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A review of the technology and applications of methods for evaluating the transport of air pollutants SCIE
期刊论文 | 2023 , 123 , 341-349 | JOURNAL OF ENVIRONMENTAL SCIENCES
WoS CC Cited Count: 1
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Abstract :

A variety of methods based on air quality models, including tracer methods, the brute-force method (BFM), decoupled direct method (DDM), high-order decoupled direct method (HDDM), response surface models (RSMs) and so on forth, have been widely used to study the transport of air pollutants. These methods have good applicability for the transport of air pollutants with simple formation mechanisms. However, differences in research conclusions on secondary pollutants with obvious nonlinear characteristics have been reported. For example, the tracer method is suitable for the study of simplified scenarios, while HDDM and RSMs are more suitable for the study for nonlinear pollutants. Multiple observation techniques, including conventional air pollutant observation, lidar observation, air sounding balloons, vehicle-mounted and ship-borne technology, aerial surveys, and remote sensing observations, have been utilized to investigate air pollutant transport characteristics with time resolution as high as 1 sec. In addition, based on a multi-regional input-output model combined with emission inventories, the transfer of air pollutant emissions can be evaluated and applied to study the air pollutant transport characteristics. Observational technologies have advantages in temporal resolution and accuracy, while modeling technologies are more flexible in spatial resolution and research plan setting. In order to accurately quantify the transport characteristics of pollutants, it is necessary to develop a research method for interactive verification of observation and simulation. Quantitative evaluation of the transport of air pollutants from different angles can provide a scientific basis for regional joint prevention and control. (c) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

Keyword :

Transport flux Transport flux Air pollutant transport Air pollutant transport Simulation technology Simulation technology Observation technology Observation technology Transport matrix Transport matrix

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GB/T 7714 Wang, Xiaoqi , Cheng, Shuiyuan , Zhou, Ying et al. A review of the technology and applications of methods for evaluating the transport of air pollutants [J]. | JOURNAL OF ENVIRONMENTAL SCIENCES , 2023 , 123 : 341-349 .
MLA Wang, Xiaoqi et al. "A review of the technology and applications of methods for evaluating the transport of air pollutants" . | JOURNAL OF ENVIRONMENTAL SCIENCES 123 (2023) : 341-349 .
APA Wang, Xiaoqi , Cheng, Shuiyuan , Zhou, Ying , Zhang, Hanyu , Guan, Panbo , Zhang, Zhida et al. A review of the technology and applications of methods for evaluating the transport of air pollutants . | JOURNAL OF ENVIRONMENTAL SCIENCES , 2023 , 123 , 341-349 .
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The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015-2019 SCIE SSCI
期刊论文 | 2022 , 14 (7) | SUSTAINABILITY
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Abstract :

Great changes occurred in the physical and chemical properties of the atmosphere in the North China Plain (NCP) in summer caused by PM2.5 dropping from 58 mu g/m(3) in 2015 to 36.0 mu g/m(3) in 2019. In this study, we first applied the WRF-Chem model to quantify the impact of PM2.5 reduction on shortwave radiation reaching the ground (SWDOWN), planetary boundary layer height (PBLH), and the surface concentration of air pollutants (represented by CO). Simulation results obtained an increase of 15.0% in daytime SWDOWN and 9.9% in daytime PBLH, and a decrease of -5.0% in daytime CO concentration. These changes were induced by the varied PM2.5 levels. Moreover, the variation in SWDOWN further led to a rise in the NO2 photolysis rate (JNO(2)) over this region, by 1.82 x 10(-4)similar to 1.91 x 10(-4) s(-1) per year. Afterwards, we employed MCM chemical box model to explore how the JNO(2) increase and the precursor decrease (CO, VOCs, and NOx) influenced O-3 and HO2 radicals. The results revealed that the photolysis rate U) increase would individually cause a change on daytime surface O-3, OH, and HO2 radicals by +9.0%, +18.9%, and +23.7%; the corresponding change induced by the precursor decrease was -2.5%, +1.9%, and -2.3%. At the same time, the integrated impacts of the change in J and precursors cause an increase of +6.3%, +21.1%, and +20.9% for daytime surface O-3, OH, and HO2. Generally, the atmospheric oxidation capacity significantly enhanced during summer in NCP due to the PM2.5 dropping in recent years. This research can help understand atmosphere changes caused by PM2.5 reduction comprehensively.

Keyword :

chemical box model chemical box model atmospheric oxidation capacity atmospheric oxidation capacity WRF-Chem WRF-Chem photolysis rates photolysis rates

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GB/T 7714 Ou, Shengju , Wei, Wei , Cai, Bin et al. The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015-2019 [J]. | SUSTAINABILITY , 2022 , 14 (7) .
MLA Ou, Shengju et al. "The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015-2019" . | SUSTAINABILITY 14 . 7 (2022) .
APA Ou, Shengju , Wei, Wei , Cai, Bin , Chen, Saisai , Guan, Panbo , Cheng, Shuiyuan . The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015-2019 . | SUSTAINABILITY , 2022 , 14 (7) .
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基于卫星遥感和地面观测的人为源VOCs区域清单多维校验 CSCD
期刊论文 | 2021 , 42 (06) , 2713-2720 | 环境科学
CNKI Cited Count: 1
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Abstract :

本文针对京津冀区域,基于传统的排放因子法建立了区域人为源VOCs物种排放清单;并基于区域卫星遥感甲醛信息和典型城市地面VOCs观测信息,开展了VOCs物种清单多维校验研究.清单计算结果表明,该区域2013、2015和2017年VOCs排放量分别为202.67、207.34和193.42万t,以烷烃(29.83%~30.72%)、不饱和烃(16.54%~17.68%)、芳香烃(27.14%~27.51%)、醛(8.75%~9.52%)、酮(8.13%~9.04%)和醇醚酯(5.13%~6.60%)为主.2013~2017年VOCs清单排量,张家口、秦皇岛和衡水小幅上升(每年1.10%~1.66%...

Keyword :

物种清单 物种清单 地面观测 地面观测 卫星遥感 卫星遥感 清单校验 清单校验 挥发性有机物(VOCs) 挥发性有机物(VOCs)

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GB/T 7714 王玥 , 魏巍 , 任云婷 et al. 基于卫星遥感和地面观测的人为源VOCs区域清单多维校验 [J]. | 环境科学 , 2021 , 42 (06) : 2713-2720 .
MLA 王玥 et al. "基于卫星遥感和地面观测的人为源VOCs区域清单多维校验" . | 环境科学 42 . 06 (2021) : 2713-2720 .
APA 王玥 , 魏巍 , 任云婷 , 王晓琦 , 陈赛赛 , 程水源 . 基于卫星遥感和地面观测的人为源VOCs区域清单多维校验 . | 环境科学 , 2021 , 42 (06) , 2713-2720 .
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Evaluation of continuous emission reduction effect on PM2.5 pollution improvement through 2013-2018 in Beijing SCIE
期刊论文 | 2021 , 12 (5) | ATMOSPHERIC POLLUTION RESEARCH
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Beijing has achieved significant air quality improvement over the past decade. In this study, we applied a simulation technique on pollutant monitoring data to investigate the contribution of emission reduction (ERE) and meteorological effects (ME) to the improvement of air quality. We measured the daily PM2.5 concentrations during four months (representing the four seasons) in 2013 and 2018. We found that the concentrations of NH4+, NO3, and SO42- decreased from 2013 to 2018, but the proportion of NO3 in PM2.5 showed an apparent increase. Multiple scenarios were simulated using the WRF-CAMx model to determine the impact of ERE and ME on air pollution. The results showed that both variables positively contributed to the annual air quality improvement, with ERE contributing more than 70% to the total PM2.5 reduction. However, their seasonal contributions showed notable differences. In winter, ME contributed more than 40 mu g/m(3) to the PM2.5 decrease, which was much higher than that in other seasons. This suggests that the positive effect of pollutant emission reduction on air quality may have been weakened under extremely adverse meteorological conditions. Hence, the monitoring and modeling results were coupled to evaluate the secondary conversion degree. We found that the emissions of precursors, including SO2 and NOx, notably decreased, but both the local and regional conversion degrees increased from 2013 to 2018. Therefore, for effective air pollution reduction, we suggest that future air pollution mitigation measures should focus on reducing secondary pollution in Beijing.

Keyword :

Secondary conversion degree Secondary conversion degree Emission reduction effect Emission reduction effect Meteorological effect Meteorological effect Air quality improvement Air quality improvement

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GB/T 7714 Wang, Xiaoqi , Wei, Wei , Cheng, Shuiyuan et al. Evaluation of continuous emission reduction effect on PM2.5 pollution improvement through 2013-2018 in Beijing [J]. | ATMOSPHERIC POLLUTION RESEARCH , 2021 , 12 (5) .
MLA Wang, Xiaoqi et al. "Evaluation of continuous emission reduction effect on PM2.5 pollution improvement through 2013-2018 in Beijing" . | ATMOSPHERIC POLLUTION RESEARCH 12 . 5 (2021) .
APA Wang, Xiaoqi , Wei, Wei , Cheng, Shuiyuan , Wang, Ruipeng , Zhu, Jiaxian . Evaluation of continuous emission reduction effect on PM2.5 pollution improvement through 2013-2018 in Beijing . | ATMOSPHERIC POLLUTION RESEARCH , 2021 , 12 (5) .
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Characteristics, evolution, and potential source regions of submicron aerosol in Beijing, China EI
期刊论文 | 2021 , 246 | Atmospheric Environment
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Atmospheric fine particulate pollution has been a dramatically environmental concern in all seasons in the megacity Beijing in recent years. A long-term real-time monitoring campaign of non-refractory submicron aerosol (NR-PM1) at a southeastern urban site in Beijing from July 13, 2017 to May 26, 2018 using an Aerodyne Aerosol Chemical Speciation Monitor (ACSM) was carried out to investigate the characteristics and evolution processes of NR-PM1 and its potential source effects. The annual average concentration of NR-PM1 during the entire study period was 40.8 μg/m3, lower than that of NR-PM1 from July 2011 to June 2012, and its seasonal variation presented the order of autumn and spring > winter > summer. The average concentration of organic species Org in the entire study was 15.1 μg/m3 and accounted for 37% of NR-PM1, being consistently a significant component of NR-PM1 in the four seasons. The average concentrations of SO42− and NO3− were 8.6 and 11.1 μg/m3, respectively, accounting for 21% and 27% of NR-PM1, and NO3− and its contribution to NR-PM1 exceeded those of SO42−, suggesting that secondary nitrate became a more dramatic pollutant. Note that SO42− in summer accounted for 27% of NR-PM1, higher than those in the other seasons, indicating that secondary sulfate formation was greatly important in summer, however, NO3− in summer accounted for 22% of NR-PM1, lower than those in the other seasons, more likely due to relatively high temperature in summer being favorable for dissociation of nitrate. NH4+ and Cl− species presented lower mass concentrations and mass fractions, and the seasonal variation of NH4+ was similar to NO3−, yet Cl− presented a typical seasonal change related to intense fossil fuel combustion during the heating period in winter and biomass burning in autumn with an order of winter > autumn > spring > summer. All aerosol species exhibited different diurnal cycles, of which Org presented a bimodal mode, SO42− and Cl− showed a flatter diurnal pattern, however, NO3− and NH4+ displayed more similar single-peak patterns. The conversion of SO2 to SO42− presented an obvious seasonal variation with summer > autumn > spring > winter driven by different factors. The conversion of NO2 to NO3− also showed a significant seasonal change characterized by autumn > summer and spring > winter controlled by different factors. Relative humidity, temperature and wind speed during the study period were significant meteorological elements influencing NR-PM1 and its species, and heavy haze pollution episodes largely occurred under high relative humidity and low wind speed. High potential source regions influencing NR-PM1 pollution in Beijing in all seasons presented dramatically distributions related to wind directions. © 2020 Elsevier Ltd

Keyword :

Pollution Pollution Fossil fuels Fossil fuels Aerosols Aerosols Wind Wind Chemical speciation Chemical speciation Urban growth Urban growth Atmospheric humidity Atmospheric humidity Nitrates Nitrates Sulfur dioxide Sulfur dioxide

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GB/T 7714 Han, Lihui , Yan, Haitao , Xiang, Xin et al. Characteristics, evolution, and potential source regions of submicron aerosol in Beijing, China [J]. | Atmospheric Environment , 2021 , 246 .
MLA Han, Lihui et al. "Characteristics, evolution, and potential source regions of submicron aerosol in Beijing, China" . | Atmospheric Environment 246 (2021) .
APA Han, Lihui , Yan, Haitao , Xiang, Xin , Liu, Xinhang , Shi, Ruifang , Wang, Haibin et al. Characteristics, evolution, and potential source regions of submicron aerosol in Beijing, China . | Atmospheric Environment , 2021 , 246 .
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Insights into atmospheric oxidation capacity and its impact on PM2.5 in megacity Beijing via volatile organic compounds measurements EI
期刊论文 | 2021 , 258 | Atmospheric Research
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This study conducted a VOCs monitoring campaign in Jul and Oct of 2018, Jan and Apr of 2019 in Beijing urban area, to explore the atmospheric oxidation capacity and its impact on PM2.5 there through investigating the chemical behaviors of VOCs at a 1-h time resolution. We totally detected 53 VOCs in the atmosphere over Beijing, sum of them (TVOCs) reaching 29.0 ± 12.9, 47.6 ± 29.4, 45.7 ± 56.4 and 35.8 ± 19.3 ppb (mol/mol) in Jul, Oct, Jan and Apr respectively. The gap between VOCs and CO diurnal amplitudes presented the trend of Jul > Oct and Apr > Jan, which implies the more chemical loss of VOCs in non-winter seasons compared to winter. Then, according to the notable difference in OH- and O3- reactivity of various VOCs, hourly OH exposure ([OH]Δt), O3 exposure ([O3]Δt) and OH concentration were estimated. In result, in Jul, Oct, Jan and Apr, the daily [OH]Δt was 10.39 ± 4.95, 11.10 ± 6.01, 6.39 ± 3.74 and 8.96 ± 5.05 × 1010 molecules·s·cm−3, the nighttime [O3]Δt was 9.43 ± 2.83, 5.22 ± 3.62, 5.79 ± 3.65 and 8.60 ± 4.74 × 1015 molecules·s·cm−3, and the daily OH was 9.76 ± 5.17, 5.11 ± 2.98, 2.95 ± 2.18 and 6.26 ± 3.18 × 106 molecules·cm−3, in respective. The OH peak magnitudes agreed well with the OH measured in-site, which indicates the reliability of our estimates on the oxidation capacity of atmosphere over Beijing. During our studied periods, [OH]Δt, OH and atmospheric oxidability combining OH and O3 (ACO) were all positively related to PM2.5 in Jul and Apr; only [OH]Δt was positively related to PM2.5 in Oct; while [OH]Δt, OH and ACO were all negatively related to PM2.5 in Jan. The proportion of SO2 and VOCs oxidized through gaseous OH reactions was found to increase with PM2.5 increasing in non-winter seasons, but decrease with PM2.5 increasing in winter. It means that high PM2.5 concentrations are attributed more to gas-phase oxidations in non-winter seasons and potentially boosted by photochemistry in summer and spring. But, in winter high PM2.5 concentrations effectively inhibit photolysis reactions and weaken atmospheric oxidation capacity, which makes high PM2.5 less dependent on the gas-phase oxidations. © 2021 Elsevier B.V.

Keyword :

Volatile organic compounds Volatile organic compounds Gas chromatography Gas chromatography Free radicals Free radicals Oxidation Oxidation Molecules Molecules Atmospheric chemistry Atmospheric chemistry

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GB/T 7714 Wei, Wei , Wang, Yue , Bai, Hongxiang et al. Insights into atmospheric oxidation capacity and its impact on PM2.5 in megacity Beijing via volatile organic compounds measurements [J]. | Atmospheric Research , 2021 , 258 .
MLA Wei, Wei et al. "Insights into atmospheric oxidation capacity and its impact on PM2.5 in megacity Beijing via volatile organic compounds measurements" . | Atmospheric Research 258 (2021) .
APA Wei, Wei , Wang, Yue , Bai, Hongxiang , Wang, Xiaoqi , Cheng, Shuiyuan , Wang, Litao . Insights into atmospheric oxidation capacity and its impact on PM2.5 in megacity Beijing via volatile organic compounds measurements . | Atmospheric Research , 2021 , 258 .
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Agricultural ammonia emissions and its impact on PM2.5 concentrations in the Beijing-Tianjin-Hebei region from 2000 to 2018 SCIE
期刊论文 | 2021 , 291 | ENVIRONMENTAL POLLUTION
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Ammonia (NH3) discharged from agricultural activities to the atmosphere plays a crucial role in the formation of secondary inorganic aerosols. This study analyzed the temporal-spatial development of agricultural NH3 emissions from 2000 to 2018 in the Beijing-Tianjin-Hebei (BTH) region and assessed the effects of reducing PM2.5 by removing agricultural NH3 using an air quality model. The results showed that the interannual agricultural NH3 emissions in the BTH region exhibited a stairs trend from 2000 to 2018, with an average of 971.63 Gg. In particular, agricultural NH3 emissions in the BTH region reached a maximum in summer when the temperature was high and were more concentrated in the southern plains compared to the northern areas. Under the reduction scenario (RS), the agricultural NH3 emissions in the BTH region in 2015, 2016, 2017, and 2018 were reduced by 2.95%, 4.10%, 18.75%, and 10.21%, resulting in a reduction of 0.5%, 0.5%, 2.5%, and 1.2% of annual mean PM2.5 concentration, respectively, compared with the baseline scenario (BS). Furthermore, agricultural NH3 emissions contributed 12.6, 12.1, 11.9, and 11.3 mu g m(-3) to PM2.5 concentrations in 2015, 2016, 2017, and 2018 under the zero-emission scenario (ZS), respectively. However, the contribution rates exhibited a slightly increasing trend from 20.5% in 2015 to 24.6% in 2018. These findings could provide a new understanding of agricultural NH3 emission trends and their impacts on PM2.5 concentration based on actual NH3 mitigation ratios in recent years, thereby guiding the formulation of future control strategies.

Keyword :

PM2.5 PM2.5 Ammonia Ammonia Reduction effects Reduction effects Emission trends Emission trends

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GB/T 7714 Cheng, Long , Ye, Zhilan , Cheng, Shuiyuan et al. Agricultural ammonia emissions and its impact on PM2.5 concentrations in the Beijing-Tianjin-Hebei region from 2000 to 2018 [J]. | ENVIRONMENTAL POLLUTION , 2021 , 291 .
MLA Cheng, Long et al. "Agricultural ammonia emissions and its impact on PM2.5 concentrations in the Beijing-Tianjin-Hebei region from 2000 to 2018" . | ENVIRONMENTAL POLLUTION 291 (2021) .
APA Cheng, Long , Ye, Zhilan , Cheng, Shuiyuan , Guo, Xiurui . Agricultural ammonia emissions and its impact on PM2.5 concentrations in the Beijing-Tianjin-Hebei region from 2000 to 2018 . | ENVIRONMENTAL POLLUTION , 2021 , 291 .
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Improving source inversion performance of airborne pollutant emissions by modifying atmospheric dispersion scheme through sensitivity analysis combined with optimization model. PubMed
期刊论文 | 2021 , 284 , 117186 | Environmental pollution
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Estimating accurately airborne pollutant emissions source information (source strength and location) is important for achieving effective air pollution management or adequate emergency responses to accidents. Inversion method is one of the useful tools to identify the source parameters. The atmospheric dispersion scheme has been proven to be the key to determining the source inversion performance by influencing the accuracy of the dispersion models. Modifying the atmospheric dispersion scheme is an important potential method to improve the inversion performance, but this has not been studied previously. To fill this gap, a novel approach for parameter sensitivity analysis combined with an optimization method was proposed to improve the source inversion performance by optimizing empirical scheme. The dispersion coefficients σy and σz of the typical BRIGGS scheme under different atmospheric dispersion conditions were optimized and used for air pollutant dispersion and source inversion. The results showed that the prediction performance of the air pollutant concentrations was greatly improved with statistical indices |FB| and NMSE decreased by 0.22 and 2.07, respectively; FAC2 and R increased by 0.10, and 0.08, respectively. For source inversion, the results of the significance analysis suggested that the accuracy in the source strength and location parameter (x0) were both significantly improved by ∼271% (relative deviation reduced from 60.0% to 16.2%) and ∼121% (absolute deviation reduced from 27.6 to 12.5 m). The improvement of source strength inversion accuracy was more significant under unstable atmospheric conditions (stability class A, B, and C); the mean absolute relative deviation was reduced by 97.5%. These results can help to obtain more accurate source information and to provide reliable reference for air pollution managements or emergency response to accidents. This study provides a novel and versatile approach to improve estimation performance of pollutant emission sources and enhances our understanding of source inversion.

Keyword :

Atmospheric dispersion coefficients Atmospheric dispersion coefficients Air pollutant emissions Air pollutant emissions Sensitivity analysis Sensitivity analysis Source inversion Source inversion Dispersion scheme optimization Dispersion scheme optimization

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GB/T 7714 Mao Shushuai , Lang Jianlei , Chen Tian et al. Improving source inversion performance of airborne pollutant emissions by modifying atmospheric dispersion scheme through sensitivity analysis combined with optimization model. [J]. | Environmental pollution , 2021 , 284 : 117186 .
MLA Mao Shushuai et al. "Improving source inversion performance of airborne pollutant emissions by modifying atmospheric dispersion scheme through sensitivity analysis combined with optimization model." . | Environmental pollution 284 (2021) : 117186 .
APA Mao Shushuai , Lang Jianlei , Chen Tian , Cheng Shuiyuan . Improving source inversion performance of airborne pollutant emissions by modifying atmospheric dispersion scheme through sensitivity analysis combined with optimization model. . | Environmental pollution , 2021 , 284 , 117186 .
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Temporal and spatial characteristics of PM2.5 transport fluxes of typical inland and coastal cities in China. PubMed CSCD
期刊论文 | 2021 , 103 , 229-245 | Journal of environmental sciences
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Local pollution and the cross-boundary transmission of pollutants between cities have an inevitable impact on the atmosphere. Quantitative assessments of the contribution of transport to pollution in inland and coastal cities are necessary for the implementation of practical, regional, and joint emission control strategies. In this study, the Comprehensive Air Quality Model (CAMx), together with the Weather Research and Forecasting model (WRF), was used to simulate the contributions to pollution of different cities in 2016. The monthly inflow, outflow, and net flux from the ground to the extended layers served as the three main indicators for the analysis of the interactions of PM2.5 transport between adjacent cities. Between inland and coastal cities, the magnitude of inflow and outflow are larger in the former than in the latter. The inflow flux in the inland cities (Beijing and Shijiazhuang) was 10.6 and 10.7 kt/day, respectively, while that in the coastal cities (Tianjin, Shanghai, Hefei, Nanjing, and Hangzhou) was 9.1, 3.3, 5.8, 4.4, and 3.7 kt/day, respectively. In terms of variation over the year, the strongest inflow in the BTH region occurred in April, followed by October, July, and January, while that in the coastal cities in YRD occurred in January, followed by October, April, and July. Therefore, based on the flux intensity calculations and the transport flux pathways, effective joint control measures can be provided with scientific support, and a better understanding of the evolutionary mechanism among inland and coastal cities can be acquired.

Keyword :

modeling system modeling system regional transport regional transport coastal cities coastal cities PM(2.5) flux PM(2.5) flux inland cities inland cities

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GB/T 7714 Guan Panbo , Wang Xiaoqi , Cheng Shuiyuan et al. Temporal and spatial characteristics of PM2.5 transport fluxes of typical inland and coastal cities in China. [J]. | Journal of environmental sciences , 2021 , 103 : 229-245 .
MLA Guan Panbo et al. "Temporal and spatial characteristics of PM2.5 transport fluxes of typical inland and coastal cities in China." . | Journal of environmental sciences 103 (2021) : 229-245 .
APA Guan Panbo , Wang Xiaoqi , Cheng Shuiyuan , Zhang Hanyu . Temporal and spatial characteristics of PM2.5 transport fluxes of typical inland and coastal cities in China. . | Journal of environmental sciences , 2021 , 103 , 229-245 .
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Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements SCIE
期刊论文 | 2021 , 253 | ATMOSPHERIC ENVIRONMENT
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A significant technique of combining simulation experiments with a long-term real-time field measurement was first deployed to explore impacts of various environmental factors on formations of sulfate aerosol on the surface of mineral aerosols as MgO in the different reaction systems, and synergistic impacts of these environmental factors on the formation of sulfate aerosols in the different seasonal systems, especially in haze days. Meanwhile, a new correction technique was developed to estimate the effective reaction area and initial uptake coefficient of SO2 on the MgO aerosol surfaces. The significant results showed that the reactions of SO2 on the MgO aerosol surfaces in the system of SO2-MgO-dark could produce a small amount of sulfate and a large amount of sulfite and bisulfite, while in the systems of SO2-MgO-h? and SO2-MgO-O3 produce a large amount of sulfate and a small amount of sulfite and bisulfite. The impacts of temperature T and relative humidity RH on the sulfate formation on MgO aerosol surfaces showed a single-peak mode under the UV light condition, respectively. The sensitivities of these environmental factors to the sulfate aerosol formation were found to follow the order of RH > UV >T > O3 > SO2. The revised initial uptake coefficient ?0.REV of SO2 on the MgO aerosols was always between ?0.BET and ?0.GEO, and much closer to actual value. The heterogeneous reaction mechanisms of SO2 on the MgO aerosol surfaces in the different reaction systems were obviously different. In the presence of water, light irradiation and O3 exerted crucially significant roles in promoting sulfate heterogeneous formation. The various environmental factors in the different seasonal systems, especially in haze days, showed different synergistic effects on sulfate aerosol formations. The sulfate aerosol formations in haze days were mostly impacted by RH, T, O3, and SO2 in spring, RH in summer, RH, T, and SO2 in autumn, and RH and SO2 in winter. The study will provide significant scientific bases for understanding and controlling haze pollution formation.

Keyword :

Uptake coefficient Uptake coefficient Synergistic effect Synergistic effect Sensitive factors Sensitive factors Mineral aerosol Mineral aerosol Sulfate aerosol Sulfate aerosol Haze days Haze days

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GB/T 7714 Han, Lihui , Liu, Xinhang , Chen, Yuanyuan et al. Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements [J]. | ATMOSPHERIC ENVIRONMENT , 2021 , 253 .
MLA Han, Lihui et al. "Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements" . | ATMOSPHERIC ENVIRONMENT 253 (2021) .
APA Han, Lihui , Liu, Xinhang , Chen, Yuanyuan , Xiang, Xin , Cheng, Shuiyuan , Wang, Haiyan . Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements . | ATMOSPHERIC ENVIRONMENT , 2021 , 253 .
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