| Summary: | OASIS researchers Kirk Ullmann and Sam Hall remove frost from the optics of instruments used to measure the solar spectra, deriving rates of ozone, nitrogen _dioxide, and other important atmospheric constituents. These rates are key to understanding the complex atmospheric chemistry of the Arctic. Ullmann and Hall participated in the 2009 field phase of OASIS (Ocean_Atmosphere_Sea Ice_Snowpack), which made some of the most extensive measurements ever on the chemical exchanges between polar air, snow, frost, brine, and sea ice. Part of International Polar Year, OASIS tackled a number of standing questions in polar chemistry, with the emphasis on the life cycle of pollutants that drift into the Arctic.
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