In Situ Measurements of Polar Stratospheric Clouds and Condensation Nuclei in the Arctic Stratosphere in Conjunction with Simultaneous Measurements of the HNO3

该项目将建造和飞行气球仪器，用于测量北极平流层中发现的粒子的大小和其他特征。这些凝聚核(CN)和极地平流层云(PSC)粒子在氯的催化作用下破坏臭氧起着重要作用。气球测量将与来自德国海德堡马克斯·普朗克研究所的另一个团队进行硝酸(HNO3)蒸气测量的同时进行。硝酸是PSC颗粒的主要成分之一。这项工作对于增进对导致两极地区臭氧每年春季减少的过程的理解，以及帮助理解北极和南极平流层之间的差异具有重要意义。

This project will build and fly on balloons instruments for measuring the size and other characteristics of particles found in the arctic stratosphere. These condensation nuclei (CN) and polar stratospheric cloud (PSC) particles play an important role in the destruction of ozone by catalytic action of chlorine. The balloon measurements will be made at the same time as nitric acid (HNO3) vapor measurements will be made by another team from Max Planck Institute, Heidelberg, Germany. Nitric acid is one of the main constituents of the PSC particles. This work is important to increasing understanding of the processes which cause the annual springtime decreases of ozone in both polar regions, and also to help understand the differences between the Arctic and Antarctic stratosphere.