ROW: Uptake and Oxidation For S02 On Snow

在一年中的一段时间里，雪覆盖着地球表面的许多部分；在经历季节性积雪融化的地区，径流在地表水和地下水系统的补给中发挥着重要作用。然而，积雪堆积着人为的和“天然的”污染物。这些积累的物质将在春季融化时进入水生系统。化学负荷不会逐渐进入水系统；在最初的熔融期，很大一部分化学负荷是从包装底部释放出来的。其结果是，一些流域在短时间内接收了大量的酸、痕量金属和其他污染物。预计这项工作的结果将有助于理解积雪过程，特别是积雪中气体的清除和酸度的形成。这项拟议工作的目的是深入了解积雪中酸度形成的物理和化学过程。这些实验旨在研究二氧化硫的吸收和氧化/还原反应，这些反应可能会导致雪的酸度。将对雪中吸附的气体随时间变化的量以及雪中的氧化产物进行模拟，以深入了解其化学和物理机制。

Snow covers many parts of the earth's surface for a portion of the year; and in areas that experience seasonal snowmelt, the runoff plays an important role in recharging surface water and groundwater systems. Snowpacks, however, accumulate manmade and "natural" pollutants. This accumulated material will enter aquatic systems during spring melt. The chemical load does not enter the aquatic systems gradually; a substantial fraction of the chemical load is released from the base of the pack in the initial melt period. The result is some watersheds receive significant amounts of acids, trace metals, and other contaminants in a short period of time. It is expected that the results of this work will contribute to the understanding of snowpack processes, in particular the scavenging of gases and the formation of acidity in the snowpack. The purpose of the proposed work is to gain insight into the physical and chemical processes involved in the formation of acidity in snowpack. The experiments are designed to investigate the incorporation of sulfur dioxide and the oxidation/reduction reactions that can contribute to the acidity of snow. The amount of gas sorbed on the snow as a function of time and the oxidation products in the snow will be modeled to gain insight as to the chemical and physical mechanisms.