Our overarching goal is to explore and understand atmospheric compositions and their impacts on pollution and climate. To do so, we use chemical transport models (CTM) together with observations (from all scales: ground, drone, aircraft, satellite, etc.) to study the chemistry and physics in the atmosphere.

Here are the main research themes in our group:

Modeling of Global Tropospheric Chemistry

Tropospheric chemsitry contributes to a series of issues in the earth system, such as air pollution, climate change, and ecological destruction. Modeling plays an important role in studying tropospheric chemistry by identifying processes, interpreting observations, assessing impacts, and making projections.

In the group, we develop and use model schemes based on the GEOS-Chem global model framework to study the oxidants, gases, aerosols, and foundamental chemistry in troposphere. Current topics inlcude: global halogen budget and chemistry; impacts of ocean on atmosphere; heterogeneous reactions around tropopause …

Aerosol Absorptions and their Impacts on Climate

Aerosols are important due to their adverse effects on human health and their direct and indirect radiative effects on climate. While all aerosols scatter light, some aerosols are also able to absorb light. These absorptions are significant and very uncertain factors contributing to global climate forcing.

In the group, we focus on understanding the sources, lifecycles, and absorption properties of atmospheric aerosols. Current topics include: black carbon and brown carbon; aerosol radiative effects; influence of chemical aging on aerosol optical properties …

Regional Air Quality in Asia

Air pollution in Asia is among the worst in the world and have significant impacts on public health and economy. Exposure to particulate matter (PM) and ozone, the major two air pollutants, are responsible for millions of deaths per year. Formations of these pollutants are largely affected by complex chemical reactions and meteorological processes. Recent new measurements in Asia provide important information for invesigating these processes.

In the group, we combine model simulations and measurement analysis to explore the chemical mechanisms controlling the formation of air pollutants, and make recommendations for air pollution control strategies. Current topics include: secondary aerosol formation; air quality in coastal environments …

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