2011—2019年安徽南部山区与北部平原闪电分布特征

doi:10.3969/j.issn.1673-503X.2022.04.013

Abstract

Abstract:

According to the detected data of the ADTD lightning location system in Anhui province from January 2011 to December 2019, the parameters associated with lightning such as frequency, polarity, current intensity, etc.in southern mountain areas and northern plains in Anhui province were comparatively analyzed.The results showed that the total lightning frequency in southern mountain areas is about 2.84 times of that in northern plains, and the positive lightning ratio is larger in northern plains than in southern mountain areas, which is related to the types of severe convective weather.In the two areas, the monthly and daily variation of lightning frequencies both present the single peak, and the incidences in spring and summer are significantly more than in autumn and winter, and the lightning is active from afternoon to evening in a day, but the fluctuation range of months and time bucket when lightning occurs at high frequency in southern mountain areas are far greater than in northern plains.The intensities of lightning current in northern plains, on the whole, is larger than in southern mountain areas, and the positive and negative lightning intensities for the former are 10.77 kA and 9.52 kA higher than those for the latter, and the peak values of positive and negative lightning intensities in the two areas both appear in February and October, respectively.The time buckets of positive and negative lightning intensity peak in southern mountain areas and negative lightning intensity peak in northern plains are opposite to those of their frequency peak.Based on the principal component analysis of the total lightning frequency in Anhui province, the cumulative variance contribution of the first five feature vectors after EOF reaches 59.136%, indicating the change trend of lightning activities in the two areas are consistent, but has obvious regional difference.

Key words: Lightning location system, Lightning frequency, Lightning current intensity

CLC Number:

P427.3

Kai WANG,Xiao-yu JU,Yang-yang QIU,Xiang-yang CHENG. Distribution characteristics of lightning in southern mountain areas and northern plains of Anhui province[J]. Journal of Meteorology and Environment, 2022, 38(4): 110-117.

Figures/Tables 11

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References 24

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区域	春季			夏季			秋季			冬季
区域	3月	4月	5月	6月	7月	8月	9月	10月	11月	12月	1月	2月
皖南		1.72			2.56			0.41			0.06
山区	9.41	13.78	10.29	4.85	3.51	2.45	2.91	7.17	20.74	-	-	28.56
皖北		1.34			4.31			0.38			0.12
平原	10.15	13.83	10.65	9.69	5.86	4.33	5.78	6.28	13.04	100	13.33	32.00

年份	皖南山区		皖北平原
年份	正地闪	负地闪	正地闪	负地闪
2011	48.55	33.10	55.26	39.23
2012	53.44	35.45	57.45	46.56
2013	53.20	38.81	88.87	66.16
2014	71.24	47.68	77.23	53.93
2015	55.76	41.42	61.98	49.47
2016	61.96	41.32	71.10	54.90
2017	55.26	36.16	66.27	57.16
2018	52.05	35.41	59.62	35.94
2019	54.43	44.22	65.00	35.96
平均	56.21	39.29	66.98	48.81
平均		47.75		57.90

区域	2月	3月	4月	5月	6月	7月	8月	9月	10月	11月
皖南山区	64.66	48.18	43.55	44.38	44.59	39.68	39.35	42.93	65.61	58.87
皖北平原	71.48	59.59	56.32	59.12	56.30	50.42	49.68	54.93	73.55	65.36

序号	特征值	方差占比/(%)	方差累积占比/(%)	特征值级差	误差阈值	显著性检验
1	8.039	24.361	24.361	3.003	0.335	通过检验
2	5.036	15.260	39.621	2.490	0.210	通过检验
3	2.546	7.714	47.335	0.324	0.106	通过检验
4	2.222	6.735	54.069	0.550	0.093	通过检验
5	1.672	5.067	59.136	0.198	0.070	通过检验
6	1.474	4.466	63.602	0.257	0.061	通过检验
7	1.217	3.688	67.290	0.120	0.051	通过检验
8	1.097	3.325	70.615	1.097	0.046	通过检验

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Distribution characteristics of lightning in southern mountain areas and northern plains of Anhui province

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