摘要
根据沿海23个城市2001年6月至2005年6月四年的空气污染指数(API)资料,利用聚类分析和时间序列分析对API值及首要污染物数据进行统计分析,利用相关性分析探讨API值和气象因素的关系,初步揭示了中国沿海城市API的变化特征。聚类分析的结果可将研究区域分为北部、东南部和南部三个区域。中国沿海区域的API都明显受到降水和风速的影响,API与降水普遍成负相关,与风速成正相关。指出采暖期燃煤对北方地区冬季API的增大有显著影响。北部城市明显受沙尘暴天气的影响,东南部受季风和降雨因素的影响,南部受海洋性气候的季节性风力和降水影响,各区域API呈现出季节性变化。
Based on four consecutive years＇ API（air pollution index）data of 23 coastal cities from June 2001 to June 2005, the data of API and primary pollutant are analyzed using cluster and time series analysis methods, and the relationship between API and meteorological factors is studied adopting correlation analysis method, which shows the API variety characteristics of coastal cities. The results of cluster analysis indicate that those cities can be divided into three zones, which are the North, Southeast and South regions. The API of coastal cities is apparently influenced by precipitation and wind velocity, in which the API shares a negative correlation with precipitation while it has a positive correlation with wind velocity. This paper shows that the increase of the North API obtained in winter season highly rely on burning of fusil fuels during heating period, the northern cities are clearly affected by sand storms, the southeastern cities are influenced by precipitation and seasonal winds and the southern cities are impacted by precipitation and seasonal winds caused by subtropical oceanic climate factors. Thus, The API in each region is changing seasonally.
出处
《生态环境》
CSCD
北大核心
2008年第2期542-548,共7页
Ecology and Environmnet
基金
国家自然基金重大项目(40490262)
国家重点基础研究发展规划项目(2006CB403703)
新世纪优秀人才支持计划(NCET-04-0639)
