Stratosphere Study Guide

1. Characteristics of the Stratosphere:

The stratosphere is characterized by:

• Stable atmospheric conditions
• Presence of the ozone layer
• Dry and thin air
• Increasing temperature with altitude due to the absorption of UV radiation by the ozone

2. Ozone Layer:

The ozone layer is a region within the stratosphere that contains a high concentration of ozone (O3) molecules. It plays a critical role in:

• Absorbing and filtering out the majority of the sun's harmful UV radiation
• Protecting living organisms on Earth from the damaging effects of UV radiation

3. Importance of the Stratosphere:

The stratosphere is important because:

• It shields the Earth from harmful UV radiation, which can cause skin cancer, cataracts, and other health issues
• It helps maintain stable atmospheric conditions, which is crucial for air travel and communication systems
• It plays a role in regulating the Earth's overall climate and temperature

4. Human Impact:

Human activities, such as the release of certain chemicals (e.g., chlorofluorocarbons or CFCs) into the atmosphere, have led to the depletion of the ozone layer, resulting in an increase in UV radiation reaching the Earth's surface. This has prompted international efforts to reduce the use of ozone-depleting substances and protect the ozone layer.

5. Fun Fact:

The stratosphere is where commercial jets and some specialized aircraft fly, taking advantage of the stable conditions and lower air turbulence for smoother flights.

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