To obtain further insights into the evolution of atmospheric aerosol chemistry over time, our group uses transportable ATOFMS instruments in field studies at various locations in the continental United States.
The instruments have been used on ships to probe marine aerosols as well as aircraft studies. The ATOFMS measures aerodynamic diameter and chemical composition of individual particles and thus provides information on the number fractions of the major sources of aerosols, temporal variations in chemistry, and particle size. Being capable of providing such high time resolution data, the ATOFMS can capture rapid ambient events such as new particle formation and growth that are impossible to detect by techniques that require longer sampling times.
Carbonaceous Aerosols and Radiative Effect Study (CARES) and CalNex (May and June 2010)