Low temperature reactivity of tropospheric aerosols

气溶胶是悬浮在气体介质（例如空气）中的非常小的液体和固体颗粒。它们会影响地球大气中痕量气体的化学性质。这个项目有两个部分。在第一，我们建议开发一个国家的最先进的设备，将允许在低温下，并在一个显着提高的准确度和精度的水平，目前可用的颗粒尺寸和相关性能的测量。第二，我们想用这种新仪器来研究大气痕量气体与不同类型气溶胶颗粒的反应性。这些测量将提高和扩展我们在计算机模型中描述全球尺度大气化学的能力。所提出的工作方案涉及在与极地地区有关的条件下和在大气中较高高度进行化学研究。

Aerosols are very small liquid and solid particles suspended in a gaseous medium, e.g. air. They influence the chemistry of trace gases within the Earth's atmosphere. This project has two parts. In the first we propose to develop a state of the art apparatus that will allow measurements of particle size and related properties at low temperatures and at a significantly improved level of accuracy and precision over what is currently available. Second, we want to use this new instrument to study the reactivity of atmospheric trace gases with different types of aerosol particles. These measurements will improve and extend our ability to describe atmospheric chemistry at the global scale within computer models. The work programme presented involves the study of chemistry under conditions relevant to the polar regions and at higher altitudes in the atmosphere.