PROGRESS IN GEOGRAPHY ›› 2013, Vol. 32 ›› Issue (6): 880-886.doi: 10.11820/dlkxjz.2013.06.004

• Global Change • Previous Articles     Next Articles

Relationship between annual runoff of the mainstream of Tarim River and sunspots activity

XI Xiumei1,2, LIU Hailong3   

  1. 1. College of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, China;
    2. College of Science, Shihezi University, Shihezi 832003, China;
    3. College ofWater Conservancy and Architectural Engineering, Shihezi University, Shihezi 832003, China
  • Received:2012-12-01 Revised:2013-04-01 Online:2013-06-25 Published:2013-06-25

Abstract: In this paper, we used Morlet wavelet transform method to analyze the relationship between annual runoff in the mainstream of the Tarim River and sunspots activity dring 1957-2011. Results indicated that both annual runoff of the mainstream of Tarim River and number of sunspots were decreased dring 1957-2011. There were main periods of 4 a, 8 a, 18 a, and 21 a in annual runoff. On the scales of 8~9 a and 18~21 a, the annual runoff and number of sunspots had similar primary cycles. Sunspots activity had almost no effect on the characteristics of annual runoff change of the 4 a cycle, but the characteristics of the 18~21 a cycle were mainly influenced by sunspots activity. The annual runoff change of 8 a primary cycle was once closely related to sunspots activity, but the correlation was disrupted after 1980 due to strong interferences of human activities. This paper forecasts that 2012-2020 may be a withered water period for annual runoff in the mainstream of Tarim Riverin, and the average annual runoff may be about 35×108~40×108 m3

Key words: annual runoff, mainstream of the Tarim River, sunspots number, wavelet analysis