生态环境学报2016，Vol.25Issue(1)：103-111,9.DOI:10.16258/j.cnki.1674-5906.2016.01.015
2013-2014年北京地区PM2.5时空分布规律及其与植被覆盖度关系的研究
Temporal and Spatial Distribution of PM2.5 and Its Relationship with Vegetation Coverage in Beijing during the Period of 2013─2014
摘要
Abstract
Beijing is currently facing serious air pollution problems, which damages human health, and it has aroused people's wide attention. At present, there are some shortcomings in the research of PM2.5 in Beijing, such as the observation point is less, the time scale is short and so on. This study collects the monthly and quarterly PM2.5 data from 35 automatic air quality monitoring stations in Beijing during the period of 2013─2014. Combined with spatial information, we can obtain more representative spatial and temporal distribution characteristics of PM2.5 in Beijing. Based on the 2920 tiles MODIS/NDVI images of 2013 January to 2014 December in Beijing, and by using the method of Local Maximum Filtting and calculated the vegetation coverage from NDVI. Then this study conducted the regression analysis based on the data of PM2.5 and vegetation coverage in 2013 and 2014,and obtained the spatial distribution of vegetation coverage in Beijing and its surrounding areas in 2013 and 2014, and compared the changed area of vegetation cover in Beijing that aim to illustrate the relationship between the PM2.5 and vegetation coverage. The results showed that (1) From the time variation characteristics of PM2.5 concentration, the monthly mean PM2.5 concentration showed a wave type distribution, and the seasonal mean analysis showed that the highest concentration in winter and the lowest in summer, and the concentration of PM2.5 changed regularly with the seasons. (2) From the PM2.5 concentration spatial distribution law, the southeast of the most serious, the northwest of the lightest, the degree of pollution from south to North in descending order. (3) From the time and space distribution characteristics of PM2.5 concentration, it is found that the higher the PM2.5 concentration is, the greater the difference is, the higher the concentration is, the greater the time is. (4) We got the regression equation and found that highly correlated between PM2.5 and vegetation coverage. (5) The increase of the vegetation area has a positive effect on the decrease of PM2.5.Those conclusion scan provide significant scientific basis for air pollution control and environmental protection in Beijing.关键词
PM2.5/植被覆盖度/时空分布/大气污染/北京Key words
PM2.5/vegetation coverage/temporal and spatial distribution/air pollution/Beijing分类
资源环境引用本文复制引用
王嫣然,张学霞,赵静瑶,姜群鸥..2013-2014年北京地区PM2.5时空分布规律及其与植被覆盖度关系的研究[J].生态环境学报,2016,25(1):103-111,9.基金项目
北京市共建项目专项资助；国家林业公益性行业重大科研专项 （）
