Arid
DOI10.3390/atmos9100382
Numerical Simulation Study of Winter Pollutant Transport Characteristics over Lanzhou City, Northwest China
He, Jianjun1,2; Lu, Shuhua1,2; Yu, Ye3; Gong, Sunling1,2; Zhao, Suping3; Zhou, Chunhong1,2
通讯作者He, Jianjun
来源期刊ATMOSPHERE
ISSN2073-4433
出版年2018
卷号9期号:10
英文摘要

Air pollution levels are severe in Lanzhou due to the valley topography and the semi-arid climate. A comprehensive understanding of pollutant transport characteristics, which are affected by atmospheric circulation, can help explain the reason for the air pollution to some extent. Using the Weather Research and Forecast (WRF) model coupled with the FLEXible PARTicle (FLEXPART) dispersion model, the authors of this paper simulated the transport pathways of pollutants discharged from local sources and analyzed the diffusion efficiency over Lanzhou during six winters from 2002 to 2007. Flow field analysis showed that a divergence and convergence region formed in the Lanzhou valley during the day and at night, respectively. The Lanzhou valley was dominated by an easterly wind. Based on transport trajectories from FLEXPART, five main transport pathways, namely, the southwest pathway (SW), west pathway (W), south pathway (S), southeast pathway (SE), and northeast pathway (NE), were identified over Lanzhou. Compared with static weather, it was easier for pollutants to cross the south mountain (i.e., along the southeast pathway) during the strong cold air process. The percentage of particles moving out of the urban valley after 12 h of transport and the ratio of particles moving back into the urban valley showed significant diurnal variability. This indicates that the air pollution over Lanzhou may be reduced to some extent by artificially controlling the emission time of pollutants.


英文关键词WRF FLEXPART transport trajectory local circulation
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000448543200017
WOS关键词METEOROLOGICAL CONDITIONS ; AIR-POLLUTANTS ; MODEL ; MESOSCALE ; EMISSIONS ; PM2.5
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207869
作者单位1.Chinese Acad Meteorol Sci, State Key Lab SevereWeather, Beijing 100081, Peoples R China;
2.Chinese Acad Meteorol Sci, Key Lab Atmospher Chem, CMA, Beijing 100081, Peoples R China;
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式
GB/T 7714
He, Jianjun,Lu, Shuhua,Yu, Ye,et al. Numerical Simulation Study of Winter Pollutant Transport Characteristics over Lanzhou City, Northwest China[J],2018,9(10).
APA He, Jianjun,Lu, Shuhua,Yu, Ye,Gong, Sunling,Zhao, Suping,&Zhou, Chunhong.(2018).Numerical Simulation Study of Winter Pollutant Transport Characteristics over Lanzhou City, Northwest China.ATMOSPHERE,9(10).
MLA He, Jianjun,et al."Numerical Simulation Study of Winter Pollutant Transport Characteristics over Lanzhou City, Northwest China".ATMOSPHERE 9.10(2018).
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