Characterization and Atmospheric Drivers of Nocturnal Ozone Enhancement in Putian City, China DOI Creative Commons
Chunsheng Fang, Xiaowei Zhou,

Yuxuan Cai

и другие.

Atmosphere, Год журнала: 2025, Номер 16(1), С. 45 - 45

Опубликована: Янв. 3, 2025

The increasingly severe nocturnal ozone enhancement (NOE) event pollution is widely concerning. Therefore, based on the observed hourly O3 concentrations from 2015 to 2023, this study analyzes characteristics of NOE events over Putian City. analysis results show that frequency City high, at about 127 days annually, with a high in April and low July August. Most corresponded peak concentration (NOP) <120 μg/m3. Moreover, they mainly occurred between 1:00–3:00 7:00. physicochemical processes April, October, November 2020 were simulated using Weather Research Forecasting (WRF, version 4.3.3) model coupled Community Multiscale Air Quality (CMAQ, 5.4) model. suggest transport, especially horizontal transport eastern sea Zhejiang Province vertical upper atmosphere, could be major cause Furthermore, movement zone, along aggregation due weakened dry deposition influence stable boundary layer obstructed by mountain terrain, significantly influenced overall concentration. Thus, stem interaction among these processes. emphasize importance control implementation strict joint regional measures for improve air quality.

Язык: Английский

Analytical Methods for Atmospheric Carbonyl Compounds: A Review DOI Creative Commons

Xiaoshuai Gao,

Xin Zhang, Yan Nie

и другие.

Atmosphere, Год журнала: 2025, Номер 16(1), С. 107 - 107

Опубликована: Янв. 19, 2025

Atmospheric carbonyl compounds have significant impacts on the atmospheric environment and human health, making selection of appropriate analytical techniques crucial for accurately detecting these in specific environments. Based extensive literature research, this study summarized development history, relevant features, applicable scenarios main compounds; pointed out problems challenges field; discussed needs prospects future research application. It was found that direct sampling methods were to low-molecular-weight species with low reactivity, boiling points, high polarity, volatility, while indirect suitable a wider range various types phases species. For formaldehyde, offline detection primarily influenced by chemical reagents reaction conditions, whereas online monitoring relied sufficiently stable operating multiple compounds, results greatly detectors coupled chromatography, all volatile organic (VOCs), including some providing higher temporal resolution improved isomer identification mass spectrometry. The combined use proton transfer reaction-mass spectrometry (PTR-MS) liquid chromatography-mass (GC-MS) photochemical smog chamber simulation studies. Currently, require time advanced experimental skills optimization experiments detect broader Online face such as poor stability limited coverage. In studies, is heavily both system itself. Future efforts should focus improving environmental adaptability automation compound techniques, synergistic developing new systems, reducing impact itself detection, order enhance sensitivity, selectivity, resolution, accuracy, operability.

Язык: Английский

Процитировано

1

The Impacts of NO2 on Urban Air Quality and Cause for the Investigation of Its High Ambient Levels: Insights from a Relatively Long-Term Data Analysis in a Typical Petrochemical City in the Bohai Bay Region, China DOI Creative Commons

Xiaoshuai Gao,

Cong An,

Yongxin Yan

и другие.

Toxics, Год журнала: 2025, Номер 13(3), С. 208 - 208

Опубликована: Март 13, 2025

The ambient levels of NO2 in urban areas China recent years have generally shown a downward trend, but high concentrations still exist under certain conditions, and the causes for such phenomenon its impact on air quality remain unclear. Taking Dongying, typical petrochemical city Bohai Bay China, as an example, this paper analyzed influence investigated formation with concentrations. results indicated that higher daily (>40 μg/m3) mainly occurred during January-April September-December each year, hourly nighttime morning rush hour Dongying from 2017 to 2023. With increase concentrations, pollution showed general increasing trend occurrence values was affected by combination unfavorable meteorological local emissions regional transports, localized atmospheric chemical generation. High-pressure uniform-pressure weather patterns 2017–2022, along land–sea breeze circulation 2022, contribute Dongying. Boundary layer heights (BLH) spring (−0.43) winter (−0.36), wind direction summer (0.21), temperature autumn (−0.46) are primary factors driving NO2-HH (High values), while BLH (−0.47) is main cause NO2-HD values). titration reaction between NO O3 spring, autumn, photochemical reactions aromatics significant NO2-HD. NOx thermal power industry transports western southwestern Shandong Province (throughout year) Sea (during summer) had serious adverse 2022. study could help provide scientific basis control continuous improvement similar cities.

Язык: Английский

Процитировано

1

A Comparative Investigation on the Characteristics of Nocturnal Ozone Enhancement Events and Their Effects on Ground-level Ozone and PM2.5 in the Central City of the Yellow River Delta, China, in 2022 and 2023 DOI Open Access

Cong An,

Yongxin Yan,

Xiaoshuai Gao

и другие.

Опубликована: Фев. 6, 2024

In recent years, nocturnal ozone enhancement(NOE) events have become a hot research topic in the field of atmospheric environment. By using statistically-based data analysis, we made comparative investigation about concentrations and NOE 2022 2023, further explored effects on O3 PM2.5 at night same day next day. The results showed that from to 2023 Dongying, annual average increased 51 μg/m3 59 μg/m3, frequency was higher spring, summer autumn, lower winter. not only had an obvious promoting effect Ox, daily maximum 8 h concentration (MDA8-O3) (more apparent autumn), PM2.5-bounded NO3- SO42- winter), but also distinct influence O3, Ox MDA8-O3 summer). could strengthen understanding phenomena events, provide scientific basis for collaborative control urban areas Yellow River Delta, China.

Язык: Английский

Процитировано

4

Characterization and Atmospheric Drivers of Nocturnal Ozone Enhancement in Putian City, China DOI Creative Commons
Chunsheng Fang, Xiaowei Zhou,

Yuxuan Cai

и другие.

Atmosphere, Год журнала: 2025, Номер 16(1), С. 45 - 45

Опубликована: Янв. 3, 2025

The increasingly severe nocturnal ozone enhancement (NOE) event pollution is widely concerning. Therefore, based on the observed hourly O3 concentrations from 2015 to 2023, this study analyzes characteristics of NOE events over Putian City. analysis results show that frequency City high, at about 127 days annually, with a high in April and low July August. Most corresponded peak concentration (NOP) <120 μg/m3. Moreover, they mainly occurred between 1:00–3:00 7:00. physicochemical processes April, October, November 2020 were simulated using Weather Research Forecasting (WRF, version 4.3.3) model coupled Community Multiscale Air Quality (CMAQ, 5.4) model. suggest transport, especially horizontal transport eastern sea Zhejiang Province vertical upper atmosphere, could be major cause Furthermore, movement zone, along aggregation due weakened dry deposition influence stable boundary layer obstructed by mountain terrain, significantly influenced overall concentration. Thus, stem interaction among these processes. emphasize importance control implementation strict joint regional measures for improve air quality.

Язык: Английский

Процитировано

0