INVITED ABSTRACT
The AMIGAS and NCCN Campaigns: Investigating Primary and Secondary Particle Formation, Growth, and Transformation in the Southeastern US

STEPHANIE L. SHAW (1), Peter H. McMurry (2), Eladio M. Knipping (1), Eric S. Edgerton (3), John J. Jansen (4)

(1) Electric Power Research Institute (2) University of Minnesota, Minneapolis (3) Atmospheric Research & Analysis, Inc. (4) Southern Company Services

     Abstract Number: 544
     Last modified: May 13, 2010

Abstract
Two intensive field campaigns were recently held at the Atlanta-area urban-rural site pair of the Southeastern Aerosol Research and Characterization (SEARCH) Network in the Southeastern U.S. The August Mini-Intensive Gas and Aerosol Study (AMIGAS) was held in August to September of 2008, and involved approximately 7 laboratories and 15 new datasets beyond those regularly collected in the SEARCH program. These included measurements by Air Quality Designs, the California Institute of Technology, Georgia Institute of Technology, the Tennessee Valley Authority, and U.C. San Diego. The purpose of the campaign was to investigate the role of interactions between biogenic and anthropogenic emissions in the formation and transformation of particulate matter, and specifically secondary organic aerosol. The Nucleation and Cloud Condensation Nuclei (NCCN) campaign was held in July - August of 2009, with 7 groups of researchers participating from Georgia Tech, National Center for Atmospheric Research, and the University of Minnesota. The campaign’s focus was on the development of microphysical models for nucleation, related growth rates, and determining the impact of new particle formation on cloud condensation nuclei. Highlights from both campaigns will be described, including extensive compositional analysis of day versus night hi-volume PM2.5 sampling, such as organosulfate and organic nitrogen measurements (AMIGAS), compositional and mixing state impacts on CCN, and the implementation of new instruments that can measure full particle size distributions (NCCN).