Spatio-Temporal Variation of PM2.5 Concentrations and Their Relationship with Geographic and Socioeconomic Factors in China
2. Data Acquisition
2.1. PM2.5 Data
2.2. Population Data
2.3. GDP Data
2.4. Land-use Data
- Step 1:
- Evaluate the spatio-temporal variation of PM2.5 concentrations in China from 2001 to 2010 based on annual average PM2.5 grids.
- Step 2:
- Compare the distribution of PM2.5 concentrations with each of the following factors: urban areas, population and GDP. The impact of each factor on the PM2.5 concentrations was analyzed and compared.
- Step 3:
- Use the GWR method to evaluate the relationships between the PM2.5 concentrations and the urban areas, population and GDP.
4. Results and Analysis
4.1. Spatio-temporal Variation of PM2.5 Concentrations in China
4.2. Correlation between PM2.5 Concentrations and Socioeconomic Issues
|R *||Correlation||R *||Correlation|
- In general, the spatial pattern of PM2.5 concentrations in China has remained stable during the period 2001–2010. The area of the IT-1 level defined by the WHO (annual mean PM2.5 concentration in excess of 35 µg/m3) slowly increased by 7.2%/a on average from 2001 to 2007 and decreased by 7.5%/a on average from 2007 to 2010.
- PM2.5 is mostly concentrated in regions with high populations, GDP and large urban regions, including the Beijing-Tianjin-Hebei region in north China, east China (including the Shandong, Anhui and Jiangsu provinces), the Henan province. The Sichuan basin is one exception to this result.
Conflicts of Interest
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Lin, G.; Fu, J.; Jiang, D.; Hu, W.; Dong, D.; Huang, Y.; Zhao, M. Spatio-Temporal Variation of PM2.5 Concentrations and Their Relationship with Geographic and Socioeconomic Factors in China. Int. J. Environ. Res. Public Health 2014, 11, 173-186. https://doi.org/10.3390/ijerph110100173
Lin G, Fu J, Jiang D, Hu W, Dong D, Huang Y, Zhao M. Spatio-Temporal Variation of PM2.5 Concentrations and Their Relationship with Geographic and Socioeconomic Factors in China. International Journal of Environmental Research and Public Health. 2014; 11(1):173-186. https://doi.org/10.3390/ijerph110100173Chicago/Turabian Style
Lin, Gang, Jingying Fu, Dong Jiang, Wensheng Hu, Donglin Dong, Yaohuan Huang, and Mingdong Zhao. 2014. "Spatio-Temporal Variation of PM2.5 Concentrations and Their Relationship with Geographic and Socioeconomic Factors in China" International Journal of Environmental Research and Public Health 11, no. 1: 173-186. https://doi.org/10.3390/ijerph110100173