生态环境学报2017，Vol.26Issue(11)：1924-1934,11.DOI:10.16258/j.cnki.1674-5906.2017.11.013
中原城市群城市化程度对气溶胶时空分异的影响
Effect of Urbanization on the Spatio-temporal Distribution of Aerosols in Zhongyuan Metropolitan Area
摘要
Abstract
Aerosol optical depth (AOD) was calculated from 2016 MODIS L2 data using a dark pixel algorithm, while LANDSAT 8 images were used for land use classification by visual interpretation. The effect of urbanization on the spatio-temporal distribution of aerosols in Zhongyuan metropolitan area was analyzed. The results showed that the AOD data was obviously different from season to season. Mean AOD was largest in spring (0.652), followed by autumn (0.461), summer (0.456), and winter (0.321). Taking the south side of Taihang Mountain, the east side of Funiu Mountain and North side of Tongbai mountain as the dividing line, the spatial distribution of AOD decreased from east to west. The area of construction land was positively correlated with mean annual AOD (correlation coefficient=0.467,F=325.090,P=0.000). Variation in AOD was highest in autumn and lowest in winter. 10 km×10 km was the smallest quadrat unit for the Zhongyuan metropolitan area. When the proportion of construction land area was1.03%~3.05%, the relationship between construction land area and AOD was significantly positive (correlation coefficient=0.369,F=30.364, P=0.000), and the power function model had the best goodness of fit. However, when the proportion of construction land area was 11.17%~74.49%, it had a weaker positive correlation with AOD (correlation coefficient=0.143,F=0.020,P=0.029), and the linear model had the best goodness of fit. When the proportion of construction land area was 0%~1.02%, it had a significant positive correlation with spring AOD. When it was 1.03%~3.05% and 11.17%~74.49%, construction land area had a significant positive correlation with winter AOD. As for the range 3.06%~11.16%, construction land area had a significant positive correlation with summer AOD. In summary, the seasonal spatial distribution of AOD was affected by the degree of urbanization and by the natural topography of the study area, from west mountains to the eastern plain.关键词
城市化/气溶胶光学厚度/时空分异/MODIS/中原城市群Key words
urbanization/aerosol optical depth/spatio-temporal distribution/MODIS/Zhongyuan metropolitan area分类
资源环境引用本文复制引用
段彦博,田国行,吴宝军,马格,刘正威,雷雅凯..中原城市群城市化程度对气溶胶时空分异的影响[J].生态环境学报,2017,26(11):1924-1934,11.基金项目
国家自然科学基金项目(31600579) （31600579）
河南省科技攻关项目(162102310093) （162102310093）
河南农业大学博士科研启动项目(30600407) （30600407）
