Spectroscopy and photochemistry of organic compounds in ice Check Access

Natural ice and snow are always contaminated by diverse inorganic and organic species, many of which can undergo photochemical transformations under solar radiation or react with photochemically produced reactive species. The courses of these reactions are often phase-specific and strongly depend on many factors, such as phase properties of a frozen aqueous matrix, the wavelength and intensity of light, the absorption properties and concentrations of chromophoric impurities, the presence of other species in the same phase or air above it, or the location of impurities within ice or snowpack. This lecture deals with some aspects of experimental spectroscopy and photochemistry of organic contaminants of ice and emphasizes the specific aspects of their photoreactions.