Impacts of the near-surface urban boundary layer structure on PM2.5 concentrations in Beijing during winter
文献类型：期刊论文
| 作者 | Wang, LL (Wang, Linlin)1,2; Wang, H (Wang, Hong)2; Liu, JK (Liu, Junkai)1; Gao, ZQ (Gao, Zhiqiu)1; Yang, YJ (Yang, Yuanjian)2,3; Zhang, XY (Zhang, Xiaoye)4; Li, YB (Li, Yubin)2; Huang, M (Huang, Meng)2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2019-06-15 |
| 卷号 | 669页码:493-504 |
| 关键词 | PM2.5 Boundary layer structure Mixing turbulence Near-surface layer Beijing |
| 产权排序 | 3 |
| 英文摘要 | The Urban Boundary layer (UBL) structure plays an important role in the accumulation of air pollutants in cities. To understand how the near-surface UBL structure affects air pollutants, we analyzed 40-day vertical observations collected at a 325-m meteorology tower in Beijing from 1 December 2016 to 9 January 2017. The occurrences of heavy pollution episodes (HPEs) in the study period were closely associated with weak wind speed (WS), high temperature, high relative humidity, weak fraction velocity (u∗) and weak turbulence kinetic energy (TKE) in near-surface UBL. In particular, the thickness and intensity of the temperature inversions were enhanced during all HPEs at nighttime. In addition, the PM2.5 concentration at the ground was significantly negative/positive correlation with vertical dynamic factors (e.g., WS, u∗ and TKE)/temperature inversion in the near-surface UBL. Diurnal variations in the vertical WS, potential temperature (θ), u∗ and TKE were less evident on the 23 polluted days than those on the 14 clean days; specifically, there were larger differences in the WS and θ between polluted and clean days at higher levels. Note that the varying quantitative relationships between the observed PM2.5 concentration and UBL dynamic factors during the daytime were much more significant than those at nighttime at all vertical levels. Compared with the WS, u∗ and TKE, the PM2.5 concentration showed a much more sensitive change with u∗ (WS) during the daytime (at nighttime). |
| 语种 | 英语 |
| 源URL | [http://ir.ieecas.cn/handle/361006/10970]  |
| 专题 | 地球环境研究所_黄土与第四纪地质国家重点实验室（2010~） |
| 作者单位 | 1.State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; 2.Collaborative Innovation Centre on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing210044, China; 3.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; 4.State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China |
| 推荐引用方式 GB/T 7714 | Wang, LL ,Wang, H ,Liu, JK ,et al. Impacts of the near-surface urban boundary layer structure on PM2.5 concentrations in Beijing during winter[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,669:493-504. |
| APA | Wang, LL .,Wang, H .,Liu, JK .,Gao, ZQ .,Yang, YJ .,...&Huang, M .(2019).Impacts of the near-surface urban boundary layer structure on PM2.5 concentrations in Beijing during winter.SCIENCE OF THE TOTAL ENVIRONMENT,669,493-504. |
| MLA | Wang, LL ,et al."Impacts of the near-surface urban boundary layer structure on PM2.5 concentrations in Beijing during winter".SCIENCE OF THE TOTAL ENVIRONMENT 669(2019):493-504. |
入库方式： OAI收割
来源：地球环境研究所
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。