A5038730139- Atmospheric chemistry and aerosols
- Piezoelectric Actuators and Control
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Soft Robotics and Applications
- Air Quality Monitoring and Forecasting
- Iterative Learning Control Systems
- Atmospheric and Environmental Gas Dynamics
- Advanced MEMS and NEMS Technologies
- Innovative Energy Harvesting Technologies
- Aeroelasticity and Vibration Control
- Micro and Nano Robotics
- Vibration and Dynamic Analysis
- Advanced Sensor and Control Systems
- Industrial Technology and Control Systems
- Magnetic Bearings and Levitation Dynamics
- Advanced Algorithms and Applications
- Advanced Computational Techniques and Applications
- Fungal Biology and Applications
- Microfluidic and Bio-sensing Technologies
- Acoustic Wave Resonator Technologies
- Adhesion, Friction, and Surface Interactions
- Meteorological Phenomena and Simulations
- Remote Sensing and Land Use
Peking University
2016-2025
Northeast Institute of Geography and Agroecology
2003-2025
Chinese Academy of Sciences
2003-2025
Universiti Sains Malaysia
2025
Nanjing University of Aeronautics and Astronautics
2013-2024
Ningbo University
2024
Ningbo Institute of Industrial Technology
2024
Changzhou University
2023-2024
China Automotive Technology and Research Center
2024
Center for Drug Evaluation and Research
2015-2023
Abstract. Mobility particle size spectrometers often referred to as DMPS (Differential Particle Sizers) or SMPS (Scanning have found a wide range of applications in atmospheric aerosol research. However, comparability measurements conducted world-wide is hampered by lack generally accepted technical standards and guidelines with respect the instrumental set-up, measurement mode, data evaluation well quality control. Technical were developed for minimum requirement mobility spectrometry...
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...
Abstract. Frequent low visibility, haze and fog events were found in the North China Plain (NCP). Data throughout NCP during past 30 years examined to determine horizontal distribution decadal trends of events. The impact meteorological factors such as wind relative humidity (RH) on those was investigated. Results reveal distinct distributions days, due their different formation mechanisms. Low days all display increasing before 1995, a steady stage period 1995–2003 drastically drop...
Abstract. As has been the case in North America and western Europe, SO2 emissions have substantially reduced China Plain (NCP) recent years. Differential rates of reduction NOx concentrations result frequent occurrence particulate matter pollution dominated by nitrate (pNO3-) over NCP. In this study, we observed a polluted episode with mass fraction nonrefractory PM1 (NR-PM1) being up to 44 % during wintertime Beijing. Based on typical pNO3--dominated haze event, linkage between aerosol...
In this study, observed precipitation, MODIS data and meteorological sounding over eastern central China were analyzed. The result shows that the precipitation in region is significantly reduced during last 40 years reduction of strongly correlated to high concentrations aerosols. Meteorological indicates atmospheric stability troposphere has been increasing 17 years. It speculated aerosol layer lower affects radiative processes, which lead changes stability. enhancement tends depress upward...
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. We analyze summertime photochemistry near the surface in Beijing, China, using a 1-D photochemical model (Regional chEmical and trAnsport Model, REAM-1D) constrained by situ observations, focusing on budgets of ROx (OH + HO2 RO2) radicals O3 formation. While modeling analysis focuses near-surface budgets, implications for budget planetary boundary layer are also discussed. In terms daytime average, total primary production rate Beijing is 6.6 ppbv per hour (ppbv h−1, among highest...
In this paper, the three‐dimensional distribution of air pollutants in Beijing region using aircraft measurements is reported, and Mountain Chimney Effect (MCE) on studied. A remarkable two‐pollution‐layer structure was observed by measurement 18 August 2007. Gaseous particle were well mixed with high concentrations planetary boundary layer. There an elevated pollution layer (EPL) at altitude 2500–3500 m, comparable that Analysis indicates two layers originated from same source. On basis...
Abstract. Hygroscopic growth of aerosol particles is significant importance in quantifying the radiative effect atmosphere. In this study, hygroscopic properties ambient are investigated based on particle chemical composition at a suburban site North China Plain during HaChi campaign (Haze China) summer 2009. The size-segregated particulate mass concentration as well components such inorganic ions, organic carbon and water-soluble (WSOC) identified from samples collected with ten-stage...
Abstract. Water can be a major component of aerosol particles, also serving as medium for aqueous-phase reactions. In this study, novel method is presented to calculate the liquid water content at high relative humidity based on measurements hygroscopic growth factor, particle number size distribution and in Haze China (HaChi) summer field campaign (July–August 2009) North Plain. The calculated using agreed well with that thermodynamic equilibrium model (ISORROPIA II) (>60%) correlation...
Abstract A 44-yr climatology of spring Asian dust aerosol emission, column loading, deposition, trans-Pacific transport routes, and budgets during 1960–2003 was simulated with the Northern Aerosol Regional Climate Model (NARCM). Interannual variability in these properties by model its climate connections are analyzed major climatic indices records ground observations. For production from most source regions, strongest correlations were surface wind speed region area intensity polar vortex...
Transcriptional feedback loops are central to the architecture of eukaryotic circadian clocks. Models Arabidopsis thaliana clock have emphasized transcriptional repressors, but recently, Myb-like REVEILLE (RVE) transcription factors been established as activators components, including PSEUDO-RESPONSE REGULATOR5 (PRR5) and TIMING OF CAB EXPRESSION1 (TOC1). We show here that NIGHT LIGHT–INDUCIBLE AND CLOCK-REGULATED1 (LNK1) LNK2, members a small family four LNK proteins, dynamically interact...
A set of 152 vertical profiles aerosol number concentration and size distribution with diameter ranging from 0.12 to 3.0 μm observed by the airborne optical spectrometer probe in Beijing, China, between February 2005 September 2006 is analysed discussed. The statistic (Na) reveals a high density this region average surface level (N0) about 6600 cm-3 (0.12–3.0 μm). profile Na approximately satisfies an exponential decline function scale height 1419 m. are influenced structures planetary...
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...
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...
Abstract. Aerosol hygroscopicity is crucial for understanding roles of aerosol particles in atmospheric chemistry and climate effects. Light-scattering enhancement factor f(RH, λ) one the parameters describing hygroscopicity, which defined as = σsp(RH, λ)∕σsp(dry, λ), where or σsp(dry, represents σsp at wavelength λ under certain relative humidity (RH) dry conditions. Traditionally, an overall parameter κ can be retrieved from measured hereinafter referred to κf(RH), by combining...