Transport paths and vertical exchange characteristics of haze pollution in Southern China

Li, T. Y.1; Deng, X. J.2; Li, Y.3; Song, Y. S.3; Li, L. Y.4; Tan, H. B.1; Wang, C. L.5

2018-06

10.1016/j.scitotenv.2017.12.235

SCIENCE OF THE TOTAL ENVIRONMENT   影响因子和分区

0048-9697

1879-1026

Transport paths and vertical exchange characteristics are important factors fur understanding the long-term transport, dispersion capability for haze prediction. Many previous studies revealed that the Pearl River Delta (PRD) region, one of the major polluted areas in China, is largely affected by the long-range pollution transport. However, mostly of these studies focused on the source apportionment or horizontal transport path of pollutants by using short-term data, and the vertical exchange characteristics had been rarely analyzed. In this study, using HYSPLIT model, the transport paths and the vertical exchange characteristics of haze episodes over four sub legion of Guangdong (GD) Province in southern China of dry season and wet season were analyzed by using 10 years data from 2005 to 2014. Three major transport paths can be statistically summarized based on the long-term data. The haze episodes in PRD and North-GD were distinguished by the characteristics of high frequency and long duration, while the West-GD and East-GD are relatively clean. The haze over North-GD and PRD were mainly influenced by the airflows from northern path, which could bring the pollution from Jiangxi, Anhui, and also influenced by the airflows from coastal path, which could bring the pollution of eastern coastal from Zhejiang and Fujian to Guangdong, while regional transport contributions from Guangdong province and adjacent areas can also be clearly observed. The haze pollution from the identified two major transport paths were mainly transported within the mixing layer (>80% trajectories, <500 m), whereas the probability of haze trajectories across mixing layer was relatively low and generally associated with much longer transport distance and higher terrain height over Western China. Combing the vertical exchange analysis, results also show that Wuyi Mountains and Nanling Mountains played a role as barrier to obstruct the haze airflows from other regions of China to the Guangdong province. (C) 2017 Elsevier B.V. All rights reserved.

Air pollutant transport path Backward trajectory Vertical exchange characteristics Southern China

SCI ; EI

英语

通讯

Science and Technology Research Project of Guangdong Province Meteorological Department[2015Q12]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000426356600108

ELSEVIER SCIENCE BV

20180204620968

Landforms ; Mixing ; River pollution ; Trajectories

Atmospheric Properties:443.1 ; Water Pollution:453 ; Geology:481.1 ; Chemical Operations:802.3

ENVIRONMENT/ECOLOGY

Web of Science

1.Guangdong Ecol Meteorol Ctr, Guangzhou, Guangdong, Peoples R China
2.China Meteorol Adm, Guangdong Prov Key Lab Reg Numer Weather Predict, Inst Trop & Marine Meteorol, Guangzhou, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Ocean Dept Sci & Engn, Shenzhen, Peoples R China
4.Panyu Meteorol Serv, Guangzhou, Guangdong, Peoples R China
5.Guangzhou Climate & Agrometeorol Ctr, Guangzhou, Guangdong, Peoples R China

Li, T. Y.,Deng, X. J.,Li, Y.,et al. Transport paths and vertical exchange characteristics of haze pollution in Southern China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,625:1074-1087.

Li, T. Y..,Deng, X. J..,Li, Y..,Song, Y. S..,Li, L. Y..,...&Wang, C. L..(2018).Transport paths and vertical exchange characteristics of haze pollution in Southern China.SCIENCE OF THE TOTAL ENVIRONMENT,625,1074-1087.

Li, T. Y.,et al."Transport paths and vertical exchange characteristics of haze pollution in Southern China".SCIENCE OF THE TOTAL ENVIRONMENT 625(2018):1074-1087.