沙尘天气影响因素的灰色关联分析

Preliminary Analysis on Sandstorm Related Factors Based on Gray Correlation Theory

  • 摘要: 自20世纪80年代中期以来,西藏沙尘天气显著减少,呈下降趋势,为探究造成这一变化趋势的原因,利用日喀则市1992~1995年的气象数据,运用灰色系统理论中的关联分析方法,研究了各因子对沙尘天气的影响程度,发现气温、植被及风速对沙尘天气的影响贡献最大,气候变暖、植被面积增加有助于减少沙尘.

     

    Abstract: Some researches demonstrate that the mean annual days with sandstorm weather conditions in Tibet has been decreasing remarkably since the mid 1980's. Based on the meteorological data observed between 1992 and 1995, the correlations among the meteorological factors and the sandstorm weather conditions in Rikazhe City were analyzed by means of correlation analysis of Grey System Theory. The conclusions were as follows:Temperature, vegetation cover and wind velocity made the most important contribution to formation of sandstorm weather.The global warming effect, and the increment of the vegetation coverage were beneficial to reduce sandstorm weather conditions.

     

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