Numerical modeling of sulfur and nitrogen chemistry in a narrow cold- frontal rainband: the impact of meteorological and chemical parameters

The peak sulfate deposition occurred behind the primary updraft, where melting graupel was the dominant source of precipitation, and in the leading rainband. The peak nitrate deposition occurred behind the main updraft and at the leading edge of the main updraft. Sulfur dioxide, aerosol nitrate, and peroxyacetylnitrate were transported to higher altitudes, while aerosol sulfate, nitric acid, and hydrogen peroxide were depleted by the storm. When the depth of the storm was increased, the accumulated sulfate deposition decreased, while the accumulated precipitation increased. When the initial shear for the storm was decreased, the accumulated sulfate deposition increased, while the accumulated precipitation decreased. -from Author