globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2019.117139
论文题名:
Improved method of visibility parameterization focusing on high humidity and aerosol concentrations during fog–haze events: Application in the GRAPES_CAUCE model in Jing-Jin-Ji, China
作者: Peng Y.; Wang H.; Hou M.; Jiang T.; Zhang M.; Zhao T.; Che H.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 222
语种: 英语
英文关键词: Aerosols ; Atmospheric chemistry ; Atmospheric humidity ; Drops ; Focusing ; Fog ; Parameterization ; Aerosol extinction coefficient ; Atmospheric chemistry model ; Atmospheric visibility ; Extinction coefficients ; High relative humidities ; Low visibility conditions ; Parameterization schemes ; Simulation ; Visibility ; aerosol ; atmospheric chemistry ; atmospheric modeling ; concentration (composition) ; extinction coefficient ; fog ; haze ; humidity ; methodology ; parameterization ; simulation ; visibility ; aerosol ; article ; case report ; China ; clinical article ; grape ; haze ; human ; humidity ; nonhuman ; simulation ; visibility ; Beijing [China] ; China ; Hebei ; Jingjinji ; Tianjin
学科: Extinction coefficient ; Fog-haze weather ; Parameterization scheme ; Simulation ; Visibility
中文摘要: Atmospheric visibility affects people's everyday lives and its simulation accuracy is therefore important, especially in low visibility conditions. Two fog–haze pollution episodes (episode 1, 16–21 December 2016 and episode 2, 30 December 2016–7 January 2017) in the Beijing–Tianjin–Hebei (Jing-Jin-Ji) region of China are simulated using the GRAPES_CUACE atmospheric chemistry model. The simulation of low visibility is significantly overestimated by the model. The observational data show that a decrease in visibility is closely related to the increase of the mass concentration of aerosol particles and the increase of the relative humidity. However, the contribution of aerosol particles to extremely low visibility is less than that of the relative humidity. When visibility is < 5 or even 2 km, the relative humidity is often >80% or near saturation. High humidity promotes the hygroscopic growth of aerosols, and it also favors the formation of fog droplets. Besides the strongly enhanced aerosol extinction coefficient due to hygroscopic growth at high relative humidity conditions that may be underestimated by the IMPROVE scheme, the further degradation of visibility may also depend on extinction from fog droplets which is absent in the IMPROVE scheme. An improved visibility parameterization focusing on low visibility is proposed based on the IMPROVE equation by including the direct extinction coefficient bf of fog droplets in the original parameterization. Focusing on the two fog–haze episodes, the simulation results with the improved parameterization show an overall improvement in the simulation of low visibility over the whole Jing-Jin-Ji region. The errors in the simulation of visibility by the improved parameterization averaged over the Jing-Jin-Ji region are reduced by 65%–88% relative to the original parameterization. In addition, the improved parameterization greatly improves the visibility simulation accuracies (VSAs) of 5 km, especially 3 km. © 2019 Elsevier Ltd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160597
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; State Power Investment Corporation Guangxi, Electric Power Company Limited Guilin Branch, Guilin, 541100, China; Institute for Disaster Risk Management, School of Geographical Science, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Beijing Meteorological Service, Beijing, 100089, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, 210044, China

Recommended Citation:
Peng Y.,Wang H.,Hou M.,et al. Improved method of visibility parameterization focusing on high humidity and aerosol concentrations during fog–haze events: Application in the GRAPES_CAUCE model in Jing-Jin-Ji, China[J]. Atmospheric Environment,2020-01-01,222
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Peng Y.]'s Articles
[Wang H.]'s Articles
[Hou M.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Peng Y.]'s Articles
[Wang H.]'s Articles
[Hou M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Peng Y.]‘s Articles
[Wang H.]‘s Articles
[Hou M.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.