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

气象与环境学报 ›› 2012, Vol. 28 ›› Issue (1): 43-47.doi:

• 论文 • 上一篇    下一篇

基于Z指数的河北省旱涝多尺度变化特征

王宏1,2 余锦华1 李宗涛3 周贺玲4   

  1. 1.南京信息工程大学大气科学学院,江苏 南京210044;2.承德市气象局,河北 承德067000;3.河北省气象局,河北 石家庄050021;4.廊坊市气象局,河北 廊坊 065000
  • 出版日期:2012-02-28 发布日期:2012-02-28

Multi-time scale characteristics of drought and flood based on Z index in Hebei province

WANG Hong1,2 YU Jin-hua1 LI Zong-tao3 ZHOU He-ling4   

  1. 1. School of Atmospheric Science, Nanjing University of Information Science and Technology , Nanjing 210044, China; 2. Chengde Meteorological Service, Chengde 067000, China; 3. Hebei Meteorological Service, Shijiazhuang 050021, China; 4. Langfang Meteorological Service, Langfang 065000, China
  • Online:2012-02-28 Published:2012-02-28

摘要: 利用1961—2009年京、津、冀73个站的降水资料,计算降水Z指数,采用趋势分析、小波分析等方法,对河北省的旱涝特征进行了分析。结果表明:近49a来,河北省年降水Z指数呈下降趋势,并存在多时间尺度变化特征,具有7a、9a和15a尺度的周期。夏季降水Z指数呈下降趋势,存在15a显著的变化周期;冬季、春季、秋季的降水Z指数均呈上升趋势,10—11a的周期震荡显著。

关键词: 降水Z指数, 多时间尺度, 小波分析, 河北省

Abstract: Based on the precipitation data from 73 weather stations in Beijing, Tianjin and Hebei province from 1961 to 2009, the characteristics of drought and flood were analyzed with methods of a trend analysis and a wavelet analysis. The results indicate that Z index of the annual precipitation is in a decreasing trend in recent 49 years and there exists multi-time scale characteristics. The cycles are 7years, 9 years and 15 years. Z index of summer precipitation is also in a decreasing trend and its cycle is 15 years, while Z indices of other seasons are in increasing trends and the significant cycles are 10-11 years.

Key words: Z index of precipitation, Multi-time scale, Wavelet analysis, Hebei province