A5065350358- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Vehicle emissions and performance
- Urban Heat Island Mitigation
- Impact of Light on Environment and Health
- Plant responses to elevated CO2
- Environmental Changes in China
- Ionosphere and magnetosphere dynamics
- Meteorological Phenomena and Simulations
- Toxic Organic Pollutants Impact
- Plant Ecology and Soil Science
- Climate variability and models
- Environmental and Agricultural Sciences
- Conservation Techniques and Studies
- Building materials and conservation
- Methane Hydrates and Related Phenomena
- Indoor Air Quality and Microbial Exposure
- Aeolian processes and effects
- Spacecraft and Cryogenic Technologies
- Arctic and Antarctic ice dynamics
- Fire effects on ecosystems
Chinese Academy of Sciences
2015-2024
Institute of Earth Environment
2015-2024
Institute of Urban Environment
2016-2021
Shanghai Meteorological Bureau
2007-2020
Tianjin Meteorological Bureau
2020
NSF National Center for Atmospheric Research
2010-2019
State Key Laboratory of Loess and Quaternary Geology
2017-2018
Paul Scherrer Institute
2018
Academia Sinica
2010
Institute of Atmospheric Physics
2006-2008
The Model for Ozone and Related chemical Tracers, version 4 (MOZART-4) is an offline global transport model particularly suited studies of the troposphere. updates from its previous MOZART-2 are described, including expansion mechanism to include more detailed hydrocarbon chemistry bulk aerosols. Online calculations a number processes, such as dry deposition, emissions isoprene monoterpenes photolysis frequencies, now included. Results eight-year simulation (2000–2007) presented evaluated....
We have developed a global three‐dimensional chemical transport model called Model of Ozone and Related Chemical Tracers (MOZART), version 2. This model, which will be made available to the community, is built on framework National Center for Atmospheric Research (NCAR) Transport Chemistry (MATCH) can easily driven with various meteorological inputs resolutions. In this work, we describe standard configuration in by every 3 hours from middle atmosphere NCAR Community Climate (MACCM3) uses...
Atmospheric aerosols often contain a substantial fraction of organic matter, but the role compounds in new nanometer-sized particle formation is highly uncertain. Laboratory experiments show that nucleation sulfuric acid considerably enhanced presence aromatic acids. Theoretical calculations identify an unusually stable acid-sulfuric complex, which likely leads to reduced barrier. The results imply interaction between and acids promotes efficient sulfate polluted atmosphere because emissions...
Abstract. The AeroCom exercise diagnoses multi-component aerosol modules in global modeling. In an initial assessment simulated distributions for mass and mid-visible optical thickness (aot) were compared among 20 different modules. Model diversity was also explored the context of previous comparisons. For component combined aot general agreement has improved annual mean. At 0.11 to 0.14, values are at lower end averages suggested by remote sensing from ground (AERONET ca. 0.135) space...
The Model for Ozone and Related Chemical Tracers, version 3 (MOZART‐3), which represents the chemical physical processes from troposphere through lower mesosphere, was used to evaluate representation of long‐lived tracers ozone using three different meteorological fields. fields are based on (1) Whole Atmosphere Community Climate Model, 1b (WACCM1b), (2) European Centre Medium‐Range Weather Forecasts (ECMWF) operational analysis, (3) a new reanalysis year 2000 ECMWF called EXP471....
We present a new global three‐dimensional chemical‐transport model (called MOZART) developed in the framework of NCAR Community Climate Model (CCM) and aimed at studying distribution budget tropospheric ozone its precursors. The model, with horizontal resolution 2.8° longitude latitude, includes 25 levels vertical between Earth's surface an upper boundary located approximately 35 km altitude. In configuration calculates 56 chemical constituents timestep 20 min, accounts for emission...
We present here a fully coupled global aerosol and chemistry model for the troposphere. The is used to assess interactions between aerosols chemical oxidants in troposphere, including (1) conversion from gas‐phase into condensed phase during formation of aerosols, (2) heterogeneous reactions occurring on surface (3) effect ultraviolet radiation photolysis rates. study uses three‐dimensional chemical/transport model, Model Ozone Related Chemical Tracers, version 2 (MOZART‐2), which are with...
Light-absorbing organic carbon (i.e., brown or BrC) in the atmospheric aerosol has significant contribution to light absorption and radiative forcing. However, link between BrC optical properties chemical composition remains poorly constrained. In this study, we combine spectrophotometric measurements analyses of samples collected from July 2008 June 2009 urban Xi'an, Northwest China. Elevated was observed winter (5 times higher than summer), largely due increased emissions wintertime...
Abstract. Rapid industrialization and urbanization have caused frequent occurrence of haze in China during wintertime recent years. The sulfate aerosol is one the most important components fine particles (PM2. 5) atmosphere, contributing significantly to formation. However, heterogeneous formation mechanism remains poorly characterized. relationships observed with PM2. 5, iron, relative humidity Xi'an, been employed evaluate develop a parameterization involving water for incorporation into...
Abstract In recent years, severe haze events often occurred in China, causing serious environmental problems. The mechanisms responsible for the formation, however, are still not well understood, hindering forecast and mitigation of pollution. Our study 2012–13 winter Beijing shows that atmospheric water vapour plays a critical role enhancing heavy events. Under weak solar radiation stagnant moist meteorological conditions winter, air pollutants accumulate shallow planetary boundary layer...
Cloud layers in the troposphere influence photolysis rates ( J values) and hence concentrations of chemical species. In order to study impact clouds on oxidants, we have developed a simplified version National Center for Atmospheric Research (NCAR) Tropospheric Ultraviolet‐Visible (TUV) model coupled TUV (otherwise known as fast (FTUV)) into NCAR/Atmospheric Chemistry Division global transport (Model Ozone Related Chemical Tracers (MOZART‐2)). The FTUV has same physical processes model,...
Abstract. The effects of unified aerosol sources on global fields simulated by different models are examined in this paper. We compare results from two AeroCom experiments, one with (ExpA) and emissions, injection heights, particle sizes at the source (ExpB). Surprisingly, harmonization has only a small impact inter-model diversity burden, consequently optical properties, as largely controlled model-specific transport, removal, chemistry (leading to formation secondary aerosols)...
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...