摘要
根据上海市1999～2002年间逐时能见度资料的分析,建立了上海市大气能见度等级.通过对影响能见度变化的气象因子和污染因子分析,结果表明,影响能见度的因子主要是污染、云量和相对湿度以及天气状况.在此基础上,建立了上海市大气能见度指数指标体系,并对各等级能见度的主要影响因素进行了探讨,发现当能见度等级为差时,影响能见度的因子按其重要性由大到小依次为污染因子、云量和相对湿度因子、天气状况因子;当能见度等级为较差时,3种因子作用相当;当能见度等级为中等及较好时,天气状况因子作用最大;当能见度等级为好时,不需要说明其影响因子.
Based on the analysis of history data of hourly visibility from 1999 to 2002,the visibility class for Shanghai City was established, Through the analysis of meteorological and contaminative factors affecting the change of visibility. The main factors affecting the visibility were contamination, cloudage, relative humidity and weather condition. Based on these, the visibility index-classified system of Shanghai City atmosphere was established; and the main factors affecting each visibility class were discussed. While the visibility is bad, elements arranged according to their importance impacting the visibility are as follows, pollutants, cloudage and relative humidity and weather condition; while the visibility is baddish, the three ones do the same; while the visibility is medium, weather condition plays the most important role, and the visibility is good, there is no necessity to give out the impacting elements.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2005年第4期460-464,共5页
China Environmental Science
基金
国家自然科学基金资助项目(40181077)
教育部重点基金资助项目
上海市政府科技专项资金攻关项目
上海市科委科研计划项目(035115006)
关键词
能见度指数
消光系数
分视指数
因子分析
visibility index
extinction coefficient
deciview
component Analysis
