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SCIENTIA GEOGRAPHICA SINICA >

2007 , Vol. 27 >Issue 6: 796 - 800

DOI: https://doi.org/10.13249/j.cnki.sgs.2007.06.796

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

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  • 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 date: 2006-05-18

  Revised date: 2006-10-09

  Online published: 2007-11-20

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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.

Cite this article

YUAN Shu-Jie, MIAO Qi-Long, GU Xiao-Ping, QIU Xin-Fa, ZHOU Tao, KANG Wei-Min . Analysis on the Spring Drought in the Karst Region of Yunnan and Guizhou Plateau in China[J]. SCIENTIA GEOGRAPHICA SINICA, 2007 , 27(6) : 796 -800 . DOI: 10.13249/j.cnki.sgs.2007.06.796

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