Loading...
Please wait, while we are loading the content...
Similar Documents
Changes in the Distribution Pattern of $PM_{2.5}$ Pollution over Central China
| Content Provider | MDPI |
|---|---|
| Author | Shen, Lijuan Hu, Weiyang Zhao, Tianliang Bai, Yongqing Wang, Honglei Kong, Shaofei Zhu, Yan |
| Copyright Year | 2021 |
| Description | The extent of $PM_{2.5}$ pollution has reduced in traditional polluted regions such as the North China Plain (NCP), Yangtze River Delta (YRD), Sichuan Basin (SB), and Pearl River Delta (PRD) over China in recent years. Despite this, the Twain-Hu Basin (THB), which covers the lower flatlands in Hubei and Hunan provinces in central China, was found to be a high $PM_{2.5}$ pollution region, with annual mean $PM_{2.5}$ concentrations of 41–63 $μg·m^{−3}$, which is larger than the values in YRD, SB, and PRD during 2014–2019, and high aerosol optical depth values (>0.8) averaged over 2000–2019 from the MODIS products. Heavy pollution events (HPEs) are frequently observed in the THB, with HPE-averaged concentrations of $PM_{2.5}$ reaching up to 183–191 $μg·m^{−3}$, which exceeds their counterparts in YRD, SB, and PRD for 2014–2019, highlighting the THB as a center of heavy $PM_{2.5}$ pollution in central China. During 2014–2019, approximately 65.2% of the total regional HPEs over the THB were triggered by the regional transport of $PM_{2.5}$ over Central and Eastern China (CEC). This occurred in view of the co-existing HPEs in the NCP and the THB, with a lag of almost two days in the $THB-PM_{2.5}$ peak, which is governed by the strong northerlies of the East Asian monsoon (EAM) over CEC. Such $PM_{2.5}$ transport from upstream source regions in CEC contributes 60.3% of the surface $PM_{2.5}$ pollution over the THB receptor region. Hence, a key $PM_{2.5}$ receptor of the THB in regional pollutant transport alters the distribution patterns of $PM_{2.5}$ pollution over China, which is attributable to the climate change of EAMs. This study indicates a complex relationship between sources and receptors of atmospheric aerosols for air quality applications. |
| Starting Page | 4855 |
| e-ISSN | 20724292 |
| DOI | 10.3390/rs13234855 |
| Journal | Remote Sensing |
| Issue Number | 23 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-30 |
| Access Restriction | Open |
| Subject Keyword | Remote Sensing Environmental Sciences the Yangtze River Middle Basin Heavy Pm2.5 Pollution Regional Transport East Asian Monsoon |
| Content Type | Text |
| Resource Type | Article |
