The stratosphere is composed mainly of diatomic oxygen (O2) and ozone (O3) molecules. Ozone is particularly concentrated in a region known as the ozone layer, which lies within the lower portion of the stratosphere.

Temperature

Unlike the troposphere, where temperatures decrease with altitude, the stratosphere experiences an increase in temperature with altitude. This is due to the absorption of ultraviolet (UV) radiation by the ozone layer, which leads to the heating of the stratosphere.

Importance of the Ozone Layer

The ozone layer within the stratosphere plays a crucial role in protecting life on Earth by absorbing the majority of the Sun's harmful UV radiation. This shields living organisms from the harmful effects of excessive UV exposure, such as skin cancer, cataracts, and suppression of the immune system.

Study Guide

To better understand the stratosphere, here are some key study areas and potential questions to consider:

1. Ozone Depletion

- What causes the depletion of the ozone layer? - What are the consequences of ozone depletion for the Earth and its inhabitants?

2. Stratospheric Temperature Profile

- How does the temperature change with altitude in the stratosphere, and what causes this unique temperature profile? - What role does the absorption of UV radiation play in heating the stratosphere?