1961-2010年海南岛日照时数时空变化特征及其影响因素  

Spatiotemporal characteristics of sunshine hours and their effecting factors in Hainan Island during 1961- 2010

作　　者：陈小敏[1] 陈汇林[1] 邹海平[1] 

机构地区：[1]海南省气象科学研究所,海南海口570203

出　　处：《自然灾害学报》2014年第1期161-166,共6页Journal of Natural Disasters

基　　金：农业科技成果转化资金项目(SQ2011EC4160003);公益性行业(气象)科研专项(GYHY201206019);海南省气象局科技创新项目(HN2013MS12)

摘　　要：对1961-2010年海南岛的年日照时数进行时空变化分析,并对年日照时数、月份和季节变化特征进行气候变化倾向率分析。结果表明:(1)海南岛年日照时数空间分布差异较为显著,东北向西南逐渐增多;(2)日照时数年际变化幅度较大,峰值点(1977年)与谷值点(2008年)相差573.7h。近50年来日照时数变化总体呈减少趋势,其气候变化倾向率为每10a减少50.9h,月份和季节日照时数分布不均匀,且总体都处于下降趋势。年际日照时数时空变化来看,海南岛2/3以上市县呈现下降趋势。年、季和月日照时数减少与该地区低云量增加有密切关系。This paper analyzed the spatiotemporal change of sunshine duration in Hainan Island during 1961 - 2010, and the climate change tendency rate of the annual, seasonal, monthly variation characteristics of the sun-shine duration. The results indicate that, sunshine duration in northeast is less than southwest in Hainan; the inter annual variation amplitude is obviously greater, and the sunshine difference between peak point, the year 1977, and valley point the year, 2008, is up to 573.7 h ; in recent 50 years, the sunshine hours decreased at the rate of 50.9h/10a; the distribution of monthly and seasonal sunshine hours is also non-uniform and present a decrease tendency in general. More than two-third cities and counties show decreased annual sunshine duration. Annual, seasonal, monthly decreased sunshine duration is related to the increase of low-level cloud amount.

关 键 词：日照时数 气候变化 倾向率 低云量 海南岛 

分 类 号：P49[天文地球—大气科学及气象学]