Processing of Aerosols within a Mixed-Hardwood Forest Canopy: Results from the 2009 CABINEX Experiment
Abstract
During the summer of 2009 the Community Atmosphere Biosphere INteractions EXperiment (CABINEX) was conducted at the Program for Research on Oxidants: Photochemistry, Emissions, and Transport (PROPHET) facility in northern Michigan. A major goal of the study was to understand how aerosol physical and chemical properties are affected by emissions of biogenic volatile organic compounds (BVOCs) and by other environmental drivers within and just above the forest canopy. During CABINEX, extensive measurements of aerosol properties were made below the forest canopy, including particle size distribution, water-soluble composition, cloud-forming potential, and light scattering properties. Further measurements were made at two additional heights on the PROPHET tower and above the canopy from an airborne platform. This presentation synthesizes the available aerosol data from CABINEX to examine how processes on the canopy scale affect the aerosol population. The analysis will focus largely on two questions: 1) how does the variability in local turbulence conditions affect the gradient of particle size distribution through the canopy?; and 2) what are the hygroscopic properties of the aerosol population, and how do these measured properties reconcile with the available composition, size distribution, and light scattering data? Results of these analyses will be compared to meteorological and trace gas observations made during CABINEX to evaluate the importance of local canopy-scale aerosol processing relative to the larger-scale spatial and temporal variability.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.A21B0064E
- Keywords:
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- 0305 ATMOSPHERIC COMPOSITION AND STRUCTURE / Aerosols and particles;
- 0315 ATMOSPHERIC COMPOSITION AND STRUCTURE / Biosphere/atmosphere interactions