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Investigation of the Relationships Between Aerosol Physical and Chemical Properties Derived From In-Site Measurements and Their Impact on Aerosol Research Retrieval
Dean A. Hegg
Abstract: Funding is requested for the PI to participate in the Aerosol Forcing Science Team (AFST) and for modest salary support to pursue analyses of data sets which are largely in hand. In addition to the obvious tasks associated with participation in the AFST, two objectives are proposed for the supplemental support. The first is the quantification of the role of water of hydration on the radiative properties of atmospheric aerosols.Current remote sensing algorithms cannot differentiate the impact of water from that of changes in dry aerosol mass, composition or size. Clearly this is undesirable. The second objective is to find a widely applicable quantitative relationship between aerosol mass and number concentration over the critical size range in which particles can act as cloud condensation nuclei (CCN). This will greatly facilitate remote retrieval of CCN concentrations--a key parameter for assessment of indirect radiative forcing of climate by aerosols.
