The weather helps to break up a pattern of strong, cold winds called the circum polar vortex. 这样的气候有助于打破一个被称作环极涡旋的强盛的寒冷风场。
If the circumpolar vortex lasts longer than usual in future years, a large ozone hole could be expected to develop above the Arctic. 如果环极涡旋在未来几年里比正常情况下持续更长时间，一个大规模的臭氧空洞就很可能在北极上空发展起来。
