【摘要】 利用山东省1965～2009年共45年的地面气象观测资料,分析了山东省的日照时数时空变化特征。结果表明,山东省的日照时数在省内有明显的"两边高,中间低"的地域分布特征。山东省日照时数和全国其他地区变化趋势基本相同,有明显的逐年下降趋势。在20世纪60年代中期到80年代为高日照时数期,从90年代开始日照时数有明显减少趋势。1965～1989年山东日照下降最明显的地区分别在中部南北两个方向上,以临沂和东营为中心的区域内,日照时数气候倾向率约为-250 h/10 a。1990～2009年山东省日照时数下降较为缓慢的地区为西北部大部分区以及东部的一小块地区,气候倾向率在-70 h/10 a。更多还原

【Abstract】 By using the ground observation data in Shandong province from 1965 to 2009,the spatial and temporal variation features of sunshine hours in this area were studied.As indicated by the results,the sunshine hours showed an obvious geographic distribution of "high on both sides but low in middle".The change of sunshine hours in Shandong Province was basically the same as that in other areas in China,presenting significant declining tendency.The largest decrease of sunshine hours during 1965-1989 was found in the south and north of central Shandong with Linyi and Dongying as the center,and the climate tendency rate of sunshine hours was about-250 h/10 a.The smallest decrease was in the northwest and east area with the annual variation tendency of about-70 h/10 a.更多还原