地理科学

地理科学 ›› 2007, Vol. 27 ›› Issue (6): 796-800.doi: 10.13249/j.cnki.sgs.2007.06.796

• 论文 • 上一篇    下一篇

中国云贵高原喀斯特地区春旱特征分析

袁淑杰1,2,3, 缪启龙1, 谷晓平3, 邱新法1, 周涛3, 康为民3   

  1. 1. 南京信息工程大学江苏省气象灾害重点实验室, 江苏, 南京, 210044;
    2. 河北农业大学植物保护学院, 河北, 保定, 071001;
    3. 贵州省山地气候与资源重点实验室, 贵州, 贵阳, 550002
  • 收稿日期:2006-05-18 修回日期:2006-10-09 出版日期:2007-11-20 发布日期:2007-11-20
  • 基金资助:
    由中国气象局科技项目;贵州省长基金项目资助

Analysis on the Spring Drought in the Karst Region of Yunnan and Guizhou Plateau in China

YUAN Shu-Jie1,2,3, MIAO Qi-Long1, GU Xiao-Ping3, QIU Xin-Fa1, ZHOU Tao3, KANG Wei-Min3   

  1. 1. Jiangsu Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044;
    2. College of Plant Protection, Agricultural University of Hebei, Baoding, Hebei 071001;
    3. Guizhou Key Lab of Mountounious Climate and Resources, Guiyang, Guizhou 550002
  • Received:2006-05-18 Revised:2006-10-09 Online:2007-11-20 Published:2007-11-20

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52

摘要： 利用1951~2004年54年88个站3~5月日降水量资料,计算云贵喀斯特地区春旱强度指数,对该区春旱强度指数时间序列进行小波分析,揭示云贵喀斯特地区春旱强度指数变化的多时间尺度的复杂结构。结果表明:全区范围内春旱强度指数序列变化具有明显的周期和突变点,春旱强度指数存在22年左右的周期特征。特重区、严重区13~15年的周期也很显著,并存在2~3年的主周期;中旱区和轻旱区还具有9~11年的周期,存在3~4年的主周期。根据主周期进行预测,特重区、严重区干旱程度将加重;轻旱区、中旱区干旱程度将减轻。同时还分析了春旱的分布特征、形成的环流场和物理因子。

Abstract: Using the daily precipitation data from March to May of 88 stations from 1951 to 2004 in the karst region of Yunnan and Guizhou Plateau(KRYGP),the indexes of the spring drought intensity(ISDI)are calculated.The temporal series of the ISDI are analyzed by Morlet wavelet function.The complex multi-time scale structure of the ISDI variation is studied.The results show that the ISDI sequence variations have the discontinuity points and apparent 22-yearly periods in all regions.They have obvious 13-15(9-11)-year periods,with 2-3(3-4)-year as the most pronounced period in extra-severe and severe drought regions(medium and light drought ones).The drought degree will get heavier(lighter) in extra-severe and severe drought regions(medium and light drought ones) by period forecast.We also study the spring drought’s spatial and temporal feature,circulation forms and physical factors.

中图分类号: 

  • S423