摘要
利用空间统计分析方法(spatial statistics analysis),借助GIS工具分析重庆市3项大气污染物TSP、SO2和NOx浓度的空间分异特点。污染物在东北—西南方向上分布最为分散,经济重心与污染重心相差较远。在整体上SO2的空间自相关性很强,属集中分布模式;TSP的空间自相关性较弱,属随机分布模式;NOx处于两者之间。局部相关性分析表明,大部分区、县的大气污染物之间相关性较弱。通过两个年度的浓度动态变化比较,发现SO2和TSP都有明显的消减,但NOx浓度在局部地区仍在增加,增幅达164.2%,使其整体上几乎没有消减。
By employing the methods of spatial Statistics and the tools of GIS, this paper analyses the spatial differential features about three main atmospheric pollutants—— TSP（Total Suspended Particulates）, SO2 （Sulfur Dioxide） and NOx（Nitrogen Oxides）, with the conclusion that atmospheric pollutants present an uneven distribution state in the space of Chongqing City, especially along the direction of northeast and southwest,and that the weighted mean centers of TSP,SO2 and NOx,which are all fell in Fuling district,are far away from the weighed mean center of economy. As a whole, the distribution of TSP takes on a random pattern,of which NOx belongs to clustered pattern and SO2 stands in between TSP and NOx. The spatial autocorrelation among most districts of Chongqing is faint. By comparing the concentrations of three main pollutants in two years, it turns out that SO2 and TSP reduce distinctly, while NOx increases greatly in some areas to such a high extent as 164.2% ,which makes it almost unchanged as a whole.
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2005年第5期80-84,共5页
Geography and Geo-Information Science
基金
国家自然科学基金项目(40371092)
关键词
空间统计
空间分异
GIS
大气污染
重庆市
spatial statistics
spatial differential features
geographical information system
atmosphiric pollution
Chongqing City
