4.8 Article

Vehicular Ammonia Emissions Significantly Contribute to Urban PM2.5 Pollution in Two Chinese Megacities

Related references

Note: Only part of the references are listed.
Article Engineering, Environmental

Vehicular Emissions Enhanced Ammonia Concentrations in Winter Mornings: Insights from Diurnal Nitrogen Isotopic Signatures

Mengna Gu et al.

Summary: NH3 concentrations in winter mornings in urban Beijing are enhanced by vehicle emissions, which is a common phenomenon with significant diurnal variations.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Multidisciplinary Sciences

Exploring global changes in agricultural ammonia emissions and their contribution to nitrogen deposition since 1980

Lei Liu et al.

Summary: Global agricultural ammonia emissions have increased significantly in the past four decades, with cropland and livestock emissions playing a major role. Wheat, maize, rice, cattle, chicken, goats, and pigs are identified as the main contributors to ammonia emissions. The lack of regulations on ammonia emissions has led to increased reduced nitrogen deposition, particularly in hotspot regions such as China, India, and the United States, where nitrogen overuse is prevalent. Reducing agricultural ammonia emissions is crucial for future efforts to reduce nitrogen deposition.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2022)

Article Environmental Sciences

Characterizing start emissions of gasoline vehicles and the seasonal, diurnal and spatial variabilities in China

Yifan Wen et al.

Summary: This study focused on measuring start emissions of gaseous pollutants and solid particle number from gasoline light-duty passenger vehicles in China, with a particular emphasis on the impact of cold-start conditions. The results showed that cold-start phase contributes significantly to total tailpipe emissions, and that emissions vary by pollutant, vehicle technology, and environmental conditions. The study also revealed seasonal, diurnal, and spatial variabilities in LDPV emissions, providing valuable insights for emission inventory and air quality simulation improvements.

ATMOSPHERIC ENVIRONMENT (2021)

Article Environmental Sciences

The nonlinear response of fine particulate matter pollution to ammonia emission reductions in North China

Zehui Liu et al.

Summary: Recent Chinese air pollution actions have significantly lowered PM2.5 levels in North China through controlling SO2 and NOx emissions, but unregulated NH3 emissions pose a challenge. Reductions in NH3 emissions can greatly mitigate PM2.5 pollution. NH3 emission control should be considered in conjunction with SO2 and NOx emission controls when designing strategies to mitigate PM2.5 pollution.

ENVIRONMENTAL RESEARCH LETTERS (2021)

Article Environmental Sciences

Improved soil-crop system management aids in NH3 emission mitigation in China

Zhipeng Sha et al.

Summary: The study identifies effective measures to reduce high ammonia emissions from fertilized soil in China, such as manipulating crop density, changing irrigation regimes, and using slow-release fertilizers. These measures can help establish a comprehensive NH3 mitigation framework, provide potential solutions, and contribute to food security and environmental sustainability.

ENVIRONMENTAL POLLUTION (2021)

Article Multidisciplinary Sciences

Abating ammonia is more cost-effective than nitrogen oxides for mitigating PM2.5 air pollution

Baojing Gu et al.

Summary: The study shows that nitrogen contributes significantly to global PM2.5 exposure and has a substantial impact on global health. Controlling ammonia emissions has a lower cost compared to nitrogen oxides emissions, emphasizing the priority for reducing ammonia emissions.

SCIENCE (2021)

Article Geosciences, Multidisciplinary

Control of particulate nitrate air pollution in China

Shixian Zhai et al.

Summary: The concentration of fine particulate matter (PM2.5) in China decreased by 30-50% from 2013 to 2018 due to emission controls, but the nitrate component did not decrease effectively. Increased particulate nitrate concentration during winter haze pollution events is attributed to the particulate fraction transitioning from gaseous nitric acid. Reducing ammonia emissions is suggested as an effective method to decrease the nitrate component of fine particulate matter pollution in the North China Plain.

NATURE GEOSCIENCE (2021)

Article Engineering, Environmental

Tracking Air Pollution in China: Near Real-Time PM2.5 Retrievals from Multisource Data Fusion

Guannan Geng et al.

Summary: The study introduces a near real-time air pollutant database named Tracking Air Pollution in China (TAP), which combines ground observations, satellite AOD, and other data sources to provide daily 10 km resolution PM2.5 data. The database utilizes a two-stage machine learning model to estimate PM2.5 concentrations, improving performance at high pollution levels and filling gaps in AOD data. The availability of daily PM2.5 data for tracking changes over time and long-term records since 2000 will support policy assessments and health impact studies.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Geosciences, Multidisciplinary

Drivers of PM2.5 air pollution deaths in China 2002-2017

Guannan Geng et al.

Summary: The study found that emission controls avoided approximately 870,000 deaths in China between 2002 and 2017, but further improvements in air quality require energy-climate policies and changes in economic structure. Analysis showed that end-of-pipe control policies significantly reduced PM2.5-related deaths in China, with mandated emission control technologies avoiding nearly three-quarters of the deaths that would have occurred due to increased economic activity.

NATURE GEOSCIENCE (2021)

Article Green & Sustainable Science & Technology

Alternative-energy-vehicles deployment delivers climate, air quality, and health co-benefits when coupled with decarbonizing power generation in China

Liqun Peng et al.

Summary: The use of alternative energy vehicles can reduce air pollution and related premature mortality, but rapid decarbonization of the power system is needed to maximize the benefits.

ONE EARTH (2021)

Article Environmental Sciences

Emission inventory of air pollutants and chemical speciation for specific anthropogenic sources based on local measurements in the Yangtze River Delta region, China

Jingyu An et al.

Summary: This study updated a high-resolution air pollutant emission inventory for the Yangtze River Delta region in 2017, showing that coal-fired boilers were the main sources of SO2 and CO, mobile sources dominated NOx emissions, industrial sources were the main contributors to NMVOC emissions, agriculture was the main source of NH3 emissions, and dust sources were the major contributors to PM10 and PM2.5 emissions.

ATMOSPHERIC CHEMISTRY AND PHYSICS (2021)

Article Environmental Sciences

Trends in ammonia emissions from light-duty gasoline vehicles in China, 1999-2017

Shengyue Li et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2020)

Article Multidisciplinary Sciences

Stronger policy required to substantially reduce deaths from PM2.5 pollution in China

Huanbi Yue et al.

NATURE COMMUNICATIONS (2020)

Article Environmental Sciences

On-road emission measurements of reactive nitrogen compounds from heavy-duty diesel trucks in China

Liqiang He et al.

ENVIRONMENTAL POLLUTION (2020)

Article Multidisciplinary Sciences

Multiphase buffer theory explains contrasts in atmospheric aerosol acidity

Guangjie Zheng et al.

SCIENCE (2020)

Article Engineering, Environmental

Underestimated Ammonia Emissions from Road Vehicles

Naomi J. Farren et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

Article Multidisciplinary Sciences

The quest for improved air quality may push China to continue its CO2 reduction beyond the Paris Commitment

Jia Xing et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2020)

Article Geosciences, Multidisciplinary

Stabilization of atmospheric nitrogen deposition in China over the past decade

Guirui Yu et al.

NATURE GEOSCIENCE (2019)

Article Multidisciplinary Sciences

Ammonia emission control in China would mitigate haze pollution and nitrogen deposition, but worsen acid rain

Mingxu Liu et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2019)

Article Multidisciplinary Sciences

Drivers of improved PM2.5 air quality in China from 2013 to 2017

Qiang Zhang et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2019)

Article Engineering, Environmental

Assessing Contributions of Agricultural and Nonagricultural Emissions to Atmospheric Ammonia in a Chinese Megacity

Yunhua Chang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

Article Environmental Sciences

High-resolution mapping of vehicle emissions of atmospheric pollutants based on large-scale, real-world traffic datasets

Daoyuan Yang et al.

ATMOSPHERIC CHEMISTRY AND PHYSICS (2019)

Article Green & Sustainable Science & Technology

Air quality and health benefits from fleet electrification in China

Xinyu Liang et al.

NATURE SUSTAINABILITY (2019)

Article Engineering, Environmental

Ammonia Emission Measurements for Light-Duty Gasoline Vehicles in China and Implications for Emission Modeling

Cheng Huang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2018)

Article Engineering, Environmental

Vehicle Emissions as an Important Urban Ammonia Source in the United States and China

Kang Sun et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2017)

Article Geosciences, Multidisciplinary

Lower vehicular primary emissions of NO2 in Europe than assumed in policy projections

Stuart K. Grange et al.

NATURE GEOSCIENCE (2017)

Review Environmental Sciences

On-road vehicle emissions and their control in China: A review and outlook

Ye Wu et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2017)

Article Environmental Sciences

The importance of vehicle emissions as a source of atmospheric ammonia in the megacity of Shanghai

Yunhua Chang et al.

ATMOSPHERIC CHEMISTRY AND PHYSICS (2016)

Article Multidisciplinary Sciences

Enhanced nitrogen deposition over China

Xuejun Liu et al.

NATURE (2013)

Article Engineering, Environmental

Impact Assessment of Ammonia Emissions on Inorganic Aerosols in East China Using Response Surface Modeling Technique

Shuxiao Wang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2011)