| Autor: |
YANG Peng, ZHANG Hong, WANG Shuibing, HONG Xingyuan, ZHU Sen, BAO Xiang, QIN Zhiyong |
| Zdroj: |
Environmental Science & Technology (10036504); Feb2020, Vol. 43 Issue 2, p52-59, 8p |
| Abstrakt: |
Based on the monitoring data of PM2.5 obtained from national control stations during 2015-2018, this paper analyzes the annual change trend of PM2.5 concentration in different regions of Anhui Province, among which the PM2.5 concentration in the middle areas is the largest, followed by the south areas, and the PM2.5 concentration in the north areas is relatively small, indicating the pressure for improving the ambient air quality is large. Analysis of PM2.5 concentration distribution in January 2015-2018 and the backward trajectory of pollution sources indicate that the upper reaches of the air flow track in the north areas of the Province are generally the areas with higher pollution degree, while the air flow track sources in the middle and south areas are relatively scattered. Through emission reduction test simulated by WRF-NAQPMS regional model, the contribution rate of endogenous source to the concentration of PM2.5 in the whole province is 29%, while the contribution rate of endogenous source in the north of the Province is 23%. The results show that the contribution rate of endogenous source to the north of Anhui Province is lower than the average, and the contribution of exogenous transport to the north areas is higher than other regions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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