广州地区秋季PM2.5和臭氧复合污染的观测研究

Guowen He; Tao Deng; Shanshan Ouyang; Liping Tao; Zhenning Li; Cheng Wu; Xue Zhang; Dui Wu

doi:10.13671/j.hjkxxb.2021.0462

广州地区秋季PM_2.5和臭氧复合污染的观测研究

Translated title of the contribution: Observation studies on the PM_2.5 and O₃ complex episodes during autumn in Guangzhou

Guowen He, Tao Deng^*, Shanshan Ouyang, Liping Tao, Zhenning Li, Cheng Wu, Xue Zhang, Dui Wu^*

^*Corresponding author for this work

Division of Environment and Sustainability

Research output: Contribution to journal › Journal Article › peer-review

6 Citations (Scopus)

Abstract

By using observational data including surface meteorological elements, air quality parameters and the vertical aerosol lidar observation data from Guangzhou Haizhu Lake Atmospheric Composition Station during September to October 2019, the article studied the diurnal cycle of meteorological elements, atmospheric pollutants and the distribution of boundary layer aerosol corresponding to different types of PM_2.5-O₃ episodes. The causes of high PM_2.5-high O₃ were further analyzed. A total of 25 days of low PM_2.5-low O₃ days (Clean Days), 12 days of low PM_2.5-high O₃ days (Episodic Days Ⅰ) and 20 days of high PM_2.5-high O₃ days (Episodic Days Ⅱ) were identified during the observation period. The analysis of meteorological elements and atmospheric pollutants showed that on Episodic Days Ⅱ the average temperature (T) and relative humidity (RH) were over 30 ℃ and lower than 60% from 11:00 to 16:00, and the average daily wind speed (WS) and the maximum J(NO₂) were 0.88 m·s^-1 and 0.007 s^-1, respectively. Compared with Clean Days, Episodic Days Ⅱ is represented by high T and low RH. Meanwhile, slightly lower actinic radiation and lower WS can be found in Episodic Days Ⅱ than Episodic Days I. The daily mean PM_2.5 and O₃ concentration were 2.3 and 1.5 times of those on clean days, corresponding with the high concentration of SO₂ and NO₂, high atmospheric oxidation capacity and fine particles ratio on Episodic Days Ⅱ. The lidar results showed that the aerosol extinction coefficient of Clean Days and Episodic Days Ⅰ were lower, and mainly in the range of 0.1~0.2 km^-1. In Episodic Days Ⅱ, the aerosol extinction coefficients were in the range of 0.2~0.3 km^-1 and the maximum value was below 500m. In the afternoon, the aerosol depolarization ratio in Episodic Days II was larger than that of Clean Says and Episodic Days Ⅰ, indicating obvious feature of secondary aerosol generation. The analysis of typical pollution episodes on Episodic Days Ⅱ shows that the boundary layer evolution could directly affect the distribution of surface pollutants. In the context of Western Pacific Subtropical High and typhoon periphery, the downward transport of pollutants inside the residual layer had a significant influence on the accumulation of surface pollutant concentration in the morning.

Translated title of the contribution	Observation studies on the PM_2.5 and O₃ complex episodes during autumn in Guangzhou
Original language	Chinese (Traditional)
Pages (from-to)	250-259
Number of pages	10
Journal	Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae
Volume	42
Issue number	6
DOIs	https://doi.org/10.13671/j.hjkxxb.2021.0462
Publication status	Published - 26 Jun 2022

Bibliographical note

Publisher Copyright:
© 2022, Science Press. All right reserved.

Keywords

Aerosol depolarization ratio
Complex pollution
Guangzhou
Lidar
Ozone
PM

Access to Document

10.13671/j.hjkxxb.2021.0462

Cite this

@article{6a44cfca47c04dd28f25f8ce2a6e96c0,

title = "广州地区秋季PM2.5和臭氧复合污染的观测研究",

abstract = "By using observational data including surface meteorological elements, air quality parameters and the vertical aerosol lidar observation data from Guangzhou Haizhu Lake Atmospheric Composition Station during September to October 2019, the article studied the diurnal cycle of meteorological elements, atmospheric pollutants and the distribution of boundary layer aerosol corresponding to different types of PM2.5-O3 episodes. The causes of high PM2.5-high O3 were further analyzed. A total of 25 days of low PM2.5-low O3 days (Clean Days), 12 days of low PM2.5-high O3 days (Episodic Days Ⅰ) and 20 days of high PM2.5-high O3 days (Episodic Days Ⅱ) were identified during the observation period. The analysis of meteorological elements and atmospheric pollutants showed that on Episodic Days Ⅱ the average temperature (T) and relative humidity (RH) were over 30 ℃ and lower than 60\% from 11:00 to 16:00, and the average daily wind speed (WS) and the maximum J(NO2) were 0.88 m·s-1 and 0.007 s-1, respectively. Compared with Clean Days, Episodic Days Ⅱ is represented by high T and low RH. Meanwhile, slightly lower actinic radiation and lower WS can be found in Episodic Days Ⅱ than Episodic Days I. The daily mean PM2.5 and O3 concentration were 2.3 and 1.5 times of those on clean days, corresponding with the high concentration of SO2 and NO2, high atmospheric oxidation capacity and fine particles ratio on Episodic Days Ⅱ. The lidar results showed that the aerosol extinction coefficient of Clean Days and Episodic Days Ⅰ were lower, and mainly in the range of 0.1\textasciitilde{}0.2 km-1. In Episodic Days Ⅱ, the aerosol extinction coefficients were in the range of 0.2\textasciitilde{}0.3 km-1 and the maximum value was below 500m. In the afternoon, the aerosol depolarization ratio in Episodic Days II was larger than that of Clean Says and Episodic Days Ⅰ, indicating obvious feature of secondary aerosol generation. The analysis of typical pollution episodes on Episodic Days Ⅱ shows that the boundary layer evolution could directly affect the distribution of surface pollutants. In the context of Western Pacific Subtropical High and typhoon periphery, the downward transport of pollutants inside the residual layer had a significant influence on the accumulation of surface pollutant concentration in the morning.",

keywords = "Aerosol depolarization ratio, Complex pollution, Guangzhou, Lidar, Ozone, PM",

author = "Guowen He and Tao Deng and Shanshan Ouyang and Liping Tao and Zhenning Li and Cheng Wu and Xue Zhang and Dui Wu",

year = "2022",

month = jun,

day = "26",

doi = "10.13671/j.hjkxxb.2021.0462",

language = "Chinese (Traditional)",

volume = "42",

pages = "250--259",

journal = "Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae",

issn = "0253-2468",

publisher = "Science Press ",

number = "6",

}

TY - JOUR

T1 - 广州地区秋季PM2.5和臭氧复合污染的观测研究

AU - He, Guowen

AU - Deng, Tao

AU - Ouyang, Shanshan

AU - Tao, Liping

AU - Li, Zhenning

AU - Wu, Cheng

AU - Zhang, Xue

AU - Wu, Dui

PY - 2022/6/26

Y1 - 2022/6/26

N2 - By using observational data including surface meteorological elements, air quality parameters and the vertical aerosol lidar observation data from Guangzhou Haizhu Lake Atmospheric Composition Station during September to October 2019, the article studied the diurnal cycle of meteorological elements, atmospheric pollutants and the distribution of boundary layer aerosol corresponding to different types of PM2.5-O3 episodes. The causes of high PM2.5-high O3 were further analyzed. A total of 25 days of low PM2.5-low O3 days (Clean Days), 12 days of low PM2.5-high O3 days (Episodic Days Ⅰ) and 20 days of high PM2.5-high O3 days (Episodic Days Ⅱ) were identified during the observation period. The analysis of meteorological elements and atmospheric pollutants showed that on Episodic Days Ⅱ the average temperature (T) and relative humidity (RH) were over 30 ℃ and lower than 60% from 11:00 to 16:00, and the average daily wind speed (WS) and the maximum J(NO2) were 0.88 m·s-1 and 0.007 s-1, respectively. Compared with Clean Days, Episodic Days Ⅱ is represented by high T and low RH. Meanwhile, slightly lower actinic radiation and lower WS can be found in Episodic Days Ⅱ than Episodic Days I. The daily mean PM2.5 and O3 concentration were 2.3 and 1.5 times of those on clean days, corresponding with the high concentration of SO2 and NO2, high atmospheric oxidation capacity and fine particles ratio on Episodic Days Ⅱ. The lidar results showed that the aerosol extinction coefficient of Clean Days and Episodic Days Ⅰ were lower, and mainly in the range of 0.1~0.2 km-1. In Episodic Days Ⅱ, the aerosol extinction coefficients were in the range of 0.2~0.3 km-1 and the maximum value was below 500m. In the afternoon, the aerosol depolarization ratio in Episodic Days II was larger than that of Clean Says and Episodic Days Ⅰ, indicating obvious feature of secondary aerosol generation. The analysis of typical pollution episodes on Episodic Days Ⅱ shows that the boundary layer evolution could directly affect the distribution of surface pollutants. In the context of Western Pacific Subtropical High and typhoon periphery, the downward transport of pollutants inside the residual layer had a significant influence on the accumulation of surface pollutant concentration in the morning.

AB - By using observational data including surface meteorological elements, air quality parameters and the vertical aerosol lidar observation data from Guangzhou Haizhu Lake Atmospheric Composition Station during September to October 2019, the article studied the diurnal cycle of meteorological elements, atmospheric pollutants and the distribution of boundary layer aerosol corresponding to different types of PM2.5-O3 episodes. The causes of high PM2.5-high O3 were further analyzed. A total of 25 days of low PM2.5-low O3 days (Clean Days), 12 days of low PM2.5-high O3 days (Episodic Days Ⅰ) and 20 days of high PM2.5-high O3 days (Episodic Days Ⅱ) were identified during the observation period. The analysis of meteorological elements and atmospheric pollutants showed that on Episodic Days Ⅱ the average temperature (T) and relative humidity (RH) were over 30 ℃ and lower than 60% from 11:00 to 16:00, and the average daily wind speed (WS) and the maximum J(NO2) were 0.88 m·s-1 and 0.007 s-1, respectively. Compared with Clean Days, Episodic Days Ⅱ is represented by high T and low RH. Meanwhile, slightly lower actinic radiation and lower WS can be found in Episodic Days Ⅱ than Episodic Days I. The daily mean PM2.5 and O3 concentration were 2.3 and 1.5 times of those on clean days, corresponding with the high concentration of SO2 and NO2, high atmospheric oxidation capacity and fine particles ratio on Episodic Days Ⅱ. The lidar results showed that the aerosol extinction coefficient of Clean Days and Episodic Days Ⅰ were lower, and mainly in the range of 0.1~0.2 km-1. In Episodic Days Ⅱ, the aerosol extinction coefficients were in the range of 0.2~0.3 km-1 and the maximum value was below 500m. In the afternoon, the aerosol depolarization ratio in Episodic Days II was larger than that of Clean Says and Episodic Days Ⅰ, indicating obvious feature of secondary aerosol generation. The analysis of typical pollution episodes on Episodic Days Ⅱ shows that the boundary layer evolution could directly affect the distribution of surface pollutants. In the context of Western Pacific Subtropical High and typhoon periphery, the downward transport of pollutants inside the residual layer had a significant influence on the accumulation of surface pollutant concentration in the morning.

KW - Aerosol depolarization ratio

KW - Complex pollution

KW - Guangzhou

KW - Lidar

KW - Ozone

KW - PM

UR - https://www.scopus.com/pages/publications/85132958196

U2 - 10.13671/j.hjkxxb.2021.0462

DO - 10.13671/j.hjkxxb.2021.0462

M3 - Journal Article

AN - SCOPUS:85132958196

SN - 0253-2468

VL - 42

SP - 250

EP - 259

JO - Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae

JF - Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae

IS - 6

ER -