A5000320455- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Vehicle emissions and performance
- Toxic Organic Pollutants Impact
- Atmospheric and Environmental Gas Dynamics
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Indoor Air Quality and Microbial Exposure
- Gas Sensing Nanomaterials and Sensors
- Climate Change and Health Impacts
- Energy and Environment Impacts
- Geology and Paleoclimatology Research
- Heavy metals in environment
- COVID-19 impact on air quality
- Aeolian processes and effects
- Fire effects on ecosystems
- Soil Carbon and Nitrogen Dynamics
- Impact of Light on Environment and Health
- Catalysis and Oxidation Reactions
- Radioactivity and Radon Measurements
- Mercury impact and mitigation studies
- Conservation Techniques and Studies
Institute of Atmospheric Physics
2020-2025
Chinese Academy of Sciences
2016-2025
Xi'an Jiaotong University
2015-2025
Institute of Earth Environment
2016-2025
Research Center for Eco-Environmental Sciences
2025
Shanxi Medical University
2025
Chinese Academy of Medical Sciences & Peking Union Medical College
2025
Beijing Hospital
2025
University of Chinese Academy of Sciences
2020-2024
Hubei University of Automotive Technology
2024
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...
Hand washing and maintaining social distance are the main measures recommended by World Health Organization (WHO) to avoid contracting COVID-19. Unfortunately, these measured do not prevent infection inhalation of small droplets exhaled an infected person that can travel meters or tens in air carry their viral content. Science explains mechanisms such transport there is evidence this a significant route indoor environments. Despite this, no countries authorities consider airborne spread...
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...
Simultaneous measurements of atmospheric organic and elemental carbon (OC EC) were taken during winter summer seasons at 2003 in 14 cities China. Daily PM 2.5 samples analyzed for OC EC by the Interagency Monitoring Protected Visual Environments (IMPROVE) thermal/optical reflectance protocol. Average concentrations 38.1 μ g m −3 13.8 periods, corresponding 9.9 3.6 , respectively. had minima maxima all cities. Carbonaceous matter (CM), sum (OM = 1.6 × OC) EC, contributed 44.2% to 38.8%...
We find evidence that black soot aerosols deposited on Tibetan glaciers have been a significant contributing factor to observed rapid glacier retreat. Reduced emissions, in addition reduced greenhouse gases, may be required avoid demise of Himalayan and retain the benefits for seasonal fresh water supplies.
Abstract. Continuous measurements of atmospheric organic and elemental carbon (OC EC) were taken during the high-pollution fall winter seasons at Xi'an, Shaanxi Province, China from September 2003 through February 2004. Battery-powered mini-volume samplers collected PM2.5 samples daily PM10 every third day. Samples also obtained plumes residential coal combustion, motor-vehicle exhaust, biomass burning sources. These analyzed for OC/EC by thermal/optical reflectance (TOR) following...
We use numerical climate simulations, paleoclimate data, and modern observations to study the effect of growing ice melt from Antarctica Greenland. Meltwater tends stabilize ocean column, inducing amplifying feedbacks that increase subsurface warming shelf melting. Cold meltwater induced dynamical effects cause surface cooling in Southern Ocean North Atlantic, thus increasing Earth's energy imbalance heat flux into most global ocean's surface. cooling, while lower latitudes are warming,...
Although ambient fine particulate matter (PM(2.5); ≤ 2.5 µm in aerodynamic diameter) has been linked to adverse human health effects, the chemical constituents that cause harm are unknown. To our knowledge, effects of PM(2.5) have not reported for a developing country.We examined short-term association between and daily mortality Xi'an, heavily polluted Chinese city.We obtained data concentrations PM(2.5), organic carbon (OC), elemental (EC), 10 water-soluble ions 1 January 2004 through 31...
China has been experiencing fine particle (i.e., aerodynamic diameters ≤ 2.5 µm; PM2.5) pollution and acid rain in recent decades, which exert adverse impacts on human health the ecosystem. Recently, ammonia NH3) emission reduction proposed as a strategic option to mitigate haze pollution. However, atmospheric NH3 is also closely bound nitrogen deposition rain, comprehensive of control are still poorly understood China. In this study, by integrating chemical transport model with...
Abstract. During winter 2013–2014 aerosol mass spectrometer (AMS) measurements were conducted for the first time with a novel PM2.5 (particulate matter aerodynamic diameter ≤ 2.5 µm) lens in two major cities of China: Xi'an and Beijing. We denote periods visibility below 2 km as extreme haze refer to rest reference periods. an covered city about week total non-refractory (NR)-PM2.5 fraction reached peak concentrations over 1000 µg m−3. Beijing events occurred, but temporal extent during...
Abstract. Daily PM2.5 (aerosol particles with an aerodynamic diameter of less than 2.5 μm) samples were collected at urban site in Chengdu, inland megacity southwest China, during four 1-month periods 2011, each period a different season. Samples subject to chemical analysis for various components ranging from major water-soluble ions, organic carbon (OC), element (EC), trace elements biomass burning tracers, anhydrosugar levoglucosan (LG), and mannosan (MN). Two models, the ISORROPIA II...
Organic aerosols were studied at the molecular level in 14 coastal and inland mega-cities China during winter summer 2003. They are characterized by abundant presence of n-alkanes (annual average, 340 ng m-3), fatty acids (769 sugars (412 phthalates (387 m-3). In contrast, alcohols, polyols/polyacids, lignin resin products, sterols, polycyclic aromatic hydrocarbons (PAHs), hopanes detected as relatively minor components. n-Alkanes show a weak odd/even carbon predominance (CPI = 1.1) PAHs...
Fine particulate matter (PM2.5) is a growing public health concern especially in industrializing countries but existing monitoring networks are unable to properly characterize human exposures due low resolution spatiotemporal data. Low-cost portable monitors can supplement both developed and regions increase density of sites This study tests the performance low-cost sensor high concentration urban environments. Seven Portable University Washington Particle (PUWP) were calibrated with optical...
Nitrogen-induced suppression of lignin-modifying enzyme activity contributes to soil carbon sequestration.