A5108053335- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Maritime Transport Emissions and Efficiency
- Atmospheric and Environmental Gas Dynamics
- Metabolism, Diabetes, and Cancer
- Toxic Organic Pollutants Impact
- Cancer, Stress, Anesthesia, and Immune Response
- Cancer, Lipids, and Metabolism
- Membrane Separation Technologies
- Per- and polyfluoroalkyl substances research
- Recycling and Waste Management Techniques
- Microplastics and Plastic Pollution
- Cryospheric studies and observations
- Water Quality Monitoring and Analysis
- Hydrology and Watershed Management Studies
- Environmental Changes in China
- Environmental and Agricultural Sciences
- Spectroscopy and Laser Applications
- Environmental Policies and Emissions
- Remote Sensing and Land Use
- Fire dynamics and safety research
Southern University of Science and Technology
2020-2025
Yunnan Normal University
2025
Everbright International (China)
2025
Early Warning (United States)
2025
Nanjing Agricultural University
2025
Fudan University
2013-2024
Shanghai Institute of Pollution Control and Ecological Security
2018-2024
Royal Belgian Institute for Space Aeronomy
2024
Guangzhou University
2024
Hohai University
2024
Atmospheric new particle formation (NPF) is an important global phenomenon that nevertheless sensitive to ambient conditions. According both observation and theoretical arguments, NPF usually requires a relatively high sulfuric acid (H2SO4) concentration promote the of particles low preexisting aerosol loading minimize sink particles. We investigated in Shanghai were able observe precursor vapors initial clusters at molecular level megacity. High rates observed coincide with several familiar...
The Yangtze River Delta (YRD) port cluster is one of five major clusters in China and home to Shanghai port, the largest worldwide. In this study, an automatic identification system-based model was built estimate ship exhaust emissions YRD East Sea within 400 km coastline. 2010, total SO2, NOX, PM2.5 were 3.8 × 105 tonnes/yr, 7.1 5.1 104 respectively. More than 60% 85% occurred 100 200 coastline, Ship also showed distinct seasonal variability. emission SO2 NOX by ships hot spots, such as...
Abstract. Particle size distributions in the range of 1.34–615 nm were recorded from 25 November 2013 to January 2014 urban Shanghai, using a combination one nano condensation nucleus counter system, scanning mobility particle sizer (SMPS), and long-SMPS. Measurements sulfur dioxide by an SO2 analyzer with pulsed UV fluorescence technique allowed calculation sulfuric acid proxy. In addition, concentrations ammonia differential optical absorption spectroscopy. During this 62-day campaign, 13...
The evaporative emissions of anthropogenic volatile organic compounds (AVOCs) are sensitive to ambient temperature. This sensitivity forms an air pollution-meteorology connection that has not been assessed on a regional scale. We parametrized the temperature dependence AVOC fluxes in quality model and evaluated impacts surface ozone Beijing–Tianjin–Hebei (BTH) area China during summer 2017. dependency drove enhanced simulated ozone-temperature 1.0 1.8 μg m–3 K–1, comparable driven by...
Shanghai has become an international shipping center in the world. In this study, multiyear measurements and high resolution air quality model with hourly ship emission inventory were combined to determine influence of emissions on urban Shanghai. The aerosol time-of-flight mass spectrometer (ATOFMS) carried out at site from April 2009 January 2013. During entire sampling time, most half-hourly averaged number fractions primary emitted particles varied between 1.0–10.0%. However, fraction...
High molecular weight (Mw) species were observed at substantial intensities in the positive-ion mass spectra urban Shanghai aerosols collected from a single-particle time-of-flight spectrometer (in m/z range 250−500) during three separate periods over 2007−2009. These correlate well with CN− signal, suggesting that C−N bonds are prevalent and high-Mw potentially nitrogen-containing organic salts. Anti-correlation ambient O3 concentration suggests photochemical oxidants not involved directly...
Abstract. A Single Particle Aerosol Mass Spectrometer (SPAMS), a Soot Photometer (SP2) and various meteorological instruments were employed to investigate the chemical physical properties of black carbon (BC) aerosols during regional air pollution episode in urban Shanghai over 5-day period December 2013. The refractory (rBC) mass concentrations measured by SP2 averaged 3.2 µg m−3, with peak value 12.1 m−3 at 04:26 LT on 7 December. number BC-containing particles captured SPAMS size range...
Nitrite (NO2–) and its conjugate acid, nitrous acid (HNO2), have long been recognized as a ubiquitous atmospheric pollutant well an important photochemical source of hydroxyl radicals (·OH) reactive nitrogen species (·NO, ·NO2, ·N2O3, etc.) in both the gas phase aqueous phase. Although NO2–/HNO2 plays role chemistry, our understanding on chemical evolution organic components waters is rather incomplete still dispute. In this study, nitrite-mediated photooxidation vanillin (VL), phenolic...
Levoglucosan has been widely used to quantitatively assess biomass burning's contribution ambient aerosols, but previous such assessments have not accounted for levoglucosan's degradation in the atmosphere. We develop first global simulation of atmospheric levoglucosan, explicitly accounting its chemical degradation, evaluate impacts on use quantitative aerosol source apportionment. is emitted into atmosphere from burning plant matter open fires (1.7 Tg yr–1) and as biofuels (2.1 yr–1)....
We developed a regional atmospheric transport model for microplastics (MPs, 10 μm to 5 mm in size) over Asia and the adjacent Pacific Indian oceans, accounting MPs' size- shape-dependent aerodynamics. The was driven by tuned emissions of MPs from land ocean, simulations were evaluated against coastal (n = 19) marine 56) observations. Our oceans 310 Gg y–1 (1 1 kton) 60 y–1, respectively. MP lines fragments may be transported atmosphere >1000 km; pellets our mostly deposited near-source....
Effective mitigation of surface ozone pollution entails detailed knowledge the contributing precursors' sources. We use GEOS-Chem adjoint model to analyze precursors in Beijing–Tianjin–Hebei area (BTH) China on days different severities June 2019. find that BTH heavily polluted is sensitive local emissions, as well emitted from provinces south (Shandong, Henan, and Jiangsu, collectively SHJ area). Heavy can be mitigated effectively by reducing NOx (from industrial processes transportation),...
Atmospheric black carbon (BC) has a large yet highly uncertain contribution to global warming. When mixed with non-BC/coating material during atmospheric aging, the BC light absorption can be enhanced through lensing effect. Laboratory and modeling studies have consistently found strong enhancement, while results in ambient measurements are conflicting, some reporting weak enhancement even for particles bulk coating amounts. Here, from our direct field observations, we report both minor...
Previous studies have reported the immunotoxicity of per- and polyfluoroalkyl substances (PFASs), but it remains a significant challenge to assess over 10,000 distinct PFASs registered in distributed structure-searchable toxicity (DSSTox) database. We aim reveal mechanisms different hypothesize that PFAS is dependent on carbon chain length. Perfluorobutanesulfonic acid (PFBA), perfluorooctanoic (PFOA), perfluorononanoic (PFNA) representing lengths (4-9) at environmentally relevant levels...
As the main anthropogenic source in open seas and coastal areas, ship emissions impact climate, air quality, human health. The latest marine fuel regulation with a sulfur content limit of 0.5% went into effect globally on January 1, 2020. Investigations after switching are necessary. In this study, online field measurements at an urban site modeling simulations were conducted to detect quality Greater Bay Area (GBA) China under new regulation. By utilizing high mass-resolution single...
Atmospheric deposition of particulate organic nitrogen (ONp) is a significant process in the global cycle and may be pivotally important for N-limited ecosystems. However, past models largely overlooked spatial chemical inhomogeneity atmospheric ONp were thus deficient assessing impacts. We constructed comprehensive model gaseous (ON), including latest knowledge on emissions secondary formations. Using this model, we simulated abundances consistent with observations. Our estimated ON was 26...
Abstract The frequency, intensity, and duration of extreme heatwaves are projected to increase in the global context climate change. However, evidence how anthropogenic emissions respond further impact air quality remains elusive. Here, we use satellite remote sensing measurements alongside chemical transport model simulations reveal abrupt variations primary secondary pollutants introduced by heatwaves. We highlight from China India, where sulfur dioxide (SO 2 ) nitrogen (NO columns over...
The hygroscopic properties of inorganic salt particles, including (NH4)2SO4, NaCl, Na2SO4 and NaNO3, are investigated using a self-assembled tandem differential mobility analyzer (H-TDMA) system. iso-GF (growth factor) curves derived to illustrate the effects initial particle size (D0) relative humidity (RH) on GFs. For those particles 100 nm, GFs measured agreed well with their theoretical Köhler curves. In range 20-200 NaCl all continuously decrease D0 increasing below deliquescence RH...
Size-resolved effective density, mixing state, and hygroscopicity of smoke particles from five kinds agricultural residues burning were characterized using an aerosol chamber system, including a volatility/hygroscopic tandem differential mobility analyzer (V/H-TDMA) combined with particle mass (APM). To profile relationship between the thermodynamic properties chemical compositions, PM1.0 PM2.5 also measured for water soluble inorganics, mineral elements, carbonaceous materials like organic...
Abstract Particle size distributions in the range of 0.01–10 µm were measured urban Shanghai summer 2013 using a Wide‐range Spectrometer (WPS). Size‐segregated aerosol samples collected concurrently Micro‐Orifice Uniform Deposit Impactor (MOUDI), which aided our in‐depth understanding new particle formation (NPF) mechanism polluted Yangtze River Delta area. During observations, 16 NPF events occurred at high temperatures (~34.7°C) on clear and sunny days. In ammonium‐poor PM 1.0 (particulate...
Previous studies in East Asia have revealed that the short-term associations between tropospheric ozone and daily mortality rate were strongest winter, which is opposite to findings North America Western Europe. Therefore, we investigated season-varying association 21 cities of from 1979 2010. Time-series Poisson regression models used analyze nonaccidental each city, testing for different temperature lags. The best-fitting model was obtained after adjustment previous 2 weeks. Bayesian...