Understanding the Ozone Layer: Threats and Monitoring

The video discusses the thinning of the ozone layer, which absorbs harmful UV radiation. It explains how polar vortexes and ice crystals contribute to ozone depletion, particularly due to chlorofluorocarbons (CFCs). Surface-level ozone, formed by pollutants, can harm respiratory health. The Netherlands Royal Institute of Meteorology monitors the ozone layer, which is under threat from CFCs, especially over Antarctica. Satellite data shows the ozone hole's size and changes. Despite reduced CFC use, the ozone hole persists due to chlorine atoms' destructive capacity.

What role does the ozone layer play in protecting life on Earth?

• It provides oxygen for marine life.

• It traps greenhouse gases in the atmosphere.

• It reflects visible light back into space.

• It absorbs harmful ultraviolet radiation from the sun.

How do high-level ice crystals contribute to ozone depletion?

• They reflect sunlight, reducing ozone formation.

• They trap heat, increasing ozone breakdown.

• They aid CFCs in destroying ozone.

• They absorb ozone, reducing its concentration.

Why is the ozone hole more pronounced over Antarctica?

• Because Antarctica receives more sunlight.

• Because of the unique atmospheric conditions that trap CFCs.

• Due to higher levels of pollution in the region.

• Due to volcanic activity in the area.

What is the role of the European satellite Envisat in ozone monitoring?

• It observes the growth of polar ice caps.

• It monitors the state of the ozone layer.

• It tracks the movement of ocean currents.

• It measures the temperature of the Earth's surface.

What happens when CFCs reach the upper atmosphere?

• They break down, releasing chlorine atoms.

• They are absorbed by clouds.

• They form new ozone molecules.

• They become inert and harmless.