Temporal and Spatial Distribution Characteristics of Regional rainstorm Process to the East of 95 ° E in China from 1981 to 2015
Based on the daily precipitation intensive observation data and NCEP/NCAR reanalysis data in China from 1981 to 2015, the case spectra of regional rainstorm processes in the east of 95 ° E and its six sub regions in China were established by combining subjective and objective methods, and the statistical characteristics of temporal and spatial distribution of regional rainstorm processes in the east of 95 ° E in China were further analyzed by using wavelet power spectrum, 9-point binomial smoothing and clustering of sum of squares of deviations. The results show that: (1) the average annual total number of regional rainstorm processes east of 95 ° E in China is close to 30; Among them, the Yangtze Huaihe River Basin is the sub region with the most regional rainstorm processes, with an average of 19 times/a; The second is the eastern part of South China and Southwest China, with an average of 10.5 and 5.8 times per year; The average frequency in Northeast China, North China, and the eastern part of Northwest China is only 1-3 times per year. (2) The annual and interdecadal variation of regional rainstorm process frequency in the east of China 95 ° E and its sub regions is mainly characterized by fluctuations. The annual and interdecadal fluctuations in the Yangtze Huaihe River basin in the sub regions are the most consistent with those in the east of China 95 ° E; The fluctuations in South China and Southwest China, as well as Northeast China and North China, are significantly positively correlated with each other. The annual total number of regional rainstorm processes east of 95 ° E in China and its sub regions all show a 2-4 year cycle. In addition, the Yangtze Huaihe River Basin, South China and the eastern part of Northwest China also show a 6-10 year cycle, while North China shows a 13-17 year cycle. (3) The regional rainstorm process east of 95 ° E in China is generally characterized by the distribution of the most in summer, the least in winter, and more in spring than in autumn, with the most occurrence in July. In each sub region, the regional rainstorm process in the Yangtze Huaihe River basin and the eastern part of southwest China is the most in June and July, and that in South China is the most in May and June; The eastern regions of Northeast China, North China, and Northwest China are concentrated in July and August. (4) The extreme regional rainstorm process in the area east of 95 ° E in China can be divided into 7 distribution types. The Type I-IV heavy rainfall areas gradually lift northward in a stepped pattern from the southern part of Jiangnan and South China to the eastern part of Huanghuai and Sichuan Basin. In addition to heavy rainfall areas along the southeast coast, Type V-VII is distributed from the eastern part of South China to Jianghuai, Type VI is distributed from the northern part of Huanghuai to the central and southern part of Northeast China, and Type VII is also distributed in the western part of Huanghuai and the central and southern part of North China.
期刊介绍：
Journal of Meteorological Research publishes research that advances observation, modeling, and forecasting/prediction of weather and climate, as well as related topics in earth system sciences.
Covers both basic and applied dynamics, physics, and chemistry of the atmosphere and its interfaces.
A Springer co-sponsored journal focused on speed of submission and review, service, and integrity.
Official journal of the Chinese Meteorological Society.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
