摘要
利用1969年-2018年辽宁省51个气象站资料,采用趋势分析、不同气候期对比法和Mann-Kendall检验法,对辽宁省日照时数的时空分布特征、变化趋势及影响因子进行分析。结果表明,辽宁省年日照时数以31.8 h/10 a的速率显著减少,并于1982年发生突变。年日照时数的变化归因于四季日照时数的减少,其中秋季作用最为显著。辽宁省日照时数整体呈自西向东逐渐减少的经向分布,除东部偏南地区外,其余大部分地区的日照时数均呈明显减少趋势。日照时数与低云量、总云量和降水量均呈负相关关系,而与风速呈正相关关系。
To reveal the variation characteristics of sunshine duration in Liaoning province is of great importance for the decision making of the agricultural climate,agricultural production distribution and planting adjustment.By utilizing surface observation data collected at 51 national meteorological stations in Liaoning province from 1969 to 2018,as well as trend analyses,comparison methods for different climate periods,and the Mann-Kendall test method were used.This paper analyzed the temporal and spatial distribution characteristics of sunshine duration and the associated meteorological impact factors in Liaoning.The results indicated that the annual sunshine duration has a significant decreasing tendency with 31.8 hours per decade,with an abrupt change in 1982.The decrease of sunshine duration is mainly caused by the decrease of sunshine duration in four seasons,and autumn plays the most significant role.The sunshine duration in Liaoning province shows a longitudinal distribution gradually decreasing from west to east.Except that in the south-eastern areas,the sunshine duration in the other areas has a significant decreasing tendency.Sunshine duration is in a negative correlation with total cloud amount,low cloud amount and precipitation,and is in a positive correlation with wind speed.It could be concluded by the result that climate change and urbanization process have an important impact on sunshine duration in Liaoning province.
作者
李岚
林毅
王迪
张婉莹
王鹏
Li Lan;Lin Yi;Wang Di;Zhang Wanying;Wang Peng(Liaoning Meteorological Service Center, Shenyang 110166, China)
出处
《环境科学与管理》
CAS
2020年第8期44-48,共5页
Environmental Science and Management
基金
辽宁省气象局关键技术项目(LNGJ201904)共同资助。
关键词
日照时数
时空分布
气候倾向率
影响因素
辽宁省
sunshine duration
spatial and temporal distribution
climate trend rate
influential factors
Liaoning province
作者简介
李岚(1982-),女,硕士,高级工程师,研究方向:气象预报及服务。
