Nature Environment and Pollution Technology

Open Access Open Access  Restricted Access Subscription Access

Spatio-Temporal Variations of Urban NO2 Concentrations in China


Affiliations
1 College of Geography Science, Nanjing Normal University, 1st Wenyuan Road, Nanjing 210046, China
2 Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73st East Beijing Road, Nanjing 210008, China
 

The spatial and temporal characteristics of NO2 concentration were analysed from 31 cities in China over a six-year period (2003-2008). Urban NO2 concentrations were in the range of 12-73μg/m3, and its pollution levels had an expanding trend in the temporal variations during 2003-2008. Spatially, there was an evident difference for urban NO2 concentration in the three regions of the eastern, central and western China. NO2 concentrations in cities had a significant reduction in eastern China, an obviously heightened trend in central China and a small heightened trend in western China due to the combined effects of industrial structural transformation and industrial upgrading, as well as control measures.

Keywords

Urban NO2 Concentration, Spatial Variation, Temporal Variation, China.
User
Notifications
Font Size


Abstract Views: 195

PDF Views: 0




  • Spatio-Temporal Variations of Urban NO2 Concentrations in China

Abstract Views: 195  |  PDF Views: 0

Authors

Fangshu Gao
College of Geography Science, Nanjing Normal University, 1st Wenyuan Road, Nanjing 210046, China
Ying Peng
Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73st East Beijing Road, Nanjing 210008, China
Guoxiang Wang
College of Geography Science, Nanjing Normal University, 1st Wenyuan Road, Nanjing 210046, China
Yi Qian
College of Geography Science, Nanjing Normal University, 1st Wenyuan Road, Nanjing 210046, China

Abstract


The spatial and temporal characteristics of NO2 concentration were analysed from 31 cities in China over a six-year period (2003-2008). Urban NO2 concentrations were in the range of 12-73μg/m3, and its pollution levels had an expanding trend in the temporal variations during 2003-2008. Spatially, there was an evident difference for urban NO2 concentration in the three regions of the eastern, central and western China. NO2 concentrations in cities had a significant reduction in eastern China, an obviously heightened trend in central China and a small heightened trend in western China due to the combined effects of industrial structural transformation and industrial upgrading, as well as control measures.

Keywords


Urban NO2 Concentration, Spatial Variation, Temporal Variation, China.