Refreshments will be served from 3:30-4:00PM
The seminar will be held 4:00-5:00PM

Abstract
Aerosol particles are ubiquitous throughout the atmosphere and have far-reaching influences on the global radiation budget, climate, visibility, and human health. These particles range in size from molecular clusters of freshly nucleated material up to visible dust particles larger than 1 mm in diameter. They may be simple particles of NaCl or composed of hundreds or even thousands of organic and inorganic compounds which vary greatly based on the aerosol source and transport history. Concentrations range from as low as 50 particles per cm3 in remote arctic areas up to millions per cm3 in certain urban locations. They affect the Earth