lightning detection performance of the Jianghuai Area Sferic Array (JASA) in inland and marine areas. A comparative analysis of the lightning activity during the visit of super typhoon Lekima (1909) showed that JASA and WWLLN had good consistency in radial distribution, temporal and spatial changes of typhoon-related lightning, and most of the lightning occurred where the cloud-top brightness temperature is less than 220 K. During the development stage of the typhoon, lightning activities in the inner core area were more frequent. When the typhoon matured and disappeared, lightning was mainly distributed in the outer rainband, and lightning activities in the inner core area were few but concentrated. In terms of detection efficiency, JASA's real-time location of lightning in the Jianghuai area was much more than WWLLN's, and its relative detection efficiency and absolute detection efficiency were 69.12% and 92.51%, respectively. In the marine area (114~130 °E, 20~ 24 °N and 123~130 °E, 24~32 °N), due to the limitation of JASA site layout, the real-time positioning number of lightning was slightly less than that of WWLLN, and its relative detection efficiency and absolute detection efficiency were 32.67% and 52.26%, respectively. The results show that JASA has a strong ability to capture inland and offshore thunderstorms, and provides data support for real-time monitoring of the evolution of strong convective lightning activities during typhoons'visits. Our analysis also provides a theoretical basis for further improving the site layout and support for improving the lightning detection performance in the open sea.
- Jianghuai Area Sferic Array (JASA) /
- detection efficiency /
- World Wide Lightning Location Network (WWLLN) /
- Typhoon Lekima /
- lightning activity of typhoon

HTML全文

图 1 江淮网的站点分布(菱形表示各个站点)

下载: 全尺寸图片幻灯片

图 2 JASA研究区域示意图

虚线框表示研究区域A和B，蓝线表示台风路径，填色表示闪电数，网格分辨率为0.2 °×0.2 °。

下载: 全尺寸图片幻灯片

图 3 WWLLN和JASA探测到的闪电频数随时间的变化

下载: 全尺寸图片幻灯片

图 4 闪电密度(柱状)和闪电频数(折线)随径向分布的变化

下载: 全尺寸图片幻灯片

图 5 019年8月8日14时WWLLN(a、c)和JASA(b、d)闪电分布叠加Himawari-8卫星的云顶亮温(a、b，圆环依次为内核、内雨带、外雨带)以及台风闪电的空间分布(c、d，实线为台风路径，红点为闪电事件)

下载: 全尺寸图片幻灯片

图 6 台风闪电(a)和眼壁闪电(b)闪电频数(柱形)、最大风速(绿线)、最低气压(红线)随时间逐小时的变化

ZJ、SD分别代表登陆浙江和山东的时次。

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表 1 WWLLN与JASA探测的闪电数量及探测效率

类型	江淮区域所有闪电	海洋区域所有闪电	江淮区域台风闪电	海洋区域台风闪电
WWLLN	24 825	51 959	3 494	11 384
JASA	124 989	35 146	13 326	8 392
匹配的闪电数	15 948	17 919	2 415	3 719
绝对探测效率	93.37%	50.80%	92.51%	52.26%
相对探测效率	64.24%	34.49%	69.12%	32.67%

下载: 导出CSV

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