Climate Change Research ›› 2011, Vol. 7 ›› Issue (2): 123-128.

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Long-Term Variation Features of Global Solar Radiation in Nanning


  • Received:2010-07-26 Revised:2010-12-06 Online:2011-03-30 Published:2011-04-07
  • Contact: Shao-Yi ZHOU

Abstract: Based on the solar radiation observation data in Nanning from 1961 to 2009, the characteristics of solar radiation change for recent 49 years were investigated, by using the linear-trend estimate and the Mann-Kendall test. The results show that: 1) The global solar radiation overally showed a weakly decreasing tendency over the 49 years at a rate of 28.9 MJ/m2 per 10 years, with a main decreasing trend in the period 1961-1992, while an obvious increasing trend after 1993. 2) The global solar radiation generally decreased in spring, autumn and winter, especially in winter, while it increased weakly in summer. 3) The analysis results show that total cloud cover and visibility are the two important factors influencing the variations of global solar radiation in Nanning.

Key words: font-family: 'Times New Roman', mso-bidi-font-size: 12.0pt, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">global solar radiation, long-term variation, Mann-Kendall test

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