Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
When the polar vortex slows, this region can undergo sudden warming. This layer is subject to the quasi-biennial oscillation. The distribution of water and another substance in this layer and an associated sublayer are explained by the Brewer-Dobson circulation. Like the thermosphere, its temperature increases with altitude. This layer contains the ozone layer. Its bottom boundary is called the tropopause, below which is the troposphere. For 10 points, name this second layer of the atmosphere.
A:
Science