A5086052804- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Atmospheric and Environmental Gas Dynamics
- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Plant Water Relations and Carbon Dynamics
- Solar Radiation and Photovoltaics
- Climate variability and models
- Water Quality Monitoring and Analysis
- Soil and Unsaturated Flow
- Climate Change and Health Impacts
- Toxic Organic Pollutants Impact
- Soil and Water Nutrient Dynamics
- Environmental and Agricultural Sciences
- Plant responses to elevated CO2
- Water Quality and Pollution Assessment
- Advanced Chemical Sensor Technologies
- Heavy metals in environment
- Environmental Quality and Pollution
- Smart Materials for Construction
- Fire effects on ecosystems
Institute of Atmospheric Physics
2016-2025
Chinese Academy of Sciences
2016-2025
University of Chinese Academy of Sciences
2018-2025
Henan Normal University
2021-2024
Henan University of Engineering
2024
Zhengzhou University
2024
Binzhou University
2023
Binzhou Medical University
2023
Institute of Urban Environment
2017-2022
Nanjing University of Information Science and Technology
2014-2022
From 2013 to 2017, with the implementation of toughest-ever clean air policy in China, significant declines fine particle (PM2.5) concentrations occurred nationwide. Here we estimate drivers improved PM2.5 quality and associated health benefits China from 2017 based on a measure-specific integrated evaluation approach, which combines bottom-up emission inventory, chemical transport model, epidemiological exposure-response functions. The estimated national population-weighted annual mean...
Significance Exceedingly high levels of fine particulate matter (PM) occur frequently in China, but the mechanism severe haze formation remains unclear. From atmospheric measurements two Chinese megacities and laboratory experiments, we show that oxidation SO 2 by NO occurs efficiently aqueous media under polluted conditions: first, during 1952 London Fog via in-cloud oxidation; second, on PM with NH 3 neutralization China. We suggest effective mitigation is achievable intervening sulfate...
Haze in China has been increasing frequency of occurrence as well the area affected region. Here, we report on a new mechanism haze formation, which coexistence with NOx can reduce environmental capacity for SO2, leading to rapid conversion SO2 sulfate because NO2 and have synergistic effect when they react surface mineral dust. Monitoring data from five severe episodes January 2013 Beijing-Tianjin-Hebei regions agreed very laboratory simulation. The combined air pollution motor vehicle...
Although much attention has been paid to investigating and controlling air pollution in China, the trends of air-pollutant concentrations on a national scale have remained unclear. Here, we quantitatively investigated variation pollutants China using long-term comprehensive data sets from 2013 2017, during which Chinese government made major efforts reduce anthropogenic emission polluted regions. Our results show significant decreasing trend PM2.5 concentration heavily regions eastern with...
Abstract. The mixing layer is an important meteorological factor that affects air pollution. In this study, the atmospheric height (MLH) was observed in Beijing from July 2009 to December 2012 using a ceilometer. By comparison with radiosonde data, we found ceilometer underestimates MLH under conditions of neutral stratification caused by strong winds, whereas it overestimates when sand-dust crossing. Using meteorological, PM2.5, and PM10 observational screened automatically; observations...
The reduction of ammonia (NH3) emissions is urgently needed due to its role in aerosol nucleation and growth causing haze formation during conversion into ammonium (NH4+). However, the relative contributions individual NH3 sources are unclear, debate remains over whether agricultural dominate atmospheric urban areas. Based on chemical isotopic measurements size-resolved aerosols Beijing, China, we find that natural abundance 15N (expressed using δ15N values) NH4+ fine particles varies with...
Significance Regional haze adversely affects human health and possibly counteracts global warming by greenhouse gases, but its formation radiative forcing remain unclear. Here we present field measurements to show reduced frequency not severity for heavy little-improved moderate haze, when SO 2 is significantly in China. Our laboratory experiments identify black carbon (BC)-catalyzed sulfate involving NO NH 3 . Radiative transfer calculations accounting this BC chemistry indicate small net...
Abstract. The simultaneous observation and analysis of atmospheric fine particles (PM2.5) on a regional scale is an important approach to develop control strategies for haze pollution. In this study, samples filtered PM2.5 were collected simultaneously at three urban sites (Beijing, Tianjin, Shijiazhuang) background site (Xinglong) in the Beijing–Tianjin–Hebei (BTH) region from June 2014 April 2015. four was mainly comprised organic matter, secondary inorganic ions, mineral dust. Positive...
The limited availability of ammonia (NH3) measurements is currently a barrier to understanding the vital role NH3 in secondary aerosol formation during haze pollution events and prevents full assessment atmospheric deposition reactive nitrogen. observational gaps motivated us design this study investigate spatial distributions seasonal variations on national scale China. On basis 1-year campaign at 53 sites with uniform protocols, we confirm that abundant concentrations [1 23.9 μg m-3] were...
Abstract. The “Campaign on Atmospheric Aerosol Research” network of China (CARE-China) is a long-term project for the study spatio-temporal distributions physical aerosol characteristics as well chemical components and optical properties aerosols over China. This presents first data sets from this project, including 3 years observations online PM2.5 mass concentrations (2012–2014) 1 year compositions (2012–2013) CARE-China network. average concentration at 20 urban sites 73.2 µg m−3...
A general feature in the diurnal cycle of atmospheric ammonia (NH3) concentrations is a morning spike that typically occurs around 07:00 to 10:00 (LST). Current hypotheses explain this morning's NH3 increase remain elusive, and there still no consensus whether traffic emissions are among major sources urban NH3. Here, we confirmed pulse Beijing universal feature, with an annual occurrence frequency 73.0% rapid growth rate (>20%) winter. The stable nitrogen isotopic composition (δ15N–NH3)...