Global Tropospheric Experiment (GTE) http://www-gte.larc.nasa.gov/
GTE is primarily an aircraft-based program supplemented by ground-based measurements and satellite observations and aims to understand the chemical processes in the troposphere on a global scale.
International Global Atmospheric Chemistry Project http://www.igac.unh.edu/
Aimed at developing a fundamental understanding of the processes determining atmospheric composition, understanding interactions between atmospheric chemical composition and physical, biospheric and climatic processes, and to predict the impact of natural and anthropogenic forcings on the chemical composition of the atmosphere.
Jürgen M. Lobert http://www.jurgenlobert.net/
A site for atmospheric chemistry and earth science. J.M. Lobert's projects, publications, data and personal information and links for further studies.
ORNL/ESD Atmospheric Chemistry & Aerosol Group http://www.esd.ornl.gov/programs/ACA/
Activities include research on airborne releases of mercury compounds, airborne mercury speciation, atmospheric deposition in mountainous terrain, atmospheric mercury cycling, biogeochemical cycling of mercury in northern wetlands, and development of laser-induced plasma spectroscopy for continuous multielemental emission monitoring.