主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2020, Vol. 36 ›› Issue (1): 51-57.doi: 10.3969/j.issn.1673-503X.2020.01.007

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Characteristics of the regional rainstorm processes in Guangxi during 1961-2017

Yan-lan LI(),Zhuo HUANG,Jie-lin HE,Wei-jian QIN   

  1. Guangxi Climate Center, Nanning 530022, China
  • Received:2018-11-12 Online:2020-02-28 Published:2019-12-12

Abstract:

Base on the daily precipitation data from 91 meteorological stations in Guangxi from 1961 to 2017, the variation characteristics of regional rainstorm processes were analyzed using statistical methods such as a linear trend, a low pass filter analysis and a definition of regional rainstorm.The results show that there is a high frequency of rainstorm processes in Guangxi that happen every month of each year.74.2% of total rainstorm cases in a year occur mainly in May to August, and those cases persisting beyond 5 days mostly happen between June and August especially in June.The frequency of regional rainstorm processes in each year or in fall tends to show a remarkable increasing trend from 1961 to 2017.The rainstorm cases happen more frequently after 1990s than before, and the processes that the range of rainstorm cases extends to over 30 stations increase more significantly.In the autumns of recent ten years, both of the rainstorm frequency and intensity increase considerably.

Key words: Regional rainstorm, Low pass filter analysis method, Linear trend method

CLC Number: