Loading your learn pack…
Read the summary, then start training!
The ozone layer is a stratospheric region with elevated ozone that absorbs most harmful UV radiation from the Sun.
The ozone layer (or ozone shield) is a region of Earth’s stratosphere that contains a relatively high concentration of ozone (O3) and absorbs most of the Sun’s ultraviolet (UV) radiation. Although ozone is only a small fraction of atmospheric gases, it peaks at roughly 8–15 parts per million and is crucial for protecting life by blocking biologically harmful UV, especially UV-B (about 280–315 nm). The ozone layer was discovered in 1913 by French physicists Charles Fabry and Henri Buisson, and later monitored using instruments such as the Dobsonmeter developed by G. M. B. Dobson. In terms of location, the ozone layer is mainly in the lower stratosphere, roughly 15–35 km (about 9–22 miles) above Earth, with thickness that varies seasonally and geographically. Ozone concentrations are generally greatest between about 20 and 40 km, and the layer is thinner near the equator and thicker near the poles. Ozone is produced through photochemical reactions: UV light splits oxygen molecules (O2) into atomic oxygen, which then combines with O2 to form ozone; ozone is also continuously broken down by UV in the ozone–oxygen cycle. The layer can be depleted by catalytic reactions involving chlorine and bromine radicals released from human-made compounds such as CFCs, leading to phenomena like the seasonal “ozone holes,” most pronounced over the poles.
The ozone layer is a stratospheric region with elevated ozone that absorbs most harmful UV radiation from the Sun.
It is mainly located about 15–35 km above Earth (lower stratosphere), with ozone typically highest around 20–40 km.
Ozone forms and is destroyed through the ozone–oxygen cycle driven by UV photochemistry.
Human-made chlorine- and bromine-containing compounds can catalytically deplete ozone, producing seasonal polar thinning (“ozone holes”).
A stratospheric region enriched in ozone (O3) that absorbs most of the Sun’s ultraviolet radiation.
The atmospheric layer above the troposphere where the ozone layer is primarily located.
The continuous set of reactions in which UV light splits oxygen and ozone, maintaining ozone levels in the stratosphere.
Ultraviolet radiation (approximately 280–315 nm) that is largely blocked by the ozone layer and can cause sunburn and other biological harm.
A seasonal area of significantly reduced ozone concentration (thinner ozone layer) over the polar regions, especially the Antarctic.
“Can you explain what "The ozone layer is a stratospheric region with elevated ozone that absorbs most harmful UV radiation from the Sun." means in simple terms?”