Laboratory Investigations of Heterogeneous Interactions Involving Atmospheric Trace Gases and Ice

大气中的微量气体经常接触许多云中的冰的表面，以及寒冷气候地区的地球表面。这种非均质气冰相互作用的性质在很大程度上仍然是未知的，因此已经设计了特定的实验来深入了解相应的分子尺度机制，并提供用于大气模型的参数的定量估计。这些实验将获得动力学和热力学数据，因为氮、硫和氯族的无机气体被允许在受控条件下接触冰粒。这项研究的主要工具将是一个新的、几乎无壁的连续流动反应器，其大气压电离质谱仪与反应器连接，用于在线分析气态反应产物。将被研究的化学系统包括SO2（二氧化硫）- O3（臭氧）-冰气溶胶，HNO3（硝酸蒸汽）-冰或H2SO4，这些化学系统的解释方式允许在大气中的多相化学现象被量化，并根据自然的基本过程来理解。

9319119 Lamb Atmospheric trace gases frequently contact the surfaces of ice in many clouds, as well as the earth's surface in cold climatic regions. The nature of such heterogenous gas-ice interactions is still largely unknown, so specific experiments have been designed to gain insight into the corresponding molecular-scale mechanisms and to provide quantitative estimates of parameters used in atmospheric models. These experiments will acquire both kinetic and thermodynamic data as inorganic gases in the nitrogen, sulfur and chlorine families are allowed to contact ice particles under controlled conditions. The primary tool for this research will be a new, virtually wall-less, continuous flow reactor with an atmospheric pressure ionization-mass spectrometer interfaced to the reactor for on-line analysis of the gaseous reaction products. The chemical systems which will be studied include SO2 (sulfur dioxide) - O3 (ozone) - ice aerosols, HNO3 (nitric acid vapor) - ice or H2SO4 interpreted in ways that permit multiphase chemical phenomena in the atmosphere to be quantified and understood in terns of nature's fundamental processes.