The impact of potential recirculation on the air quality of Bohai Bay in China

Wang, Taihao; Du, Haibo; Zhao, Zezheng; Russo, Ana; Zhang, Jiping; Zhou, Chengjun

doi:10.1016/j.apr.2021.101268

Cited by 11 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Differences between land and sea temperatures can influence local wind patterns in coastal areas, creating situations where pollutants emitted overnight or in the morning and blown out to sea are recirculated back over (or near) the source area with a developing sea breeze (Yimin and Lyons, 2003;Levy et al, 2008). Such effects were not accounted for in our study but have been the focus of other research that has used recirculation metrics (Di Bernardino et al, 2022;Wang et al, 2022).…”

Section: Discussionmentioning

confidence: 98%

Statistical modelling of air quality impacts from individual forest fires in New South Wales, Australia

Storey

Price

2022

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Wildfires and hazard reduction burns produce smoke that contains pollutants including particulate matter. Particulate matter less than 2.5 µm in diameter (PM2.5) is harmful to human health, potentially causing cardiovascular and respiratory issues that can lead to premature deaths. PM2.5 levels depend on environmental conditions, fire behaviour and smoke dispersal patterns. Fire management agencies need to understand and predict PM2.5 levels associated with a particular fire so that pollution warnings can be sent to communities and/or hazard reduction burns can be timed to avoid the worst conditions for PM2.5 pollution. We modelled PM2.5, measured at air quality stations in New South Wales (Australia) from ∼ 1400 d when individual fires were burning near air quality stations, as a function of fire and weather variables. Using Visible Infrared Imaging Radiometer Suite (VIIRS) satellite hotspots, we identified days when one fire was burning within 150 km of at least 1 of 48 air quality stations. We extracted ERA5 gridded weather data and daily active fire area estimates from the hotspots for our modelling. We created random forest models for afternoon, night and morning PM2.5 levels to understand drivers of and predict PM2.5. Fire area and boundary layer height were important predictors across the models, with temperature, wind speed and relative humidity also being important. There was a strong increase in PM2.5 with decreasing distance, with a sharp increase when the fire was within 20 km. The models improve our understanding of the drivers of PM2.5 from individual fires and demonstrate a promising approach to PM2.5 model development. However, although the models predicted well overall, there were several large under-predictions of PM2.5 that mean further model development would be required for the models to be deployed operationally.

show abstract

Section: Discussionmentioning

confidence: 98%

Statistical modelling of air quality impacts from individual forest fires in New South Wales, Australia

Storey

Price

2022

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Mastering the diffusion and transport laws of pollutants is very important to quantify air pollution levels, meteorological conditions play an important role in the diffusion and transport of pollutants (Li et al, 2012;Mao et al, 2020;Miao et al, 2017;Wang et al, 2016;Zong et al, 2021;Zhao et al, 2019Zhao et al, , 2021aZhao et al, , 2021bSun et al, 2018Sun et al, , 2019. The meteorological conditions mainly include large-scale synoptic circulation and the mesoscale meteorological conditions (Zhou et al, 2018(Zhou et al, , 2019Wang et al, 2022;Russo et al, 2014, Russo et al, 2016. Large-scale synoptic circulation determines the specific climatic background of the study area and provides the basic dynamic field for the diffusion and transport of particulate matter (Zhao et al, 2019;Bei et al, 2022;Yan et al, 2022;Gong et al, 2022a, Gong et al, 2022b.…”

Section: Introductionmentioning

confidence: 99%

Collective influences of boundary layer process and synoptic circulation on particulate pollution: A new study in changsha-zhuzhou-xiangtan urban agglomeration of central china

Wang

Du²,

Zhao³

et al. 2022

Front. Environ. Sci.

View full text Add to dashboard Cite

Particulate matter pollution is increasingly serious in Changsha-Zhuzhou-Xiangtan urban agglomeration (CZT) due to rapid industrialization and urbanization. Particulate matter pollution and weather conditions are closely related. In this study, the relationship between the large-scale weather circulation types (CTs), horizontal recirculation wind field, boundary layer structure and particulate matter pollution (PM2.5) in CZT was systematically investigated. Firstly, the Allwine and Whiteman (AW) wind field classification method and Richardson method were used to calculate the horizontal recirculation index and the planetary boundary layer height (PBLH) in CZT. By analyzing the relationship among the recirculation index, the PBLH and the particle concentration, it was found that the recirculation process in CZT could be divided into horizontal recirculation and “pseudo recirculation”. Then, the circulation patterns affecting the CZT were divided into nine types (CT1-CT9) by using T-mode PCA method based on 925 hpa geopotential data. The CZT was prone to recirculation under the control of high pressure rear (CT4), weak high pressure edge (CT5) and southwest vortex (CT7, CT8). It was found that CT4 and CT5 accompanied with lower PBLH and poorer vertical diffusion conditions characterized by high particle concentration. While CT7 and CT8 accompanied with higher PBLH and better vertical diffusion conditions characterized by low particle concentration. Finally, the effect of CTs, recirculation index and boundary layer structure on paticle matter concentration were assessed during two recirculation processes in December 2016 and August 2017, repectively. The analysis was complemented with FLEXPART-WRF model simulations, which confirmed that the recirculation and “pseudo recirculation” can be effectively distinguished by introducing the PBLH, combined with the large-scale weather circulation.

show abstract

“…Large-scale synoptic circulation determines the specific climate background of a region and provides the basic dynamic field for regional dispersion and transport of particulate matter (Zhao et al, 2019;Zhao et al, 2021a;Zhao et al, 2021b;Wang et al, 2022a;Wang et al, 2022b;Wang et al, 2022c). Several studies reveal the significance of weather circulation on air quality (Zhang J.P et al, 2012;Russo et al, 2014;Zhou et al, 2018;Zhou et al, 2019;Zhou et al, 2019;Zong et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Miao et al, 2020 studied the relationship between severe haze events in the Beijing-Tianjin-Hebei region and the planetary boundary layer and weather circulation and found that under the influence of the southeast high, northern low, and eastern high-pressure systems, warm air often suppresses the development of the boundary layer hight, resulting in the deterioration of air quality in the Beijing-Tianjin-Hebei region. Several studies have shown that local meteorological conditions have a strong dependence on weather circulation, which will affect the specific distribution of pollutants (Levy et al, 2008a;Levy et al, 2008b;Levy et al, 2010;Russo et al, 2016;Ye et al, 2016;Russo et al, 2018;Liu et al, 2019;Xu et al, 2019;Xu et al, 2020;Li X et al, 2021;Sun et al, 2021;Wang et al, 2022a;Wang et al, 2022d). Sun et al, 2021 studied the formation and dissipation mechanism of pollution events and found that the wind speed and temperature in the formation stage of the pollution events were much lower than that in the dissipation stage.…”

Section: Introductionmentioning

confidence: 99%

Influence of meteorological conditions on the air quality during the 2022 Winter Olympics in Beijing

Wang

Cheng

et al. 2022

Front. Environ. Sci.

Self Cite

View full text Add to dashboard Cite

The 24th Winter Olympics was held in Beijing, and the air quality in the Beijing area has become the focus of the world’s attention. The Beijing government has taken a series of strict measures to control pollutant emissions during the Winter Olympics, which also provides us with a valuable opportunity to study the impact of meteorological conditions on pollutants. We defined November, December, January, February, and March as the polluted period in Beijing, and used the T-PCA method to divide the circulation types (CTs) affecting Beijing into six kinds (CT1-CT6). It was found that under the control of the western high pressure (CT1) and the northwest high pressure (CT4), the concentrations of PM2.5, NO2, SO2 and CO in Beijing were lower; while under the control of the northern high pressure (CT2), eastern high pressure (CT5), southeast high (CT3) and northeast low pressure (CT6), the concentration of PM2.5, NO2, SO2 and CO is higher. By analyzing the daily CTs, wind field and pollutant concentration changes in the Beijing area during the Beijing Winter Olympics, it was found that when two pollution events occurred during the Winter Olympics, the Beijing area was mainly prevailed by CT2, CT3, and CT6. Comparing the frequency of occurrence of six CTs during the 2022 Winter Olympics and the same period from 2014 to 2021, it was found that the proportion of CT1 and CT4 increased significantly during the Winter Olympics. Finally, the FLEXPART-WRF model was used to analyze the 48-h backward footprint distribution of pollutant particles in Beijing during the Winter Olympics. It further showed that the circulation in the Beijing area during the Winter Olympics was generally conducive to the dispersion of pollutants, and the air quality was better.

show abstract

The impact of potential recirculation on the air quality of Bohai Bay in China

Cited by 11 publications

References 41 publications

Statistical modelling of air quality impacts from individual forest fires in New South Wales, Australia

Statistical modelling of air quality impacts from individual forest fires in New South Wales, Australia

Collective influences of boundary layer process and synoptic circulation on particulate pollution: A new study in changsha-zhuzhou-xiangtan urban agglomeration of central china

Influence of meteorological conditions on the air quality during the 2022 Winter Olympics in Beijing

Contact Info

Product

Resources

About