Long-term trends of black carbon levels, sources, and radiative effects from 2013 to 2022 in Beijing, China DOI Creative Commons
Yu Xie, Linghan Zeng, Shuya Hu

et al.

Published: May 1, 2025

Abstract Black carbon (BC), from incomplete combustion of biomass burning and fossil fuels, significantly impacts air pollution climate. A long-term analysis BC sources radiative effects in key regions is essential for the development refinement more targeted quality management strategies. However, there a lack sufficient studies addressing this issue. This study examines levels 2013 to 2022. Results show that measures lowered concentrations 2.23 ± 1.94 μg m −3 0.84 0.71 The most significant reductions occurred during heating season, which attributed transition coal-based energy cleaner-burning gas. Significant were observed both fuels sources, with average annual reduction rates 0.06 0.01 yr −1 0.13 0.03 , respectively. notably lowest 2020 2021, primarily due traffic control implemented COVID-19. period offers relevant scenario examining trends under restricted conditions. relaxation these 2022 led subsequent rise levels. To isolate pandemic’s effect accurately assess effectiveness measures, direct was calculated 2019, showing 80% reduction. research provides evidence understanding Beijing its response previous supporting effective, strategies critical sustaining improvements climate outcomes.

Language: Английский

Near-Time Measurement of Aerosol Optical Depth and Black Carbon Concentration at Socheongcho Ocean Research Station: Aerosol Episode Case Analysis DOI Creative Commons
Soi Ahn,

Mee-Hye Lee,

Hyeon-Su Kim

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(3), P. 382 - 382

Published: Jan. 23, 2025

This study examined the seasonal variations and influencing factors for black carbon (BC) concentrations aerosol optical depth (AOD) at Socheongcho Ocean Research Station (SORS) on Korean Peninsula from July 2019 to December 2020. An AOD algorithm was developed validated using Geo-KOMPSAT-2A (GK-2A) satellite. The GK-2A demonstrated comparable performance that of Low Earth Orbit satellites, including Terra/MODIS (R2 = 0.86), Aqua/MODIS 0.83), AERONET AODs 0.85). Multi-angle absorption photometry revealed average BC were highest in winter (0.91 ± 0.80 µg·m−3), followed by fall (0.80 0.66 wet summer (0.75 0.55 dry (0.52 0.20 µg·m−3). higher (0.45 0.37 µg·m−3) than winter. effects meteorological parameters, wavelength, gaseous substances investigated. SHapley Additive exPlanations-based feature importance analysis identified temperature, relative humidity (RH), evaporation as major contributors. increased, along with PM2.5 CO levels, due combustion processes during Analysis high-aerosol-loading cases an increase fine-mode fraction, emphasizing AOD. Thus, long-range transport local sources played a critical role SORS.

Language: Английский

Citations

0
Long-term trends of black carbon levels, sources, and radiative effects from 2013 to 2022 in Beijing, China DOI Creative Commons
Yu Xie, Linghan Zeng, Shuya Hu

et al.

Published: May 1, 2025

Abstract Black carbon (BC), from incomplete combustion of biomass burning and fossil fuels, significantly impacts air pollution climate. A long-term analysis BC sources radiative effects in key regions is essential for the development refinement more targeted quality management strategies. However, there a lack sufficient studies addressing this issue. This study examines levels 2013 to 2022. Results show that measures lowered concentrations 2.23 ± 1.94 μg m −3 0.84 0.71 The most significant reductions occurred during heating season, which attributed transition coal-based energy cleaner-burning gas. Significant were observed both fuels sources, with average annual reduction rates 0.06 0.01 yr −1 0.13 0.03 , respectively. notably lowest 2020 2021, primarily due traffic control implemented COVID-19. period offers relevant scenario examining trends under restricted conditions. relaxation these 2022 led subsequent rise levels. To isolate pandemic’s effect accurately assess effectiveness measures, direct was calculated 2019, showing 80% reduction. research provides evidence understanding Beijing its response previous supporting effective, strategies critical sustaining improvements climate outcomes.

Language: Английский

Citations

0