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“Good ozone” is found in the
(a) Mesosphere
(b) Troposphere
(c) Stratosphere
(d) Ionosphere

Last updated date: 20th Jun 2024
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Hint: This is the second layer of atmosphere extending about 10 km upwards from earth’s surface and where at the lower portion ozone is found. This layer is very stable for flying jet planes.

Complete step by step answer:
The ozone layer is situated within the lower portion of the stratosphere, from approximately 20 to 30 kilometres above Earth, in which the thickness varies seasonally and geographically.
Ozone is relatively abundant within the stratosphere, which is a warm layer because it absorbs energy from incoming ultraviolet from the Sun. Temperatures rise together and move upward through the stratosphere. There is little convection and mixing within the stratosphere, therefore the layers of ozone are in fitness and that they are quite stable.
So, the correct answer is, ‘stratosphere.’

Additional information:
- This layer is stratified in temperature, with warmer layers above and cooler layers farther down.
- The top of the stratosphere features a temperature of about −3 degree celsius just slightly below the melting point of water.
- Methane, while not an immediate cause for ozone destruction within the stratosphere, does cause the formation of compounds that destroy ozone.
- Bacterial life survives within the stratosphere, making it a neighbourhood of the biosphere.
- In 2001 an Indian experiment, involving a high- altitude balloon, was administered at a height of 41 kilometres and a sample of dust was collected with bacterial material inside.
- Some bird species are reported to fly at the lower levels of the stratosphere.

- Polar stratospheric clouds also referred to as nacreous clouds, are clouds within the winter polar stratosphere.
- They are best observed during civil twilight when the sun is between $1^\circ$ and $6^\circ$ below the horizon also as in winter and in additional northerly latitudes. They are implicated within the formation of ozone holes.
- The effects on ozone depletion arise because they support chemical reactions that produce active chlorine which catalyzes ozone destruction, and also because they remove gaseous aqua fortis, perturbing nitrogen and chlorine cycles during a way which increases ozone destruction.