A5102937580- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Atmospheric and Environmental Gas Dynamics
- Indoor Air Quality and Microbial Exposure
- Wildlife-Road Interactions and Conservation
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Particle Dynamics in Fluid Flows
- COVID-19 impact on air quality
- Transportation Planning and Optimization
- Urban Design and Spatial Analysis
- Impact of Light on Environment and Health
Institute of Atmospheric Physics
2017-2025
Chinese Academy of Sciences
2017-2025
University of Chinese Academy of Sciences
2017-2024
Institute of Urban Environment
2018-2022
Czech Academy of Sciences, Institute of Atmospheric Physics
2020
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry
2018
Peking University
2018
The Nested Air Quality Prediction Model System (NAQPMS) was used to investigate an extreme regional haze episode persisting over the Beijing-Tianjin-Hebei megacity cluster from November 26 December 1, 2015. During this event, daily mean PM2.5 exceeded 500 μg/m3. We found that local emissions were main source of Beijing and Hebei in early formational stage episode. accumulation regionally transported, highly aged secondary inorganic aerosols (SIA) along foot mountains responsible (60%) for...
Currently, many challenges are faced in simulating ozone(O3), sulfate(SO42-), and nitrate(NO3-) concentrations over East Asia, particularly the overestimation of surface O3 NO3- underestimation SO42- concentration during haze episodes. In this study, we examined radiative heterogeneous chemical effects aerosols by incorporating recently reported mechanisms, including self-amplifying formation, dinitrogen pentoxide (N2O5) hydrolysis, a reaction converting gaseous nitric acid (HNO3) to oxide...
Abstract. Beijing has suffered from heavy local emissions as well regional transport of air pollutants, resulting in severe atmospheric fine-particle (PM2.5) pollution. This study developed a combined method to investigate source types PM2.5 and its regions during winter 2016 Beijing, which include the receptor model (positive matrix factorization, PMF), footprint an quality model. The PMF was performed with high-time-resolution measurements trace elements, water soluble ions, organic carbon...
Abstract Most previous studies treat regional transport of aerosols as a whole, without distinguishing the secondary and that their precursors. A new method quantifying forms inorganic (SIA) using Nested Air Quality Prediction Modeling System was proposed. The contribution nonlocal emissions to SIA in receptor region divided into three parts: (1) chemically formed by source regions; (2) during transport; (3) region, representing In North China Plain, precursors produced are two main forms....
Abstract. Regional transport and heterogeneous reactions have been shown to play crucial roles in haze formation over a megacity cluster centered on Beijing. In this study, the updated Nested Air Quality Prediction Model System (NAQPMS) Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model were employed investigate evolution of aerosols – terms number concentration, size distribution, degree aging Beijing during six episodes between 15 November December 2016, as part...
We developed a new modeling framework to simulate aerosol microphysics by incorporating volatility basis-set (VBS) organic (OA) module into three-dimensional (3-D) atmospheric transport model, namely, Nested Air Quality Prediction Modeling System with an Advanced Particle Microphysics (NAQPMS + APM). The model calculates not only the condensation of sulfuric acid, nitrate, and ammonium coagulation five types particles (namely secondary, sea salt, dust, black carbon particles) but also...
Abstract. In this study, a full description and comprehensive evaluation of global–regional nested model, the Aerosol Atmospheric Chemistry Model Institute Physics (IAP-AACM), is presented for first time. Not only are global budgets distribution explored, but comparisons simulation over China against multiple datasets investigated, which benefit from access to Chinese air quality monitoring data 2013 present “Model Inter-Comparison Study Asia” project. The model results analysis can help...
Abstract. Aerosol microphysical processes are essential for the next generation of global and regional climate air quality models to determine particle size distribution. The contribution organic aerosols (OAs) formation, mass, number concentration is one major uncertainties in current models. A new global–regional nested aerosol model was developed simulate detailed processes. combines an advanced microphysics (APM) module a volatility basis set (VBS) OA calculate kinetic condensation...
The Central Plains Economic Region (CPER) located along the transport path to Beijing-Tianjin-Hebei area has experienced severe PM2.5 pollution in recent years. However, few modeling studies have been performed on sources of PM2.5, especially impacts emission reduction strategies. In this study, Nested Air Quality Prediction Model System (NAQPMS) with an online tracer-tagging module was adopted investigate source sectors and a series sensitivity tests were conducted different sector-based...
Abstract The refined source apportionment of ammonium (NH 4 + ), especially for biomass burning emissions, is unclear. Hourly resolution δ 15 N‐NH values three winter haze episodes (EP1–EP3) were determined in the North China Plain (NCP) 2019 to identify and quantify contribution burning. A reasonable source‐resolved structure NH was obtained after using corrected signatures N considering emissions. time‐series variation vehicle sources identified by more matched better with their tracers...
Abstract. Vertical distributions of dicarboxylic acids, oxoacids, α-dicarbonyls and other organic tracer compounds in fine aerosols (PM2.5) were investigated at three heights (8, 120 260 m) based on a 325 m meteorological tower urban Beijing the summer 2015. Results showed that concentrations oxalic acid (C2), predominant diacid, more abundant (210±154 ng m−3) (220±140 than those ground surface (160±90 m−3). Concentrations phthalic (Ph) decreased with increase height, indicating local...
Recently, ozone (O3) pollution has become a significant problem for Beijing owing to its high traffic volume. To improve the simulation of street-scale nitrogen oxides (NOx) and O3, an integrated air quality modeling system coupling regional urban/street (IAQMS-street) was developed Beijing. A weather research forecasting atmospheric model, nested prediction system, model urban network intersection canyons highways, real-time on-road emission were coupled by downscaling method. two-week with...
Our study provides unique information on the vertical profiles and size distribution of urban organic aerosols by FT-ICR MS.
Abstract The stratospheric contribution to tropospheric ozone has long been a topic of much debate over the past few decades. In this study, we leveraged multiple datasets from surface, sounding and satellite observations reanalysis datasets, along with global chemical transport model (Global Nested Air Quality Prediction Modelling System, GNAQPMS) investigate impact stratospheric-to-tropospheric (STT) event characterized by duration wide range in summer on surface high episodes heavily...
Abstract Sulfate (SO 4 2− ) sources are unclear leading to the underestimation of its concentration in model. Hourly resolution δ 34 S‐SO 2 and values three haze episodes (EP1‐EP3) were synchronously collected for first time quantify influence S fractionation from emission (e.g., coal combustion) SO atmospheric oxidation on /SO source apportionment. After considering combustion oxidation, reasonable logical contributions obtained, showing highly consistent with that Positive Matrix...
In recent years, air quality issues due to fine particulate matter have been sufficiently treated. However, ozone (O3) has now become the primary pollutant in summer on North China Plain (NCP). this study, a three-dimensional chemical transport model (the Nested Air Quality Prediction Model System, NAQPMS) coupled with an online source apportionment module was applied investigate sources of O3 pollution over NCP. Generally, NAQPMS adequately captured observed spatiotemporal features during...
Abstract. Owing to the substantial traffic emissions in urban areas, especially near road concentrations of pollutants, such as ozone (O3) and its precursors, have a large difference compared regional averages, their distributions cannot be captured accurately by traditional single-scale air quality models. In this study, new version urban–street network model (an Integrated Air Quality Modeling System coupling urban–street: IAQMS-street v2.0) is presented. An upscaling module implemented...
Abstract. Many efforts have been devoted to quantifying the impact of intercontinental transport on global air quality by using chemical models with horizontal resolutions hundreds kilometers in recent decades. In this study, a online source–receptor model (GNAQPMS-SM) is designed effectively compute contributions various regions ambient pollutant concentrations. The newly developed able quantify (S-R) relationships one simulation without introducing errors nonlinear chemistry. We calculate...