摘要
利用1980—2014年沈阳地区7个气象站月日照时数及年低云量、年总云量、年降水量和年降雨日数资料,采用气候倾向率法分析了沈阳地区年和季日照时数的气候变化特征,并对影响日照时数的因素进行了相关性分析.结果表明:1980—2014年沈阳地区年平均和季平均日照时数均呈减少的趋势,全市年平均日照时数每10 a减少74.5 h,2002年后年日照时数基本低于近35 a平均水平.四季日照时数每10 a减少11.8—27.1 h,减少幅度由大到小依次为夏季、秋季、春季和冬季.沈阳市日照时数空间上呈北多南少分布特征,全市各站日照时数均呈减少的趋势.年低云量、总云量、降水量和降雨日数均与年日照时数呈负相关关系,其中日照时数与低云量、总云量、降雨日数的关系更密切.
Based on monthly sunshine duration,annual lowcloud amount,annual total cloud amount,annual precipitation and number of annual precipitation days at 7 weather stations in Shenyang from 1980 to 2014,climate characteristics of annual and seasonal sunshine duration were analyzed by a climatic trend method. The correlation relationships were discussed between sunshine duration and its influencing elements. The results indicate that the annual and seasonal sunshine duration in Shenyang are in decreasing trends from 1980 to 2014. Annual mean sunshine duration in Shenyang reduces at the rate of 74. 5 h per decade,and it is less than average in the recent 35 years after 2002. There is a significantly decreasing tendency in seasonal sunshine duration at the rates of 11. 8- 27. 1 h per decade,and the order of decreasing amplitudes ranks from high to lowas summer,autumn,spring and winter.Spatial distribution of annual sunshine duration in Shenyang decreases from the north to south. Sunshine duration in each weather station is in a decreasing trend. Annual sunshine duration is in a significant negative correlation with precipitation,total cloud amount, lowcloud amount and number of precipitation days, especially with the latter three elements.
出处
《气象与环境学报》
2016年第2期89-94,共6页
Journal of Meteorology and Environment
基金
沈阳市农业科技攻关专项"沈阳市农业气象资源优劣等级的精细化分析"(S12-091-3-00)资助
关键词
日照时数
气候倾向率
相关分析
Sunshine duration
Climate trend rate
Correlation analysis
