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Advances in Atmospheric Sciences

, Volume 17, Issue 1, pp 18–30 | Cite as

Interannual and decadal variations of snow cover over Qinghai-Xizang Plateau and their relationships to summer monsoon rainfall in China

  • Chen Lieting
  • Wu Renguang
Article

Abstract

Interannual and decadal variations of winter snow cover over the Qinghai-Xizang Plateau (QXP) are analyzed by using monthly mean snow depth data set of 60 stations over QXP for the period of 1958 through 1992. It is found that the winter snow cover over QXP bears a pronounced quasi-biennial oscillation, and it underwent an obvious decadal transition from a poor snow cover period to a rich snow cover period in the late 1970’s during the last 40 years.

It is shown that the summer rainfall in the eastern China is closely associated with the winter snow cov-er over QXP not only in the interannual variation but also in the decadal variation. A clear relationship ex-ists in the quasi-biennial oscillation between the summer rainfall in the northern part of North China and the southern China and the winter snow cover over QXP. Furthermore, the summer rainfall in the four cli-mate divisions of Qinling-Daba Mountains, the Yangtze-Huaihe River Plain, the upper and lower reaches of the Yangtze River showed a remarkable transition from drought period to rainy period in the end of 1970’s, in good correspondence with the decadal transition of the winter snow cover over QXP.

Key words

Snow cover over Qinghai-Xizang Plateau Summer monsoon rainfall in China Interannual and decadal variations 

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Copyright information

© Advances in Atmospheric Sciences 2000

Authors and Affiliations

  • Chen Lieting
    • 1
  • Wu Renguang
    • 2
  1. 1.Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing
  2. 2.Department of MeteorologyUniversity of Hawaii at ManoaHonoluluUSA

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