1980-2010年湖南安化山区大气能见度变化特征  

Change Features of Atmospheric Visibility in Anhua Mountainous Area of Hunan from 1980 to 2010

作　　者：李兵 夏石友 吴正好 谭青松 谌双军 

机构地区：[1]湖南省安化县气象局,湖南益阳413500

出　　处：《江西农业学报》2015年第6期125-129,133,共6页Acta Agriculturae Jiangxi

基　　金：湖南省气象局"短平快"科研项目;湖南省益阳市气象局科研课题资助

摘　　要：利用安化国家基本气象站1980-2010年大气能见度观测资料,选取不受气象因素影响的数据,利用百分位分析法、等级分析法、Ridit分析法和小波分析,研究了安化山区大气能见度的变化趋势。结果表明：安化大气能见度整体上呈下降趋势,＂较差＂大气能见度出现频率明显增加,20世纪90年代大气能见度水平反常优于80年代,这在很大程度上由人类活动和降水偏多造成的。相对国内其他大城市而言,安化山区年和季大气能见度年际波动特征十分显著,这与山区复杂的气候特征、地形地貌是分不开的。复Morlet小波分析表明,1980-2005年的年Ridit值周期变化比较明显,周期为7年左右。Based on the atmospheric visibility data observed at Anhua National Basic Meteorological Observatory from 1980 to 2010, the change trends of atmospheric visibility caused by only air pollution in Anhua mountainous area were studied by adopting percentile, grade, Ridit and complex Morlet wavelet analysis methods.The results showed that the atmospheric visibility in Anhua had declined in the past 31 years, and the frequency of “bad” visibility had an increasing trend.The atmospheric visibility in the 1990s was better than that in the 1980s, which was largely caused by human activities and more rainfall in the 1990s.The interannual fluctuant features of annual and seasonal atmospheric visibility in Anhua mountainous area were more remarkable than those in other big cities in China, due to the complicated climatic characteristics and complex topography of mountainous area.The complex Morlet wavelet analysis indicated that the annual Ridit value had obvious 7-year or so periodic changes from 1980 to 2005.

关 键 词：大气能见度 空气质量 百分位分析法 等级分析法 RIDIT分析法 小波分析 

分 类 号：P427.2[天文地球—大气科学及气象学]