Exploring the sources of light-absorbing carbonaceous aerosols by integrating observational and modeling results: insights from Northeast China DOI Creative Commons
Yuan Cheng,

Xu-bing Cao,

Sheng-qiang Zhu

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(17), P. 9869 - 9883

Published: Sept. 6, 2024

Abstract. Light-absorbing carbonaceous aerosols are important contributors to both air pollution and radiative forcing. However, their abundances sources remain poorly constrained, as can be seen from the frequently identified discrepancies between observed modeled results. In this study, we focused on elemental carbon (EC; a measure of black carbon) light-absorbing organic (i.e., BrC) in Northeast China, new targeted region latest clean-air actions China. Three campaigns were conducted during 2018–2021 Harbin, covering distinct meteorological conditions emission features. Various analytical methods first evaluated, mass concentrations BrC EC validated. The validated measurement results then used for source apportionment, together with other species including tracers (e.g., levoglucosan). observation-based suggested that despite frigid winter formation secondary (SOC) was enhanced at high levels relative humidity (RH). This enhancement could also captured by an quality model incorporating heterogeneous chemistry. failed reproduce SOC, significant underestimations regardless RH levels. addition, agricultural fires effectively increased primary (POC) POC ratios. Such roles not model, pointing substantial underestimation open burning emissions inventory. problem merits particular attention given its massive sector.

Language: Английский

AI-Driven UAV Surveillance for Agricultural Fire Safety DOI Creative Commons
Akmalbek Abdusalomov, Sabina Umirzakova,

Komil Tashev

et al.

Fire, Journal Year: 2025, Volume and Issue: 8(4), P. 142 - 142

Published: April 2, 2025

The increasing frequency and severity of agricultural fires pose significant threats to food security, economic stability, environmental sustainability. Traditional fire-detection methods, relying on satellite imagery ground-based sensors, often suffer from delayed response times high false-positive rates, limiting their effectiveness in mitigating fire-related damages. In this study, we propose an advanced deep learning-based framework that integrates the Single-Shot MultiBox Detector (SSD) with computationally efficient MobileNetV2 architecture. This integration enhances real-time fire- smoke-detection capabilities while maintaining a lightweight deployable model suitable for Unmanned Aerial Vehicle (UAV)-based monitoring. proposed was trained evaluated custom dataset comprising diverse fire scenarios, including various conditions intensities. Comprehensive experiments comparative analyses against state-of-the-art object-detection models, such as You Only Look Once (YOLO), Faster Region-based Convolutional Neural Network (Faster R-CNN), SSD-based variants, demonstrated superior performance our model. results indicate approach achieves mean Average Precision (mAP) 97.7%, significantly surpassing conventional models detection speed 45 frames per second (fps) requiring only 5.0 GFLOPs computational power. These characteristics make it particularly deployment edge-computing environments, UAVs remote monitoring systems.

Language: Английский

Citations

1
Spatial–temporal patterns in anthropogenic and biomass burning emission contributions to air pollution and mortality burden changes in India from 1995 to 2014 DOI Creative Commons
Bin Luo, Yuqiang Zhang, Tao Tang

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(9), P. 4767 - 4783

Published: May 8, 2025

Abstract. Anthropogenic (ANTHRO) and biomass burning (BB) emissions are major contributors to ambient air pollution, with the latter playing a particularly dominant role in nonurban regions. India has experienced dramatic deterioration quality over past few decades, but no systematic assessment been conducted investigate individual contributions of ANTHRO BB emission changes long term India, areas. In this study, we conduct comprehensive analysis long-term trends particulate matter aerodynamic diameters < 2.5 µm (PM2.5) ozone (O3) their mortality burden from 1995 2014, using state-of-the-art high-resolution global chemical transport model (CAM-chem). Our simulations reveal substantial nationwide increase annual mean PM2.5 (6.71 µg m−3 per decade) O3 (7.08 ppbv decade), Indo-Gangetic Plain (IGP) eastern central serving as hotspots for trend changes, respectively. It is noteworthy that decreases were observed northern IGP, potentially linked nitric oxide (NO) titration due surge nitrogen oxides (NOx) emissions. Sensitivity analyses highlight primary rising O3, while play prominent winter spring. years high activity, both comparable or even exceeded specific We further estimate elevated pollutant levels associated increased premature attributable leading 97 830 73 911 deaths decade. Although there decrease capita IGP region, population offset its effectiveness.

Language: Английский

Citations

0
Methods, Progress and Challenges in Global Monitoring of Carbon Emissions from Biomass Combustion DOI Creative Commons
Ge Qu, Yusheng Shi, Yongliang Yang

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(10), P. 1247 - 1247

Published: Oct. 18, 2024

Global biomass burning represents a significant source of carbon emissions, exerting substantial influence on the global cycle and climate change. As emissions become increasingly concerning, accurately quantifying from has emerged as pivotal challenging area scientific research. This paper presents comprehensive review primary monitoring techniques for burning, encompassing both bottom-up top-down approaches. It examines current status limitations these in practice. The method primarily employs terrestrial ecosystem models, emission inventory methods, fire radiation power (FRP) techniques, which rely integration activity data factors to estimate emissions. atmospheric observation chemical transport models invert fluxes. Both methods continue face challenges, such limited satellite resolution affecting accuracy, uncertainties regions lacking ground validation, difficulties model optimization due complexity processes. In light considerations, this explores prospective evolution technology with particular emphasis significance high-precision estimation methodologies, technological advancements remote sensing, inventories. study aims provide forward-looking perspective offering valuable reference point related research policy formulation.

Language: Английский

Citations

1
Soil Emissions of Reactive Oxidized Nitrogen Reduce the Effectiveness of Anthropogenic Source Control in China DOI

Yurun Wang,

Yanan Wang, Qinyi Li

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(47), P. 21015 - 21024

Published: Nov. 15, 2024

Nitrogen dioxide (NO

Language: Английский

Citations

1
Spatial-temporal patterns of anthropogenic and biomass burning contributions on air pollution and mortality burden changes in India from 1995 to 2014 DOI Creative Commons
Bin Luo, Yuqiang Zhang, Tao Tang

et al.

Published: May 6, 2024

Abstract. Anthropogenic and biomass burning emissions are the major sources of ambient air pollution. India has experienced a dramatic deterioration in quality over past few decades, but no systematic assessment been made to investigate individual contributions anthropogenic emissions. In this study, we conducted pioneering comprehensive analysis long-term trends particulate matter with aerodynamic diameters < 2.5 μm (PM2.5) ozone (O3) their mortality burden changes from 1995 2014, using state-of-the-art high-resolution global chemical transport model (CAM-chem). Our simulations revealed substantial nationwide increase annual mean PM2.5 (6.71 μg m-3 decade-1) O3 (7.08 ppbv decade-1), Indo-Gangetic Plain (IGP) eastern central as hotspots for trend individually. Noteworthy decreases were observed northern IGP which potentially linked NO titration due surge NOx Sensitivity analyses highlighted primary contributors rising O3, while played prominent role winter spring. years high activity, BB on both comparable or even exceeding specific areas. The elevated pollutants associated increased premature attributable leading 97.83 K 73.91 per decade. Despite capita decrease region, population offset its effectiveness.

Language: Английский

Citations

0
Exploring the sources of light-absorbing carbonaceous aerosols by integrating observational and modeling results: insights from Northeast China DOI Creative Commons
Yuan Cheng,

Xu-bing Cao,

Sheng-qiang Zhu

et al.

Published: May 21, 2024

Abstract. Light-absorbing carbonaceous aerosols are important contributors to both air pollution and radiative forcing. However, their abundances sources still subject non-negligible uncertainties, which highly responsible for the frequently-identified discrepancies between observed modeled results. In this study, we focused on elemental carbon (EC) light-absorbing organic (i.e., BrC) in Northeast China, a new targeted region of latest clean actions China. Three campaigns were conducted during 2018‒2021 Harbin, covering distinct meteorological conditions emission features. Various analytical methods first evaluated, mass concentrations BrC EC validated. The validated measurement results then used source apportionment, together with other species including tracers (e.g., levoglucosan). observation-based suggested that despite frigid winter formation secondary aerosol (SOA) was enhanced at high levels relative humidity (RH). This enhancement could also be captured by an quality model incorporating heterogeneous chemistry. failed reproduce SOA, significant underestimations regardless RH levels. addition, agricultural fires effectively increased primary (POC) POC ratios. Such roles not model, pointing substantial underestimation open burning emissions inventory. problem merits particular attention given its massive sector.

Language: Английский

Citations

0
Comment on egusphere-2024-974 DOI Creative Commons
Bin Luo, Yuqiang Zhang, Tao Tang

et al.

Published: May 30, 2024

Abstract. Anthropogenic and biomass burning emissions are the major sources of ambient air pollution. India has experienced a dramatic deterioration in quality over past few decades, but no systematic assessment been made to investigate individual contributions anthropogenic emissions. In this study, we conducted pioneering comprehensive analysis long-term trends particulate matter with aerodynamic diameters < 2.5 μm (PM2.5) ozone (O3) their mortality burden changes from 1995 2014, using state-of-the-art high-resolution global chemical transport model (CAM-chem). Our simulations revealed substantial nationwide increase annual mean PM2.5 (6.71 μg m-3 decade-1) O3 (7.08 ppbv decade-1), Indo-Gangetic Plain (IGP) eastern central as hotspots for trend individually. Noteworthy decreases were observed northern IGP which potentially linked NO titration due surge NOx Sensitivity analyses highlighted primary contributors rising O3, while played prominent role winter spring. years high activity, BB on both comparable or even exceeding specific areas. The elevated pollutants associated increased premature attributable leading 97.83 K 73.91 per decade. Despite capita decrease region, population offset its effectiveness.

Language: Английский

Citations

0
Comment on egusphere-2024-1260 DOI Creative Commons
Yuan Cheng,

Xu-bing Cao,

Sheng-qiang Zhu

et al.

Published: June 2, 2024

Abstract. Light-absorbing carbonaceous aerosols are important contributors to both air pollution and radiative forcing. However, their abundances sources still subject non-negligible uncertainties, which highly responsible for the frequently-identified discrepancies between observed modeled results. In this study, we focused on elemental carbon (EC) light-absorbing organic (i.e., BrC) in Northeast China, a new targeted region of latest clean actions China. Three campaigns were conducted during 2018‒2021 Harbin, covering distinct meteorological conditions emission features. Various analytical methods first evaluated, mass concentrations BrC EC validated. The validated measurement results then used source apportionment, together with other species including tracers (e.g., levoglucosan). observation-based suggested that despite frigid winter formation secondary aerosol (SOA) was enhanced at high levels relative humidity (RH). This enhancement could also be captured by an quality model incorporating heterogeneous chemistry. failed reproduce SOA, significant underestimations regardless RH levels. addition, agricultural fires effectively increased primary (POC) POC ratios. Such roles not model, pointing substantial underestimation open burning emissions inventory. problem merits particular attention given its massive sector.

Language: Английский

Citations

0
Comment on egusphere-2024-1260 DOI Creative Commons
Yuan Cheng,

Xu-bing Cao,

Sheng-qiang Zhu

et al.

Published: June 4, 2024

Abstract. Light-absorbing carbonaceous aerosols are important contributors to both air pollution and radiative forcing. However, their abundances sources still subject non-negligible uncertainties, which highly responsible for the frequently-identified discrepancies between observed modeled results. In this study, we focused on elemental carbon (EC) light-absorbing organic (i.e., BrC) in Northeast China, a new targeted region of latest clean actions China. Three campaigns were conducted during 2018‒2021 Harbin, covering distinct meteorological conditions emission features. Various analytical methods first evaluated, mass concentrations BrC EC validated. The validated measurement results then used source apportionment, together with other species including tracers (e.g., levoglucosan). observation-based suggested that despite frigid winter formation secondary aerosol (SOA) was enhanced at high levels relative humidity (RH). This enhancement could also be captured by an quality model incorporating heterogeneous chemistry. failed reproduce SOA, significant underestimations regardless RH levels. addition, agricultural fires effectively increased primary (POC) POC ratios. Such roles not model, pointing substantial underestimation open burning emissions inventory. problem merits particular attention given its massive sector.

Language: Английский

Citations

0
Exploring the sources of light-absorbing carbonaceous aerosols by integrating observational and modeling results: insights from Northeast China DOI Creative Commons
Yuan Cheng,

Xu-bing Cao,

Sheng-qiang Zhu

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(17), P. 9869 - 9883

Published: Sept. 6, 2024

Abstract. Light-absorbing carbonaceous aerosols are important contributors to both air pollution and radiative forcing. However, their abundances sources remain poorly constrained, as can be seen from the frequently identified discrepancies between observed modeled results. In this study, we focused on elemental carbon (EC; a measure of black carbon) light-absorbing organic (i.e., BrC) in Northeast China, new targeted region latest clean-air actions China. Three campaigns were conducted during 2018–2021 Harbin, covering distinct meteorological conditions emission features. Various analytical methods first evaluated, mass concentrations BrC EC validated. The validated measurement results then used for source apportionment, together with other species including tracers (e.g., levoglucosan). observation-based suggested that despite frigid winter formation secondary (SOC) was enhanced at high levels relative humidity (RH). This enhancement could also captured by an quality model incorporating heterogeneous chemistry. failed reproduce SOC, significant underestimations regardless RH levels. addition, agricultural fires effectively increased primary (POC) POC ratios. Such roles not model, pointing substantial underestimation open burning emissions inventory. problem merits particular attention given its massive sector.

Language: Английский

Citations

0