A SPECTROSCOPIC TOUR THROUGH THE LIQUID AEROSOL INTERFACE - IMPLICATIONS FOR ATMOSPHERIC CHEMISTRY

A novel nonlinear Raman spectroscopic technique has been used to image the extent of hydrogen bonding at water aerosol interfaces. The aeros ols probed were generated in the laboratory using the vibrating orific e technique. The spectroscopic results show that the aerosols suffer s evere hydrogen bond disruption and that the structural impairment is m ore pronounced at the surface. Laboratory aerosols generated this way do not mimic those found naturally. Thus mass accommodation coefficien ts measured using such aerosols should not be used in global climate-m odeling calculations.