主成分分析和GIS技术在沈阳大气环境时空特征研究中的应用

在广泛收集整理相关资料和数据基础上,运用主成分分析法和GIS SuperMap技术对沈阳市2002—2010年大气污染物SO2、NO2、PM10年均值和8个环境监测站点2002—2010年的SO2、NO2、PM10年均值进行分析,结果表明:在时间变化方面,大气主要污染物的年均值在逐年下降,大气质量在近9年间逐渐转好,2007—2009年污染指数的月平均值变化曲线清晰呈现出两头高中间低的"U"字型变化趋势;在空间变化方面,从市中区到近郊区再到远郊区有逐渐减弱的趋势,市中心的太原街、小河沿的环境质量逐年转好,但市郊区的环境质量在逐年下降。

APPLICATION OF PRINCIPAL COMPONENT ANALYSIS AND GIS IN STUDY ON SPATIAL AND TEMPORAL CHARACTERISTICS OF AIR ENVIRONMENT IN SHENYANG CITY

Collecting relevant information and data,using the combined method of principal component analysis and GIS SuperMap technology,it was analyzed 2002-2010 annual average of air pollutants SO2,NO2,PM10 and eight environmental monitoring sites in Shenyang city.The results showed that with the time going by the average annual concentration of major pollutants in the atmosphere was decreasing year by year,in the past 9 years,air quality gradually turning better,2007-2009 the average monthly pollution index curves clearly showed the "U" shaped trend;the spatial variation in the area from the city to suburban areas the trend waning year by year,the environmental quality of Taiyuan Street and Xiaoheyan was turning better year by year,and the environmental quality of the outskirts was declining.