Research underconstruction
Contents
- 1 Current projects
- 1.1 Sources of Chinese air pollutants
- 1.2 Volatile organic compounds (VOCs): global and regional emissions and impacts
- 1.3 Secondary organic aerosols (SOA)
- 1.4 Chemistry-Climate interactions
- 1.5 Measurements of Chinese PM2.5 composition
- 1.6 Air-sea exchange of organic matters
- 1.7 Constraining sources of pollutants using in situ and remote sensing observations
- 1.7.1 Carbonaceous aerosols in China: top-down constraints on primary sources and estimation of secondary contribution
- 1.7.2 Carbonaceous aerosols in the Pearl River Delta region
- 1.7.3 Space-based constraints on volatile organic compound emissions in China
- 1.7.4 Constraining Asian volatile organic gases emissions using space-based observations=
- 1.8 Understanding the climate change penalty on air quality
- 1.9 Quantifying the climate impact of organic aerosols
- 1.9.1 Developing a physics-based parameterization scheme for organic aerosol size evolution
- 1.9.2 Constraining historical black carbon emissions in China (1850-2000)
- 1.9.3 Accounting for the impacts of the subgrid variability of RH on aerosol optical depth in large-scale models
- 1.9.4 Mapping volatile organic compound emissions using formaldehyde measurements from satellites
- 1.9.5 Understanding the sources and production mechanisms of organic aerosols
- 1.9.6 Constraining the global budget of atmospheric oxygenated organics
- 2 Completed projects
Current projects
Sources of Chinese air pollutants
Team members: Nan LI, Yue JIAN, Heng TIAN, Hansen CAO, Tzung-May FU
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Volatile organic compounds (VOCs): global and regional emissions and impacts
Team members: Hansen CAO, Heng TIAN
Secondary organic aerosols (SOA)
Team members: Nan LI, Li XING, Tzung-May FU
Chemistry-Climate interactions
Team members: Jinxuan CHEN, Yaping MA, Wanying KANG, Aoxing ZHANG
Measurements of Chinese PM2.5 composition
Team members: Wei XU, Jinxuan CHEN, Heng TIAN, Aoxing ZHANG
Air-sea exchange of organic matters
Team members: Cenlin HE, Tzung-May FU
Constraining sources of pollutants using in situ and remote sensing observations
Carbonaceous aerosols in China: top-down constraints on primary sources and estimation of secondary contribution
Carbonaceous aerosols in the Pearl River Delta region
Space-based constraints on volatile organic compound emissions in China
[ Open Urban]
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Constraining Asian volatile organic gases emissions using space-based observations=
Team member: Hansen CAO
Understanding the climate change penalty on air quality
Team member: Jinxuan CHEN, Wanying KANG, Aoxing ZHANG, Yiqi ZHENG
Quantifying the climate impact of organic aerosols
Team member: Nan LI
Developing a physics-based parameterization scheme for organic aerosol size evolution
Team member: Li XING
Constraining historical black carbon emissions in China (1850-2000)
Team member: Yue JIAN
Accounting for the impacts of the subgrid variability of RH on aerosol optical depth in large-scale models
Team member: Ye QING
Mapping volatile organic compound emissions using formaldehyde measurements from satellites
Volatile organic compounds (VOC) is an important class of atmospheric constituents, impacting the production of ozone, the oxidation power of the atmosphere, the lifetime of other green house gases and pollutants, and the production of organic aerosols.
VOCs are emitted into the atmosphere from both natural and anthropogenic activities, and quantifying these many overlapping sources can be a challenge. We use satellite observations of formaldehyde (HCHO), an oxidation product of many VOCs, to make 'top-down' estimates of VOC emissions from each source.
Publication: Fu et al. [2007], Millet et al. [2007], Palmer et al. [2006]
Team member: Hansen CAO, Heng TIAN
Understanding the sources and production mechanisms of organic aerosols
Secondary organic aerosols (SOA) are the organic mass transferred into the particulate phase in the atmosphere. Many recent observations have found SOA concentrations to be much higher than can be explained by current models in most parts of the atmosphere.
Using a global 3-D atmospheric chemistry model, we investigate the missing source of SOA. In particular, we find that the heteorogeneous uptake of dicarbonyls in aeorsols and clouds can help explained the observed SOA concentrations and variability.
Publication: Fu et al., [2009], Fu et al. [2008], Henze et al. [2008], van Donkelaar et al. [2007]
Team member: Li XING
Constraining the global budget of atmospheric oxygenated organics
Oxygenated VOCs (OVOCs), including acetone, methanol, etc, are present in high concentrations throughout the atmosphere. Their abundance and distribution have large impacts on the oxidation power of the troposphere, particularly in remote regions.
The budgets of OVOCs are not well understood. One of the major sources of uncertainty is whether the ocean acts as a source or a sink to the atmosphere. The air/sea exchange is complexly regulated by both physical and biological conditions at the interface. We propose a new air/sea transfer module to account for these physical and biological processes, including the presence of microfilms, production/consumption of organic matter by marine life, and other photochemical processes.
Team member: Hansen CAO, Cenlin HE
Completed projects
Impacts of smoke plume injection heights over the Peninsular Southeast Asia on pollutant long-range transport
Team member: Yue JIAN
