Revision as of 09:41, 25 April 2014

Sources of Chinese air pollutants

Team members: Nan LI, Yue JIAN, Heng TIAN, Hansen CAO, Tzung-May FU

Volatile organic compounds (VOCs): global and regional emissions and impacts

Team members: Hansen CAO, Heng TIAN

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]

Publication: Fu et al. [2007], Millet et al. [2007], Palmer et al. [2006]

Secondary organic aerosols (SOA)

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.

Team members: Nan LI, Li XING, Tzung-May FU

Chemistry-Climate interactions and Chemistry-Climate Model (CCM) development

Team members: Jinxuan CHEN, Yaping MA, Wanying KANG, Aoxing ZHANG, Ye QING

Measurements of Chinese PM2.5 composition

Team members: Wei XU, Jinxuan CHEN, Heng TIAN, Aoxing ZHANG

Air-sea exchange of organic materials

Team members: Cenlin HE, Tzung-May FU

The ocean can act both as a source and a sink of atmospheric organic material. The air/sea exchange of organic materials is complexly regulated by both physical and biological conditions at the interface and poorly understood. We developed a new conceptual model 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.

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Long-range transport of pollutants

Team member: Yue JIAN

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