Synoptic weather patterns and their impacts on regional particle pollution in the city cluster of the Sichuan Basin, China

Zhan, Chenchao; Xie, Min; Fang, Dexian; Wang, Tijian; Wu, Zheng; Lu, Hua; Li, Mengmeng; Chen, Pulong; Zhuang, Bingliang; Li, Shu; Zhang, Zhiqi; Gao, Dawen; Ren, Junyu; Zhao, Ming

doi:10.1016/j.atmosenv.2019.03.033

Cited by 46 publications

(28 citation statements)

References 53 publications

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“…For Geography reason, unlike the PRD, YRD, and BTH regions, CPEZ is located in a plain of the Sichuan Basin. This kind of terrain makes it difficult for the central city group to form air flow with its peripheral cities [22,23,47]. It is reflected in Moran's I that the central city group has strong correlation, but the overall correlation of all cities is not strong.…”

Section: Discussionmentioning

confidence: 99%

“…Stable weather is easily formed by this geographic environment, which means it is not conducive to the diffusion and dilution of pollutants and aggravates air pollution. Specifically, because CPEZ is located in the basin topography, the atmospheric environment capacity is very limited and where prolonged breezes or calm winds in the area can inhibit advection transport of pollutants and hinder their diffusion, which would multiply the amount of pollutants near the ground [22] Besides, the phenomenon of temperature inversion in urban is serious, that is the upper air temperature is higher than the lower air temperature. Once the formation of this inversion, the air cannot convection up and down, which is difficult to diffuse pollutants [22,23].…”

Section: Study Area and Data Sourcesmentioning

confidence: 99%

See 1 more Smart Citation

Spatial Econometric Analysis of the Impact of Socioeconomic Factors on PM2.5 Concentration in China’s Inland Cities: A Case Study from Chengdu Plain Economic Zone

Yang

Lan

2019

IJERPH

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Particulate matter with a diameter less than 2.5 µm (PM2.5), one of the main sources of air pollution, has increasingly become a concern of the people and governments in China. Examining the socioeconomic factors influencing on PM2.5 concentration is important for regional prevention and control. Previous studies mainly concentrated on the economically developed eastern coastal cities, but few studies focused on inland cities. This study selected Chengdu Plain Economic Zone (CPEZ), an inland region with heavy smog, and used spatial econometrics methods to identify the spatiotemporal distribution characteristics of PM2.5 concentration and the socioeconomic factors underlying it from 2006 to 2016. Moran’s index indicates that PM2.5 concentration in CPEZ does have spatial aggregation characteristics. In general, the spatial clustering from the fluctuation state to the stable low state decreased by 1% annually on average, from 0.190 (p < 0.05) in 2006 to 0.083 (p < 0.1) in 2016. According to the results of the spatial Durbin model (SDM), socioeconomic factors including population density, energy consumption per unit of output, gross domestic product (GDP), and per capita GDP have a positive effect on PM2.5 concentration, while greening rate and per capita park space have a negative effect. Additionally, those factors have identified spatial spillover effects on PM2.5 concentration. This study could be a reference and support for the formulation of more efficient air pollution control policies in inland cities.

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Section: Discussionmentioning

confidence: 99%

Section: Study Area and Data Sourcesmentioning

confidence: 99%

Spatial Econometric Analysis of the Impact of Socioeconomic Factors on PM2.5 Concentration in China’s Inland Cities: A Case Study from Chengdu Plain Economic Zone

Yang

Lan

2019

IJERPH

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“…The data quality assurance and quality control procedures for the monitoring are strictly in accordance with the national standard HJ/T193‐2013. Furthermore, manual inspections are performed during data processing, including the identification and handling of invalid and missing data (Li et al., 2017; Zhan et al., 2019). The urban hourly O 3 concentrations in a city were calculated by averaging O 3 concentrations measured at all monitoring sites in that city.…”

Section: Methodsmentioning

confidence: 99%

“…Generally, high O 3 concentration is likely to occur on days with high temperature and low winds (Li et al., 2019; Zhang et al., 2015). Under a certain weather pattern, meteorological conditions usually resemble similarities to a large extent (Zhan et al., 2019). The main weather patterns associated with high O 3 episodes are continental anticyclones and tropical cyclones (Wang et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

Surface Ozone in the Yangtze River Delta, China: A Synthesis of Basic Features, Meteorological Driving Factors, and Health Impacts

et al. 2021

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Ozone (O 3) is of great importance to air quality in the Yangtze River Delta (YRD) region, China. Focusing on surface O 3 in the YRD, its spatiotemporal characteristics, meteorological driving factors, and health impacts are investigated based on surface O 3 observations in this study. We find that from 2015 to 2019, most cities failed to meet the national standards and O 3 pollution mainly occurred in warm seasons (April-September). Surface O 3 in the YRD increased in the recent years, so did tropospheric column O 3. Spatially, surface shows a significant positive autocorrelation over the YRD except for 2019, and high O 3 values mainly gather in the central of the YRD. The first two empirical orthogonal functions (EOFs) of O 3 accounted for 37.4% and 20.0% of the total variance in O 3 , respectively, with their spatial patterns characterized by the same phase and west and east contrast, respectively. The EOF1 is related to the change in radiation and the EOF2 is attributed to regional transport by prevailing westerly wind. Downward UV radiation, temperature and u wind are crucial factors. The premature mortality caused by O 3 for respiratory disease in the YRD is estimated to be 5,889 cases per year. Furthermore, we find that premature mortality is more sensitive to O 3 concentration than population, suggesting that controlling peak O 3 concentration can bring great health benefits. ZHAN ET AL.

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“…The MDA8 O3 is calculated based on the hourly O3 with more than 18-h measurements (Liao et al, 2017). Manual inspection, including the identification and handling of invalid and lacking data, is performed following previous studies Shu et al, 2017;Zhan et al, 2019).…”

Section: Air Quality Datamentioning

confidence: 99%

Ozone affected by a succession of four landfall typhoons in the Yangtze River Delta, China: major processes and health impacts

Zhan¹,

Xie²,

Huang³

et al. 2020

Preprint

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Abstract. Landfall typhoon can significantly affect O3 in the Yangtze River Delta (YRD) region. In this study, we investigate a unique case characterized by two multiday regional O3 pollution episodes related to four successive landfall typhoons in the summer of 2018 in the YRD. The results show that O3 pollution episodes mainly occurred during the period from the end of typhoon and the arrival of the next typhoon. The moment that typhoon reached the 24-h warning line and the last moment of typhoon activity in the mainland China can be roughly regarded as time nodes. Meanwhile, the variations of O3 was related to the track, duration and landing intensity of the typhoons. The impact of typhoon on O3 was like a wave superimposed on the background of high O3 concentration in the YRD in summer. When typhoon was near the 24-h warning line before it landed the coast line of the YRD, the prevailing wind originally from the ocean changed to from the inland, and transported lots of precursors from the polluted areas to the YRD. With typhoon, the low temperature, strong upward airflows, more precipitation and wild wind prevented high O3 episodes. After typhoon, the air below the 700 hPa atmospheric layer was warm and dry, which was conductive to the formation of O3 from the abundance of precursors. It is note-worthy that O3 is mainly generated in the middle of boundary layer (~ 1000 m), and then transported to the surface by downward airflows or turbulences. Moreover, O3 can be accumulated and trapped on the ground due to the poor diffusion conditions because the vertical diffusion and horizontal diffusion were suppressed by downward airflows and light wind, respectively. The premature mortalities attributed to O3 exposure in the YRD during the study period is 194.0, more than the casualties caused directly by the typhoons. This work enhances our understanding of how landfall typhoons affect O3 in the YRD, which can be helpful to forecast the O3 pollution synthetically impacted by the subtropical high and typhoon.

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Synoptic weather patterns and their impacts on regional particle pollution in the city cluster of the Sichuan Basin, China

Cited by 46 publications

References 53 publications

Spatial Econometric Analysis of the Impact of Socioeconomic Factors on PM2.5 Concentration in China’s Inland Cities: A Case Study from Chengdu Plain Economic Zone

Spatial Econometric Analysis of the Impact of Socioeconomic Factors on PM2.5 Concentration in China’s Inland Cities: A Case Study from Chengdu Plain Economic Zone

Surface Ozone in the Yangtze River Delta, China: A Synthesis of Basic Features, Meteorological Driving Factors, and Health Impacts

Ozone affected by a succession of four landfall typhoons in the Yangtze River Delta, China: major processes and health impacts

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