Results 1 to 10 of about 193,411 (276)

Dramatic changes in atmospheric pollution source contributions for a coastal megacity in northern China from 2011 to 2020 [PDF]

Atmospheric Chemistry and Physics, 2022
Understanding the effectiveness of long-term air pollution regulatory measures is important for control policy formulation. Efforts have been made using chemical transport modelling and statistical approaches to evaluate the efficacy of the Clean Air ...
B. Liu, B. Liu, Y. Wang, Y. Wang, H. Meng, Q. Dai, Q. Dai, L. Diao, L. Diao, J. Wu, J. Wu, L. Shi, J. Wang, Y. Zhang, Y. Zhang, Y. Feng, Y. Feng   +16 more
doaj   +1 more source

Global review of source apportionment of volatile organic compounds based on highly time-resolved data from 2015 to 2021

Environment International, 2022
Highly time-resolved data for volatile organic compounds (VOCs) can now be monitored. Source analyses of such high time-resolved concentrations provides key information for controlling VOC emissions.
Yang Yang, Baoshuang Liu, Jing Hua, Tao Yang, Qili Dai, Jianhui Wu, Yinchang Feng, Philip K. Hopke   +7 more
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Effect of photochemical losses of ambient volatile organic compounds on their source apportionment

Environment International, 2023
Photochemical losses of ambient volatile organic compounds (VOCs) substantially affect source apportionment analysis. Hourly speciated VOC data measured from April to August 2020 in Tianjin, China were used to analyze the photochemical losses of VOC ...
Baoshuang Liu, Yang Yang, Tao Yang, Qili Dai, Yufen Zhang, Yinchang Feng, Philip K. Hopke   +6 more
doaj   +1 more source

Quantitative evidence from VOCs source apportionment reveals O3 control strategies in northern and southern China

Environment International, 2023
Ground-level ozone (O3) pollution has received widespread attention because its rising trend and adverse ecological impacts. However, the extremely strong photochemical reactions of its precursor volatile organic compounds (VOCs) increase the difficulty ...
Zhenyu Wang, Xiao Tian, Jie Li, Feng Wang, Weiqing Liang, Huan Zhao, Bo Huang, Zaihua Wang, Yinchang Feng, Guoliang Shi   +9 more
doaj   +1 more source

Multiply improved positive matrix factorization for source apportionment of volatile organic compounds during the COVID-19 shutdown in Tianjin, China

Environment International, 2022
Ambient concentrations of volatile organic compounds (VOCs) vary with emission rates, meteorology, and chemistry. Conventional positive matrix factorization (PMF) loses information because of dilution variations and chemical losses. Multiply improved PMF
Yao Gu, Baoshuang Liu, Qili Dai, Yufen Zhang, Ming Zhou, Yinchang Feng, Philip K. Hopke   +6 more
doaj   +1 more source

Carbon emission reductions, pricing and social welfare of three-echelon supply chain considering consumer environmental awareness under carbon tax policy

Frontiers in Environmental Science, 2022
With the rapid growth in carbon emissions from transport, reducing these emissions is becoming as important as reducing emissions from production. We took a transporter as a member of the supply chain system and constructed a three-echelon supply chain ...
Yunfeng Zhang, Ying Qin
doaj   +1 more source

Review of source analyses of ambient volatile organic compounds considering reactive losses: methods of reducing loss effects, impacts of losses, and sources [PDF]

Atmospheric Chemistry and Physics
Chemical losses of ambient reactive volatile organic compounds (VOCs) is a long-term issue yet to be resolved in VOC source apportionments. These losses substantially reduce the concentrations of highly reactive species in the apportioned factor profiles
B. Liu, B. Liu, Y. Gu, Y. Gu, Y. Wu, Y. Wu, Q. Dai, Q. Dai, S. Song, S. Song, Y. Feng, Y. Feng, P. K. Hopke, P. K. Hopke   +13 more
doaj   +1 more source

Non-Cooperative Game and Cooperative Operation of Multi-Level Supply Chain Under Background of Carbon Emission Reduction

IEEE Access, 2022
In the context of global efforts to develop low-carbon economy and curb the growth of fossil energy, it is particularly important for supply chain enterprises to make scientific decisions on emission reduction and energy conservation.
Dong Chen, Yu Zhang, Xing Hong, Qi-Feng Chen, Jing Zhang   +4 more
doaj   +1 more source

Trading mechanism for day-ahead power generation rights considering carbon emission rights and allowance benefits [PDF]

E3S Web of Conferences, 2022
To improve the enthusiasm of captive power plants to participate in power generation rights trading, this paper proposes a method of power generation rights trading for captive power plants and wind power before the day considering carbon emission rights
Wang Lina, Liu Wenxia
doaj   +1 more source

Optimal emission control under public port rivalry: A comparison of competitive and cooperative policy

Maritime Transport Research, 2020
This study examines the optimal emission control at two competing public ports. We first develop a two-stage duopoly model in which governments determine the emission standard that restrains shipping operators’ fuel quality and ports are involved in ...
Kevin Hyosoo Park, Young-Tae Chang, Jasmine Siu Lee Lam   +2 more
doaj   +1 more source