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Position: Home > Articles > Analysis on Variation of Sunshine Hours in Xilinhaote City Chinese Journal of Agrometeorology 2012,33 (3) 333-339

锡林浩特市日照时数的气候变化特征分析

作  者:
贺俊杰;黄凤茹
单  位:
内蒙古锡林郭勒盟气象台;内蒙古锡林浩特国家气候观象台
关键词:
日照时数;变化趋势;气候倾向率;突变;锡林浩特
摘  要:
利用锡林浩特市50a(1961-2010)日照时数以及总云量、低云量、降水量和水汽压等资料,采用气候倾向率分析其变化趋势,利用滑动T检验法和累积距平结合的方法进行突变分析,并根据各气象要素的年、季变化趋势及其与日照时数变化趋势的对应关系对日照时数变化原因进行分析。结果表明,锡林浩特市年日照时数呈极显著增加趋势(P<0.01);从年代际变化看,20世纪60-90年代,年均日照时数呈持续增加趋势,90年代达到最大,进入21世纪后,年均日照时数则明显减少;四季中夏季日照时数呈极显著增加趋势(P<0.01)。各季日照时数偏少期为20世纪60-70年代,偏多期为80年代-21世纪初;各月日照时数均呈波动上升趋势,增加最多的为8月;年日照时数在1985年发生了由少到多的突变,季日照时数发生突变是导致年突变的原因,尤以春季和夏季最为显著;云量是决定日照时数增加的重要原因之一,日照时数增加还与夏季、冬季水汽压以及夏季和秋季降水量密切相关。
译  名:
Analysis on Variation of Sunshine Hours in Xilinhaote City
作  者:
HE Jun-jie1,HUANG Feng-ru2(1.Xilinhaote National Climatic Observatory,Xilinhaote 026000,China;2.Xilinguole Meteorological Bureau,Xilinhaote 026000)
关键词:
Sunshine hours;Change trend;Climate trend rate;Abrupt change;Xilinhaote
摘  要:
The variation of sunshine hours was analyzed by using climate trend method based on the data of sunshine hours,total cloud amount,low cloud cover,precipitation and vapor pressure from 1961 to 2010 in Xilinhaote city.The results showed that annual sunshine hours increased significantly(P<0.01).Furthermore,annual mean sunshine hours in decades from 1960s to 1990s increased and up to maximum value in 1990s,and decreased after the year of 2000.Sunshine hours in summer increased significantly(P<0.01).There were less sunshine hours in each season during 1960s and 1970s,and more sunshine hours in each season during 1980s to 2000s.Sunshine hours of each month increased fluctuately,and up to peak value in August.There was an abrupt change in 1985,which resulted from seasonal abrupt change,particularly in spring and summer.Besides,cloud amount was an important factor affected sunshine hours,and the increase of sunshine hours had a close relationship with vapor pressure in summer and winter,and precipitation in summer and autumn.

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