Analysis on Characteristics of the Meteorological Drought in Central Yunnan

• 作者: LIU Yang-mei HUANG Ying WANG Jie
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 气象观测站 干旱特征 滇中地区 云南中部 空间分布特征 发生频率 SPI 降水资料
• 年，卷（期）: 2012,（8）
• 页码范围: 72-74
• 页数: 3页
• 分类号: P41

摘要

[Objective]The research aimed to analyze characteristics of the meteorological drought in central Yunnan. [Method]Based on precipitation data at 43 meteorological stations of the central Yunnan,SPI at year scale in each station was calculated,and occurrence frequency of the drought at different grades was conducted statistics. Finally,spline curve interpolation method was used to acquire spatial distribution characteristics of the occurrence frequencies for various-level droughts in central Yunnan. [Result] The drought has experienced the following four stages since 1960 in central Yunnan. Firstly,SPI had obvious decrease trend,and drought had the tendency to become severe in the 1970s. Secondly,in the 1960s and the 1980s,although variation of the SPI was large,we didn't find any distinct changing trend. Thirdly,SPI showed an evident increasing trend from the late 1980s to 2000. That was to say,central Yunnan experienced a wet period within those years. Lastly,the drought became severe from 2001 to 2009. Honghe,Yuanjiang,Binchuan,Luquan and Zhanyi tended to suffer from the medium drought; Kunming,Chenggong,Qujing, northeast Chuxiong,Dali,east Yangbi and central Yuxi tended to suffer from the severe drought; Zhanyi,Binchuan,west Dayao,Xiangyun,north Qujing,Anning and northwest Kunming tended to suffer from the extreme drought. [Conclusion]The research provided theoretical basis for drought prevention and control in the zone.