A5069152279- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- Vehicle emissions and performance
- X-ray Diffraction in Crystallography
- Marine and coastal ecosystems
- Crystallization and Solubility Studies
- Meteorological Phenomena and Simulations
- Spectroscopy and Laser Applications
- Precipitation Measurement and Analysis
- Cryospheric studies and observations
- Microplastics and Plastic Pollution
- Flavonoids in Medical Research
- Environmental Policies and Emissions
- Magnetic and Electromagnetic Effects
- Nosocomial Infections in ICU
- Aeolian processes and effects
- Stellar, planetary, and galactic studies
- COVID-19 impact on air quality
- Environmental Quality and Pollution
- Astrophysics and Star Formation Studies
- Traditional Chinese Medicine Analysis
Sichuan University
2025
West China Hospital of Sichuan University
2025
Zunyi Medical University
2025
First People’s Hospital of Zunyi
2025
Institute of Atmospheric Physics
2015-2024
Chinese Academy of Sciences
2015-2024
Czech Academy of Sciences, Institute of Atmospheric Physics
2020
Peking University
2009-2015
Lithuanian Energy Institute
2015
Atmos (Czechia)
2015
Abstract. The hygroscopic properties of submicron aerosol particles were determined at a suburban site (Wuqing) in the North China Plain among cluster cities during period 17 July to 12 August, 2009. A High Humidity Tandem Differential Mobility Analyser (HH-TDMA) instrument was applied measure growth factor (GF) 90%, 95% and 98.5% relative humidity (RH) for with dry diameters between 50 250 nm. probability distribution GF (GF-PDF) averaged over shows distinct bimodal pattern, namely,...
Abstract. North China Plain (NCP) is one of the most densely populated regions in and has experienced enormous economic growth past decades. Its regional trace gas pollution also become top environmental concerns China. Measurements surface gases, including O3, NOx, SO2 CO were carried out within HaChi (Haze China) project at Wuqing Meteorology Station, located between 2 mega-cities (Beijing Tianjin) NCP, from 9 July 2009 to 21 January 2010. Detailed statistical analyses made order provide...
Ozone and its precursors were measured from 15 June 2006 to 14 2007 at an urban site in Shanghai used characterize photochemical oxidant production this region. During the observation period, ozone displays a seasonal variation with maximum spring. Observed nitrogen oxides (NOx) carbon monoxide (CO) reached winter minimum summer. NOx CO has similar double‐peak diurnal cycle, implying that they are largely of motor vehicle origin. Total nonmethane organic compounds (NMOC) concentrations...
Abstract. The largest uncertainty in the estimation of climate forcing stems from atmospheric aerosols. In early spring and summer 2009, two periods in-situ measurements on aerosol physical chemical properties were conducted within HaChi (Haze China) project at Wuqing, a town between Beijing Tianjin North China Plain (NCP). Aerosol optical properties, including scattering coefficient (σsp), hemispheric back (σbsp), absorption (σap), as well single albedo (ω), are presented. diurnal seasonal...
Abstract. Visibility degradation is a pervasive and urgent environmental problem in China. The occurrence of low visibility events frequent the North China Plain, where aerosol loading quite high aerosols are strongly hygroscopic. A parameterization light extinction (Kex) for visibilities on hazy days proposed this paper, based visibility, relative humidity (RH), hygroscopic growth factors particle number size distributions measured during Haze (HaChi) Project. Observational results show...
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...
Light-absorbing components of atmospheric aerosols have gained particular attention in recent years due to their climatic and environmental effects. Based on two-year measurements aerosol absorption at seven wavelengths, properties black carbon (BC) were investigated the North China Plain (NCP), one most densely populated polluted regions world. Aerosol was stronger fall heating season (from November March) than spring summer all wavelengths. Similar spectral dependence observed non-heating...
Abstract. Measurements of ozone and its precursors conducted within the HaChi (Haze in China) project summer 2009 were analyzed to characterize volatile organic compounds (VOCs) their effects on photochemical production at a suburban site North China Plain (NCP). Ozone episodes, during which running 8-h average concentrations exceeding 80 ppbv lasted for more than 4 h, occurred about two thirds observational days 5-week field campaign. This suggests continuous exposure risks this region...
Abstract. In this paper, the mixing state of light absorbing carbonaceous (LAC) was investigated with a two-parameter aerosol optical model and in situ measurements at regional site North China Plain (NCP). A closure study between hemispheric backscattering fraction (HBF) measured by an integrating nephelometer that calculated modified Mie conducted. new method proposed to retrieve ratio externally mixed LAC mass total (rext-LAC) based on assumption ambient particles were consisted pure...
Public health in India is gravely threatened by severe PM2.5 exposure. This study presents an analysis of long-term exposure four Indian megacities (Delhi, Chennai, Hyderabad and Mumbai) based on in-situ observations during 2015–2018, quantifies the risks short-term Diwali Fest (usually lasting for ~5 days October or November celebrating with lots fireworks) Delhi first time. The population-weighted annual-mean across cities was 72 μg/m3, ~3.5 times global level 20 μg/m3 1.8 annual criterion...
Abstract. Black carbon (BC) is a dominant absorber in the visible spectrum and potent factor climatic effects. Vertical profiles of BC were measured using micro-aethalometer attached to tethered balloon during Observations trace Gases Aerosols (VOGA) field campaign, summer 2014 at semirural site North China Plain (NCP). The diurnal cycle vertical distributions following evolution mixing layer (ML) was investigated for first time NCP region. Statistical parameters including identified height...
Quantify the influence of aerosol light extinction on surface ozone photochemistry, highlight controlling VOC for improving air quality in Delhi.
Abstract. Through several years of development, the city Lhasa has become one most populated and urbanized areas on highest plateau in world. In process urbanization, current potential air quality issues have been gradually concerned. To investigate status pollution Lhasa, various gas pollutants including NOx, CO, SO2, O3, were continuously measured from June 2012 to May 2013 at an urban site (29.40° N, 91.08° E, 3650 m a.s.l.). The seasonal variations primary exhibited a peak November...
Abstract. Characterizing vertical profiles of aerosol optical properties is important because relying on only the surface or column-integrated measurements cannot unambiguously constrain radiative impacts aerosol. This study presents series in situ measured multi-wavelength aerosols during three pollution events from November to December 2016 over Beijing region. For all events, clean periods (CPs) before initialization showed a higher scattering Ångström exponent (SAE) and smaller asymmetry...
Abstract. Precise quantification of the cloud condensation nuclei (CCN) number concentration is crucial for understanding aerosol indirect effects and characterizing these in models. An evaluation various methods CCN parameterization was carried out this paper based on situ measurements activation properties within HaChi (Haze China) project. Comparisons were made by closure studies between using spectra, bulk ratios, cut-off diameters size-resolved ratios. The estimation concentrations...
Abstract. Rapid economic growth has given rise to a significant increase in ozone precursor emissions many regions of China, especially the densely populated North China Plain (NCP) and Yangtze River Delta (YRD). Improved understanding formation response different is imperative address highly nonlinear problem provide solid scientific basis for efficient abatement these regions. A comparative study on photochemical production summer thus been carried out megacities Tianjin Shanghai Two...
Abstract. The heterogeneous hydrolysis of N2O5 on the surface deliquescent aerosol leads to HNO3 formation and acts as a major sink NOx in atmosphere during night-time. reaction constant this is determined by temperature (T), relative humidity (RH), particle composition, area concentration (S). However, these parameters were not comprehensively considered parameterization previous mass-based 3-D modelling studies. In investigation, we propose sophisticated (NewN2O5) with respect T, RH,...
Abstract. A phenomenon of frequent noontime SO2 concentration peaks was discovered in a detailed analysis the concentrations North China Plain (NCP). The possible causes and their contributions are analyzed. impacts such on sulphur cycle were studied implications for atmospheric chemistry, cloud physics, climate discussed. Different from more common diurnal patterns with high nighttime concentrations, NCP witnessed frequencies peaks, an occurrence frequency 50 to 72% at four stations. Down...
The mass loading and composition of atmospheric particles are important in determining their climate health effects, typically measured by filter sampling. However, particle sampling under ambient conditions can lead to a shift the size cut-off threshold induced hygroscopic growth, influence this on measurement has not been adequately quantified. Here, we propose method assess based κ-Köhler theory. A global perspective is presented previously reported annual climatological values...
Abstract. The North China Plain (NCP) has become one of the most polluted regions in China, with rapidly increasing economic growth past decades. High concentrations ambient O3 and aerosol have been observed at urban as well rural sites NCP. Most situ observations air pollutants conducted near ground so that current knowledge about vertical distributions tropospheric over NCP region is still limited. In this study, profiles size-resolved below 2.5 km were measured summer 2014 a site NCP,...
Abstract. Sea salt aerosol (SSA) is one of the major components primary aerosols and has significant impact on formation secondary inorganic particles mass a global scale. In this study, fully online coupled WRF-Chem model was utilized to evaluate SSA emission scheme its influence nitrate simulation in case study Europe during 10–20 September 2013. Meteorological conditions near surface, wind pattern thermal stratification structure were well reproduced by model. Nonetheless, coarse-mode...
Abstract. In situ measurements of vertically resolved particle size distributions based on a tethered balloon system were carried out for the first time in highland city Lhasa over Tibetan Plateau summer 2020, using portable optical counters range 0.124–32 µm. The vertical structure 112 aerosol profiles was found to be largely shaped by evolution planetary boundary layer (PBL), with nearly uniform distribution aerosols within daytime mixing and sharp decline height shallow nocturnal...