Analysis of Yunqi Characteristics and Periodicity of Drought Disasters in He'nan Province During 2000 Years
10.16466/j.issn1005-5509.2025.03.020
- VernacularTitle:河南省两千年干旱灾害的运气特征及周期规律分析
- Author:
Hanwei LUN
1
;
Zihan WANG
;
Yinfeng ZHONG
Author Information
1. 北京中医药大学岐黄学院 北京 100029
- Publication Type:Journal Article
- Keywords:
drought disasters;
He'nan Province;
five movements and six climates;
wavelet analysis;
periodicity;
constant climatic factor;
Sitan period;
Zaiquan period
- From:
Journal of Zhejiang Chinese Medical University
2025;49(3):382-390
- CountryChina
- Language:Chinese
-
Abstract:
[Objective]To analyze the Yunqi characteristics and periodicity of drought disasters in He'nan Province during 2000 years.[Methods]On the foundation of the drought data of He'nan Province from 221 BC to 1840 AD,a hierarchical classification was conducted,using statistical tools and wavelet analysis to explore the frequency and periodicity of drought in different Yunqi periods.[Results]The most frequent dominant Qi period of drought in He'nan Province was 4th Qi(Taiyin Shitu)(P<0.001),the most of Sitian period was Jueyin Fengmu and Shaoyin Junhuo(P<0.05),the most of Zaiquan period was Shaoyang Xianghuo(P<0.05).At multiple time scales,drought disasters in He'nan Province had 4 quasi-cycles,the 1st to the 4th quasi-cycles were 510,690,300 and 150 years,respectively.[Conclusion]There was a significant difference in the frequency of drought levels in He'nan Province in different periods of dominant Qi,Sitian period and Zaiquan period,which was partly consistent with the Yunqi theory.Besides,the drought disaster in He'nan Province had certain periodic characteristics.
