Environmental Pollution, Год журнала: 2025, Номер 368, С. 125704 - 125704
Опубликована: Янв. 16, 2025
Язык: Английский
Science Advances, Год журнала: 2022, Номер 8(2)
Опубликована: Янв. 14, 2022
Enhanced anthropogenic and biogenic interaction by approaching typhoons deteriorates cross-regional ozone pollution in China.
Язык: Английский
Процитировано
88
npj Climate and Atmospheric Science, Год журнала: 2022, Номер 5(1)
Опубликована: Март 28, 2022
Abstract With improving PM 2.5 air quality, the tropospheric ozone (O 3 ) has become top issue of China’s pollution control. Here, we combine comprehensive observational data analysis with models to unveil contributions different processes and precursors change O during COVID-19 lockdown in Yangtze River Delta (YRD), one most urbanized megacity regions eastern China. Despite a 44 47% reduction volatile organic compounds (VOCs) nitrogen oxides (NO x emissions, maximum daily 8-h average (MDA8) concentrations increase from 28 ppbv pre-lockdown 43 period. We reproduce this transition WRF-Chem model, which shows that ~80% MDA8 is due meteorological factors (seasonal variation radiation), ~20% emission reduction. find daytime photochemistry does not lead an but rather decrease production lockdown. However, reduced overwhelmed by weakened nitric oxide (NO) titration resulting net concentration. Although increases concentration, it leads + NO 2 suggesting atmospheric oxidation capacity on regional scale. The dominant effect demonstrates importance prioritizing VOCs reduction, especially solvent usage petrochemical industry high ratios VOCs/NO x.
Язык: Английский
Процитировано
76
The Science of The Total Environment, Год журнала: 2021, Номер 806, С. 150247 - 150247
Опубликована: Сен. 9, 2021
Язык: Английский
Процитировано
68
Journal of Environmental Sciences, Год журнала: 2022, Номер 123, С. 140 - 155
Опубликована: Март 7, 2022
Язык: Английский
Процитировано
47
Atmospheric Environment, Год журнала: 2023, Номер 308, С. 119864 - 119864
Опубликована: Май 23, 2023
Язык: Английский
Процитировано
24
The Science of The Total Environment, Год журнала: 2022, Номер 823, С. 153720 - 153720
Опубликована: Фев. 8, 2022
Язык: Английский
Процитировано
38
Journal of Geophysical Research Atmospheres, Год журнала: 2022, Номер 127(21)
Опубликована: Окт. 29, 2022
Abstract Tropospheric ozone (O 3 ) pollution is becoming the primary obstacle to improvement of air quality in China, especially Pearl River Delta (PRD) region. Because O episodes are closely related synoptic weather patterns (SWPs), historical (from 2006 2019) were classified according SWPs using Lamb‐Jenkinson method. Monitoring network and reanalysis data, emission inventories, satellite retrievals used investigate spatiotemporal characteristics influences pollution. It was found that easterly (P_E), anticyclone (P_A), typhoon‐related (P_NE) accounted for 75% all episodes. In PRD, formation mechanism showed clear differences under different SWPs, which affected by local emissions P_A, whereas regional transmission dominated P_E P_NE. The peak concentration strongly associated with temperature, solar radiation, shifting sea‐land breeze. A delayed shift land sea breeze caused often appear late afternoon. Finally, stepwise regression explain individual meteorological parameters contributing formation. P_NE increases temperature while P_A mainly increase overnight accumulation . This study advances our knowledge provides scientific support effective control.
Язык: Английский
Процитировано
32
The Science of The Total Environment, Год журнала: 2023, Номер 903, С. 166191 - 166191
Опубликована: Авг. 9, 2023
Язык: Английский
Процитировано
20
Atmospheric chemistry and physics, Год журнала: 2023, Номер 23(7), С. 4247 - 4269
Опубликована: Апрель 6, 2023
Abstract. China has been conducting a series of actions on air quality improvement for the past decades, and pollutant emissions have changing swiftly across country. Provinces are an important administrative unit management in China; thus reliable provincial-level emission inventory multiple years is essential detecting varying sources pollution evaluating effectiveness controls. In this study, we selected Jiangsu, one most developed provinces China, high-resolution nine species 2015–2019, with improved methodologies different sectors, best available facility-level information individual sources, real-world measurements. Resulting from implementation strict control measures, anthropogenic were estimated to declined 53 %, 20 7 2 10 21 16 6 18 % sulfur dioxide (SO2), nitrogen oxides (NOx), carbon monoxide (CO), non-methane volatile organic compounds (NMVOCs), ammonia (NH3), inhalable particulate matter (PM10), fine (PM2.5), black (BC), (OC) 2015 2019, respectively. Larger abatement SO2, NOx, PM2.5 was detected more region southern Jiangsu. During period 2016 ratio biogenic (BVOCs) (AVOCs) exceeded 50 month July, indicating importance summer O3 formation. Our estimates annual NMVOCs, NH3 generally smaller than national inventory, MEIC (the Multi-resolution Emission Inventory China), but larger primary particles. The discrepancies between studies resulted mainly methods estimation (e.g., procedure-based approach AVOC key industries used work) inconsistent source operation penetration removal efficiencies devices). Regarding periods, reduction SO2 found 2017 AVOCs, 2019. Among 13 major ultra-low-emission retrofit power sector contributor reduced NOx (accounting 38 43 abatement, respectively) 2015–2017, its effect became very limited afterwards as had commonly completed by 2017. Instead, extensive coal-fired boilers upgrade renovation non-electrical industry measures 2017–2019, accounting collectively 61 49 57 PM2.5, Controls industrial sectors effective two while relating other (transportation solvent replacement) become recent years. provincial demonstrated support modeling Through scenario setting modeling, worsened meteorological conditions 2019 alleviation. However, efforts controls identified largely overcome negative influence variation. changed contribute 4.3 5.5 µg m−3 concentration 2015–2017 While elevated 4.9 led 3.1 partly (not fully though) offsetting meteorology-driven growth. analysis justified validity local provided scientific basis formulate prevention policies regions worldwide.
Язык: Английский
Процитировано
18
Atmospheric Research, Год журнала: 2024, Номер 301, С. 107287 - 107287
Опубликована: Фев. 8, 2024
Язык: Английский
Процитировано
8