摘要
该文采用综合气象干旱指数（cI），利用线性分析、空间分析等方法对怀化市1963--2015年气象干旱特征进行了分析。结果表明：近53a来怀化市年干旱频率在5．6％～41．9％之间，平均为22．7％，在空间上，干旱频率分布在21．4％-24．1％之间，新晃区域干旱频率最高；1963--2015年干旱日数呈增加趋势，变化率为1．5d／10a，从四季看，除夏季外，其他3季干旱日数均呈增加趋势；怀化市年平均轻旱日数为44．1d、中旱25．9d、重旱9．4d、特旱3．4d。
Based on compound meteorological drought index （CI）, the characteristics of meteorological drought in Huaihua City from 1963 to 2015 were analyzed by using linear analysis and spatial analysis. The results show that ： the annual drought frequency of Huaihua City in recent 53 a was between 5.6%-41.9%, with an av- erage of 22.7%. In space, the frequency of drought is distributed between 24.1% -21.4% , and itg the highest frequency of drought in Xinhuang County areas. The meteorological drought days showed an increasing trend during 1963 to 2015, its rate of change was 1.5 d/10 a. ing trend in other three drought days 44. 1 d, days 3.4 d seasons except summer. the middle drought days From the four seasons, the number of dry days showed an increas- The average of annual drought days in Huaihua city： the light 25. 9 d, the heavy drought days 9.4 d, the special drought
出处
《贵州气象》
2016年第6期59-63,共5页
Journal of Guizhou Meteorology
基金
湖南省气象局2016年短平快课题(XQKJ16B064)
关键词
怀化市
CI指数
干旱日数
干旱频率
空间分布
Huaihua City
compound meteorological drought index （CI）
meteorological drought days
drought frequency
spatial distribution
