The tropopause is the boundary region between the troposphere and the stratosphere. The tropopause is the boundary in the Earth's atmosphere between the troposphere and the stratosphere. Ozone exists naturally in the stratosphere, not the troposphere. Space weather is distinct from terrestrial weather of the troposphere and stratosphere. The reaction occurs in the troposphere or stratosphere. The border between the troposphere and stratosphere, the tropopause, marks where this temperature inversion begins. Atop the troposphere is the tropopause, which is the border between the troposphere and stratosphere. However, CFCs are well mixed globally in the troposphere and stratosphere. They are seen in the Earth's homosphere, which includes the troposphere, stratosphere, and mesosphere. Ozone acts as a greenhouse gas in the lowest layer of the atmosphere, the troposphere. Nitrous acid is involved in the ozone budget of the lower atmosphere, the troposphere. These altitudes are in the layer where weather occurs, the troposphere. Surplus heating and vertical expansion of the troposphere occurs in the tropics. The temperature of the troposphere generally decreases as altitude increases. They are believed to be due mainly to moist convection within Jupiter's troposphere.