Composition of Bromine Aerosols Related to Ozone Destruction in the Arctic

北极圈下部臭氧破坏的一个过程 对流层似乎是气态溴和 臭氧，产生可过滤的溴气溶胶， 超过了大气中海盐的预期含量 类似的过量溴气溶胶也在低北极地区观测到 平流层，这意味着气态溴可能是负责 臭氧层也会受到破坏。 1989年春天， 北极辐射和化学的飞机部件 实验收集了剖面形式的颗粒气溶胶样品 到平流层。 这些样本将 用高分辨率分析电子显微镜检查， 确定单个颗粒的形态和组成。 的 系统能够提供元素的定量分析， 碳到铀（原子序数范围为6到92）。 与此同时， 将收集散装气溶胶样本并分析元素 使用X射线荧光技术对组合物进行分析。 然后它将 可以确定边界中过量的溴是否 层气溶胶是自然或人为的起源，无论它 与臭氧反应产生溴化物气溶胶， 在较低的温度下观察到过量的可过滤溴气溶胶 平流层也可能是溴气体臭氧的产物 破坏反应。

One process for the destruction of ozone in the lower arctic troposphere appears to be the reaction between gaseous bromine and ozone, producing filterable bromine aerosols whose abundance exceeds that expected from the sea salt in the atmosphere. Similar excess bromine aerosols is observed in the lower arctic stratosphere, implying that gaseous bromine may be responsible for ozone destruction there as well. In the Spring of 1989, the aircraft component of the Arctic Radiation and Chemistry Experiment collected particulate aerosol samples in profiles form near the surface to the stratosphere. These samples will be examined with a high resolution analytical electron microscope to determine individual particle morphology and composition. The system is able to provide quantitative analyses for elements from Carbon to Uranium (atomic number range of 6 to 92). Concurrently, bulk aerosol samples will be collected and analyzed for elemental composition using x-ray fluorescence techniques. It will then be possible to determine whether the excess bromine in the boundary layer aerosol is of natural or anthropogenic origin, whether it reacts with ozone to produce a bromide aerosol, and whether the excess filterable bromine aerosol observed in the lower stratosphere may also be the product of a bromine gas-ozone destruction reaction.