Laboratory Investigations of Heterogeneous Interactions Involving Atmospheric Trace Gases and Ice

9319119兰姆大气痕量气体经常接触许多云中的冰面，以及寒冷气候地区的地球表面。这种异质气体-冰相互作用的性质在很大程度上仍不清楚，因此已经设计了具体的实验，以深入了解相应的分子尺度机制，并提供大气模型中使用的参数的定量估计。这些实验将获得动力学和热力学数据，因为氮、硫和氯家族中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种新的、几乎无壁的连续流动反应器，该反应器连接有一个大气压电离质谱仪，用于在线分析气态反应产物。将研究的化学体系包括二氧化硫(二氧化硫)-臭氧(臭氧)-冰气溶胶、硝酸(硝酸蒸气)-冰或硫酸，其解释方式使大气中的多相化学现象得以量化并以自然基本过程的方式加以理解。

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.