【摘要】 利用塔额盆地4个常规气象台站1960—2009年的实测资料,分析塔额盆地日照时数的年平均变化、季节变化及年际变化规律,并通过Mann-Kendall法进行年平均日照时数变化的突变检验。结果表明:近50年来,塔额盆地年平均日照时数以2.9 h/10 a的气候倾向率波动式增加;日照时数的增加主要表现在春、夏、秋季,尤其是春季最为明显;塔额盆地年平均日照时数存在2个突变点;日照时数与总云量、低云量及≥0.1 mm的降水日数之间具有很好的负相关性,其中总云量与日照时数的相关性最好。更多还原

【Abstract】 Based on observed data of 4 meteorological stations in Ta′e Basin from 1960 to 2009,this paper analyzed the variation characteristics of annual,seasonal and inter-annual sunshine hours in this region,the series of the sudden change points of sunshine hours were confirmed by Mann-Kendall method.The results indicated that the sunshine hours had some fluctuated increasing trend with the climate tendency annual sunshine hours of 2.9h/10a;Meanwhile,it performed clearer increasing in spring,summer and autumn,especially in spring;Average annual sunshine hours had two sudden change points.There was close negative correlation among sunshine hours,total/low cloud amount and precipitation days with≥0.1 mm precipitation,and the correlations between sunshine hours and total cloud amount weights most.更多还原