Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8863485 | Atmospheric Environment | 2018 | 7 Pages |
Abstract
An elevated pollution layer (EPL) at altitude â¼1700â¯m was observed over the North China Plain (NCP) in November 2016. The vertical profiles of aerosol loadings, chemical compositions and meteorological parameters were in-situ measured at both ground and aircraft platforms. The EPLs were observed simultaneously over Beijing and Baoding city (â¼150â¯km distance between) with similar aerosol concentration and size distribution, indicating the impact of the EPL at regional scale. The synoptic and remote sensing analysis suggest the pollutants in the EPL may result from regional transport from the polluted southwest, and then elevated by the influence of anticyclone circulation and surrounding terrain. The descent air mass next day may lead to EPL entrainment and contribute to increased aerosol concentration at lower level. The non-refractory compositions measured by aerosol mass spectrometer showed more significant fraction of nitrate and secondary organics in the EPL compared to the other layers. The pollutants in the EPL was then mixed into the developed planetary boundary layer (PBL), leading to uniform distribution of aerosol composition. Such atmospheric stratification at high level and its subsequent impact on the lower level needs to be considered for the future radiative forcing study over this region.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Atmospheric Science
Authors
Quan Liu, Deping Ding, Mengyu Huang, Ping Tian, Delong Zhao, Fei Wang, Xia Li, Kai Bi, Jiujiang Sheng, Wei Zhou, Dantong Liu, Rujin Huang, Chunsheng Zhao,