A5071600893- Atmospheric chemistry and aerosols
- Plant responses to elevated CO2
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Climate Change and Geoengineering
- Vehicle emissions and performance
- Climate Change Policy and Economics
- Global Energy and Sustainability Research
- Air Quality Monitoring and Forecasting
Chinese University of Hong Kong
2015-2023
University of Edinburgh
2020-2021
University of Hong Kong
2020
Peking University
2015
Surface ozone (O 3 ) pollution poses significant threats to crop production and food security worldwide, but an assessment of present-day future yield losses due exposure O still abides with great uncertainties, mostly due: (1) the large spatiotemporal variability uncertain projections concentration itself; (2) different methodological approaches quantify impacts; (3) difficulty in accounting for co-varying factors such as CO 2 climatic conditions. In this paper, we explore these issues...
Abstract. Tropospheric ozone is one of the most hazardous air pollutants as it harms both human health and plant productivity. Foliage uptake via dry deposition damages photosynthesis causes stomatal closure. These foliage changes could lead to a cascade biogeochemical biogeophysical effects that not only modulate carbon cycle, regional hydrometeorology climate, but also cause feedbacks onto surface concentration itself. In this study, we implement semi-empirical parameterization damage on...
Abstract The decline in Amazonian deforestation rates and biomass burning activity (2001–2012) has been shown to reduce air pollutant emissions (e.g., aerosols) improve regional quality. However, the Cerrado region (savannah grasslands northeastern Brazil), satellite observations reveal increases fire tropospheric column nitrogen dioxide (an ozone precursor) during season (August‐October, 2005–2016), which have partially offset these quality benefits. Simulations from a 3‐D global chemistry...
Abstract. Tropospheric ozone is an air pollutant that substantially harms vegetation and also strongly dependent on various vegetation-mediated processes. The interdependence between may constitute feedback mechanisms can alter concentration itself but have not been considered in most studies to date. In this study we examine the importance of dynamic coupling surface leaf area index (LAI) shaping quality vegetation. We first implement empirical scheme for damage Community Land Model (CLM)...
Abstract. Surface ozone (O3) is an important air pollutant and greenhouse gas. Land use land cover one of the critical factors influencing ozone, in addition to anthropogenic emissions climate. change (LULCC) can on hand affect “biogeochemically”, i.e., via dry deposition biogenic volatile organic compounds (VOCs). LULCC other alter regional- large-scale climate through modifying albedo evapotranspiration, which lead changes surface temperature, hydrometeorology, atmospheric circulation that...
Abstract. Tropospheric ozone is one of the most hazardous air pollutants as it harms both human health and plant productivity. Foliage uptake via dry deposition damages photosynthesis causes stomatal closure. These foliage changes could lead to a cascade biogeochemical biogeophysical effects that not only modulate carbon cycle, regional hydrometeorology climate, but also cause feedbacks onto surface concentration itself. In this study, we implement semi-empirical parameterization damage on...
Abstract Studies of the impacts solar geoengineering have mostly ignored tropospheric chemistry. By decreasing sunlight reaching Earth's surface, may help mitigate anthropogenic climate change, but changing also alters rates chemical reactions throughout troposphere. Using GEOS‐Chem atmospheric chemistry model, we show that stratospheric aerosol injection (SAI) with sulfate, a frequently studied method, can perturb composition over span 10 years, increasing oxidative capacity by 9% and...
Abstract. We assess how nitrogen oxides (NOx = NO + NO2), carbon monoxide (CO) and formaldehyde (HCHO) can be used as proxies to determine the combustion contribution atmospheric dioxide (CO2) using satellite observations. focus our analysis on 2018 when there is a full complement of column data from TROPOspheric Monitoring Instrument (NO2, CO, HCHO) Orbiting Carbon Observatory-2 (CO2). use nested GEOS-Chem chemistry model relate high-resolution emission inventories over Europe these data,...
Abstract. Tropospheric ozone is a significant air pollutant with substantial harm on vegetation, but also strongly dependent various vegetation-mediated processes. The interdependence between and vegetation may constitute feedback mechanisms that can alter concentration itself have not been considered in most studies to date. In this study we examine the importance of biogeochemical coupling surface leaf area index (LAI) shaping quality foliage density. We first implement an empirical scheme...
Abstract. Surface ozone (O3) is an important air pollutant and greenhouse gas. Land use land cover (LULC) one of the critical factors influencing ozone, in addition to anthropogenic emissions climate. LULC change can on hand affect biogeochemically, i.e., via dry deposition biogenic volatile organic compounds (VOCs). other alter regional- large-scale climate through modifying albedo evapotranspiration, which lead changes surface temperature, hydrometeorology atmospheric circulation that...