Using Lidar technology to assess regional air pollution and improve estimates of PM2.5 transport in the North China Plain
文献类型：期刊论文
| 作者 | Xiang,Yan1,3,4; Lv,Lihui1,3; Chai,Wenxuan2; Zhang,Tianshu1,3 ; Liu,Jianguo3; Liu,Wenqing1,3
|
| 刊名 | Environmental Research Letters
 |
| 出版日期 | 2020-08-27 |
| 卷号 | 15 |
| 关键词 | aerosols regional transport lidar WRF-Chem, GSI data assimilation |
| DOI | 10.1088/1748-9326/ab9cfd |
| 通讯作者 | Xiang,Yan() |
| 英文摘要 | AbstractAir pollutants seriously impact climate change and human health. In this study, the gridpoint statistical interpolation (GSI) three-dimensional variational data assimilation system was extended from ground data to vertical profile data, which reduced the simulation error of the model in the vertical layer. The coupled GSI-Lidar-WRF-Chem system was used to improve the accuracy of fine particulate matter (PM2.5) simulation during a wintertime heavy pollution event in the North China Plain in late November 2017. In this experiment, two vehicle-mounted Lidar instruments were utilized to make synchronous observations around the 6th Ring Road of Beijing, and five ground-based Lidars were used for long-term network observations on the North China Plain. Data assimilation was then performed using the PM2.5 vertical profile retrieved from the seven Lidars. Compared with the model results, the correlation of assimilation increased from 0.74–0.86, and the root-mean-square error decreased by 36.6%. Meanwhile, the transport flux and transport flux intensity of the PM2.5 were analyzed, which revealed that the PM2.5 around the 6th Ring Road of Beijing was mainly concentrated below 1.8 km, and there were obvious double layers of particles. Particulates in the southwest were mainly input, while those in the northeast were mainly output. Both the input and output heights were around 1 km, although the input intensity was higher than the output intensity. The GSI-Lidar-WRF-Chem system has great potential for air quality simulation and forecasting. |
| 语种 | 英语 |
| 出版者 | IOP Publishing |
| WOS记录号 | IOP:1748-9326-15-9-AB9CFD |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/104991]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xiang,Yan |
| 作者单位 | 1.Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 2.Air Monitoring Department, China National Environmental Monitoring Center, Beijing 100012, People’s Republic of China 3.Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People’s Republic of China 4.Author to whom any correspondence should be addressed. |
| 推荐引用方式 GB/T 7714 | Xiang,Yan,Lv,Lihui,Chai,Wenxuan,et al. Using Lidar technology to assess regional air pollution and improve estimates of PM2.5 transport in the North China Plain[J]. Environmental Research Letters,2020,15. |
| APA | Xiang,Yan,Lv,Lihui,Chai,Wenxuan,Zhang,Tianshu,Liu,Jianguo,&Liu,Wenqing.(2020).Using Lidar technology to assess regional air pollution and improve estimates of PM2.5 transport in the North China Plain.Environmental Research Letters,15. |
| MLA | Xiang,Yan,et al."Using Lidar technology to assess regional air pollution and improve estimates of PM2.5 transport in the North China Plain".Environmental Research Letters 15(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。