1969—2008年海南省雾的气候特征与变化趋势  

Climatological Characteristics and Trends of Fogs in Hainan Province

作　　者：张春花[1,2] 吴胜安[3] 林建兴[2] 许向春[4] 郭冬艳[2] 

机构地区：[1]兰州大学大气科学学院,兰州730000 [2]海南省气象台,海口570203 [3]海南省气候中心,海口570203 [4]海南省气象科学研究所,海口570203

出　　处：《气候变化研究进展》2010年第5期349-355,共7页Climate Change Research

基　　金：海南省自然基金项目"海南雾预报方法研究"(40885)

摘　　要：利用海南省1969—2008年观测资料,对海南雾的时空分布气候特征及变化趋势进行分析,并利用观测的最低气温、相对湿度资料和NCEP/NCAR再分析资料对海南雾日数变化的成因加以分析。结果表明,海南雾日数在中部山区出现最多,其次是北部地区,南半部沿海地区则极少有雾出现;雾主要出现在9月至翌年3月,年雾日数呈减少趋势;最低气温升高是引起雾日数减少的主要原因,雾日数的减少与相对湿度的减小也是一致的;秋冬和初春季节夜间气温低,有利于雾的形成;海拔越高的地区,气温越低,则生成的雾越多;雾日数显著偏多年份850hPa大陆高压偏弱,偏少年份偏强;雾日数显著偏多年份500hPa西太平洋副高强度偏弱,范围偏小,偏少年份则相反。Climatological characteristics of the spatio-temporal distribution and change trend of fog days in Hainan Province were analyzed based on the observational data of Hainan in 1969-2008,and the causes for changes in fog days were also analyzed based on the NCEP/NCAR reanalysis data and meteorological factors. The results show that the fog days was the most in the central mountainous area,the next in the northern coastland,and the least in the southern coastland; and yearly fog days exhibited a decreasing trend. Analysis also indicates that yearly fog days was negatively closely correlated with average minimum temperature and positively correlated with relative humidity. Fogs formed more frequently and successively in autumn,winter and early spring. The regions with a higher altitude or a lower temperature had more fog days. In the years when fog days was more than normal,the 850 hPa continental high was relatively weaker,and the 500 hPa subtropical high was relatively weaker too; and vice versa in less fog days years.

关 键 词：雾 气候特征 变化趋势 成因 

分 类 号：P468.028[天文地球—大气科学及气象学]