In fact, this warming is caused by ozone absorbing ultraviolet radiation. Warm air remains in the upper stratosphere, and cool air remains lower, so there is much less vertical mixing in this region than in the troposphere. The troposphere extends from the surface up to about 10 km in altitude, although this height varies with latitude. Almost all weather takes place in the troposphere. Mt. Everest, the highest mountain on Earth, is only 8.8 km high.
Temperatures decrease with altitude in the troposphere.
This process, known as convection, means there are large air movements that mix the troposphere very efficiently. UVA is not absorbed by ozone . UVB is mostly absorbed by ozone, although some reaches the Earth. UVC is completely absorbed by ozone. This band of radiation has wavelengths just shorter than visible violet light.