A5091185784- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- Vehicle emissions and performance
- Wastewater Treatment and Nitrogen Removal
- Physical Unclonable Functions (PUFs) and Hardware Security
- Oil Spill Detection and Mitigation
- Chemical Thermodynamics and Molecular Structure
- Radiation Effects in Electronics
- Plant responses to elevated CO2
- Electrostatic Discharge in Electronics
China Meteorological Administration
2018-2025
Jilin Weather Modification Office
2008-2015
Beijing Institute of Water
2013
Beijing Meteorological Bureau
2011
Research Center for Eco-Environmental Sciences
2007-2008
Chinese Academy of Sciences
2007
Abstract. Size-resolved and bulk activation properties of aerosols were measured at a regional/suburban site in the North China Plain (NCP), which is occasionally heavily polluted by anthropogenic aerosol particles gases. A Cloud Condensation Nuclei (CCN) closure study conducted with CCN number concentration (NCCN) calculated based on size distribution size-resolved properties. The observed (NCCN-obs) are higher than those other locations China, average NCCN-obs roughly 2000, 3000, 6000, 10...
Hydrogen peroxide (H2O2) plays a key role in atmospheric chemistry, but knowledge of its variation, sources, and impact on sulfate formation remains incomplete, especially the urban boundary layer aloft. Here, we conducted field campaign with measurements H2O2 related species at tower-based site (∼528 m above ground surface) Beijing spring 2022. The observed hourly concentration reached up to 21.2 ppbv an average value 3.4 ± 3.7 during entire observation period, which was higher than values...
Abstract. Under a high atmospheric oxidization capacity, the synergistic effect of physicochemical processes in boundary layer (ABL) caused summer haze pollution Beijing. The southern and southwestern areas, generally 60–300 km away from Beijing, were seriously polluted contrast to which remained clean. Southerly winds moving faster than 20–30 h−1 since early morning primarily initiation. PM2.5 (particulate matter with dynamic equivalent diameter smaller 2.5 µm) level increased 75 µg m−3...
Abstract The heterogeneous hydrolysis of dinitrogen pentoxide (N 2 O 5 ) is an important pathway in nitrate formation; however, its formation rate and relative contribution to total particulate () are highly variable. Here we report that nocturnal via N dependent on the regime defined by ratio NO 3 . Nocturnal suppressed ‐limited but enhanced a regime. results have crucial implications for effective control pollution future. An exclusive decrease will may be less or even increase
The ambient concentrations of carbonyl compounds were measured in Waliguan (WLG) Observatory at the east edge Qinghai‐Tibetan August–September and December, 2005. average formaldehyde, acetaldehyde, acetone, 2‐butenal 4.16 ± 1.89, 4.25 3.32, 2.02 0.86, 1.93 1.58 ppbv ( n = 42), respectively, 1.48 0.42, 3.91 0.81, 1.88 0.69, 0.69 0.16 12), December. Biomass used as fuel for cooking by local residents was considered dominant source 2‐butenal. Photooxidation VOC (especially biogenic emission...
Abstract. Size-resolved and bulk activation properties of aerosols were measured at a regional/suburban site in the North China Plain (NCP), which is occasionally heavily polluted by anthropogenic aerosol particles gases. A CCN (Cloud Condensation Nuclei) closure study conducted with number concentration (NCCN) calculated NCCN based on size distribution size-resolved properties. The observed are higher than those other locations China, average roughly 2000, 3000, 6000, 10 000 13 cm−3...
<p indent=0mm>Severe haze events occur frequently in China, characterized by exceedingly high concentration of fine particulate matter (smaller than <sc>2.5 µm,</sc> or PM<sub>2.5</sub>). These extremes are caused synthetic physical-chemical processes, including emissions, chemical formation, planetary boundary layer regional circulation, weather and climate. processes multi-scales, ranging from nanometers to thousands kilometers. The complex interplays among these make it more difficult...
Strong upwards transport of Nitrous acid (HONO) in daytime over the urban area Beijing was observed based on combined observations HONO, NOx (NO and NO2), nitrate, PM2.5, at two heights (90 m 528 m) a high building (528 above ground) planetary boundary layer (PBL). A clear different diurnal variation HONO between layers observed. 90 showed peaks morning rush hour mid-night, but with low concentration daytime, which similar as ground level; while decreasing trend significantly weakened layer....
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Abstract. Under strong atmospheric oxidization capacity, haze pollution in the summer of Beijing was result synergistic effect physicochemical process boundary layer (ABL). The south/southwest areas generally ~ 60–300 km far away from were seriously polluted, contrast to a clean situation Beijing. southerly winds moving more than 20–30 h−1 since early morning primarily caused initiation pollution. PM2.5 level increased 75 μg m−3 several hours at daytime, which simultaneously affected by ABL...
Abstract. Ozone (O3) in the upper troposphere and lower stratosphere (UTLS) is strongly regulated by upper-level circulation dynamics. Understanding coupling between UTLS O3 distribution dynamics important not only to understand synoptic processes governing variability, but also test fidelity of chemistry transport models simulating stratosphere–troposphere exchange (STE) processes. This study presents first systematic assessment observationally constrained variability associated with...