巴音布鲁克草原植被生长气象条件指数变化特征

利用巴音布鲁克气象站1958--2012年4—9月各旬日照、气温、降水量资料，应用模糊数学方法，构造了影响巴音布鲁克天然草地植被生长的光、热、水函数，计算植被生长气象条件指数，分析了光照、热量、水分条件指数及综合气象条件指数的变化特征。结果表明，巴音布鲁克草地植被生长的光照条件较稳定，热量和水分条件是限制因子，热量条件呈明显线性增加的趋势，水分条件年际波动较大，无明显线性趋势；综合气象条件指数年际波动大，气候倾向率分析呈明显线性增加的趋势，2004年发生了明显的增加突变，近10a气象条件有利于草原植被生长。

The meteorological conditions index variation characteristics of grassland vegetation growth over Bayinbuluke

Abstract: Based on the sunshine, temperature and precipitation data from Bayanbulak weather station in April-September 1958-2012, fuzzy mathematical method is used to construct a sunlight, heat, water function which affect natural grassland vegetation growth, to calculate vegetation growth index , to analysis the variation characteristics of light, heat, moisture conditions index and synthesized meteorological conditions index. The results showed that the light condition is stable, while heat and moisture conditions are limiting factors in vegetation growth of grassland over Bayinbuluke. The heat condition showed a significant increased linear trend; the inter-annual fluctuations of moisture conditions is relatively large, but no significant linear trend; synthesized meteorological condition index showed large fluctuations; the rate of climate trend showed a significant increasing linear trend, a significant increasing mutation occurred in 2004. The meteorological conditions are conducive to the growth of grassland vegetation in nearly one decade.