Layer of atmosphere which is not present over poles is Ozone. It is due to very cold temperature.
Over the polar regions.
Yes, the ozone layer is above the clouds. It's up in the lower stratosphere, about 12-19 miles (20-30 km) above Earth. There are very high polar clouds that are higher than this, but most clouds are in the troposphere where the highest clouds (in the polar regions) are about 2 - 5 miles (3 - 8 km) above Earth.
Well, they don't, actually. Hurricanes form in the more tropical regions, never the polar regions. Reason for that is basically there is more moisture in the atmosphere than in the polar regions. For a better explanation, please see the related question below.
Troposphere
Yes - though they encircle the whole planet, not just its polar regions.
stratospheric
Over the polar regions.
Yes, the thickness varies from te equatoral to the polar regions due to the Earth's rotation. The atmosphere is thicker at the equator than the poles. this is due to the earths rotation and centripital force.
Yes, the ozone layer is above the clouds. It's up in the lower stratosphere, about 12-19 miles (20-30 km) above Earth. There are very high polar clouds that are higher than this, but most clouds are in the troposphere where the highest clouds (in the polar regions) are about 2 - 5 miles (3 - 8 km) above Earth.
Ionosphere of Near northern hemisphere polar regions
Well, they don't, actually. Hurricanes form in the more tropical regions, never the polar regions. Reason for that is basically there is more moisture in the atmosphere than in the polar regions. For a better explanation, please see the related question below.
Troposphere
Polar regions are not actually devoid but have small concentrations of the ozone layer which is a protective layer present in the stratospheric region of earth and which helps in the absorption of the harmful UV radiations coming from the sun. The reason is a pretty obvious one that the CFC's which are used by the mankind for their good are carried towards the poles by polar stratospheric winds which in turn move in the stratospheric region due to the high pressure. These CFC's hinder the rate of formation of ozone thus causing depletion or what we mention as an "ozone hole".
Yes - though they encircle the whole planet, not just its polar regions.
The ozone layer does affect various parts of the world. The polar regions being the main among them.
Tropical regions are cooler , polar regions are colder
Both polar regions, the Arctic and the Antarctic, are characterized by extreme cold temperatures, ice sheets, and unique ecosystems adapted to the harsh conditions. They also experience long periods of darkness during winter and continuous daylight in summer due to their locations near the poles.