The stratosphere gets its name because it is stratified, or layered: as elevation increases, the stratosphere gets warmer. The stratosphere increases in warmth with elevation because ozone gases in the upper layers absorb intense ultraviolet radiation from the sun. Heat is produced in the process of the formation of Ozone and this heat is responsible for temperature increases from an average -60°F (-51°C) at tropopause to a maximum of about 5°F (-15°C) at the top of the stratosphere. This increase in temperature with height means warmer air is located above cooler air.When UV-C light reaches the stratosphere; it is completely absorbed by oxygen molecules and never reaches the Earth's surface. UV-C splits oxygen molecules into oxygen atoms. These single atoms then react with other oxygen molecules to produce ozone. So, these reactions increase the amount of ozone in the stratosphere.

There is a relationship between latitude and temperature around the world, as temperatures are typically warmer approaching the Equator and cooler approaching the Poles. There are variations, though, as other factors such as elevation, ocean currents, and precipitation affect climate patterns. Because the angle of radiation varies depending on the latitude, surface temperatures on average are warmer at lower latitudes and cooler at higher latitudes. Higher the angle of incidence, higher is the temperature. Similarly, lower the angle of incidence, lower is the temperature. This is why the temperature is higher near the tropical regions and decreases towards the poles. At higher latitudes, the Sun's rays are less direct. The farther an area is from the equator, the lower its temperature. At the poles, the Sun's rays are least direct. Much of the area is covered with ice and snow, which reflect a lot of sunlight. Latitude is the most important climatic control, due to the effect is has on the amount of solar radiation reaching the Earth's surface. The seasonal changes in incoming solar radiation, as well as the length of the day, vary with latitude. The results show that temperature variations not only depend on altitude but also latitude, and there is a gradual decrease in temperature with the increasing altitude and latitude. The overall trend for the vertical temperature lapse rate for the whole plateau is approximately linear. The heat of the sun is more in low latitudes in the high latitudes. The sun's rays fall perpendicularly over the equatorial region throughout the year while they fall in inclined direction over the polar areas. As a result, the equatorial region is much warmer than the polar region.

Ozone is also formed at the surface of the Earth! But in small concentrations.

Dr Mikhail Samokhvalov thank you for your contribution to the discussion

Ozone is naturally produced in the stratosphere in a two-step process. In the first step, ultraviolet sunlight breaks apart an oxygen molecule to form two separate oxygen atoms. In the second step, each atom then undergoes a binding collision with another oxygen molecule to form an ozone molecule. The higher up in the atmosphere you go, the thinner the air is, and thus the less oxygen there is to absorb the 180-240 nm ultraviolet to form ozone. On the other hand, at very low levels in the atmosphere there is plenty of O2but very little UV. It's only in the stratosphere that there is enough of both UV and O2 to make plenty of ozone. In the stratosphere, the process begins with an oxygen molecule being broken apart by ultraviolet radiation from the Sun. In the lower atmosphere (troposphere), ozone is formed by a different set of chemical reactions that involve naturally occurring gases and those from pollution sources. Unlike stratospheric ozone, which forms naturally in the upper atmosphere and protects us from the sun's harmful ultraviolet rays, ground-level ozone is created through the interactions of man-made emissions of volatile organic compounds and nitrogen oxides in the presence of heat. When exposed to sunlight, VOCs and nitrogen oxides react to form ground-level ozone. As a result, ozone concentrations are typically higher in the summer months when there is plenty of solar radiation to stimulate the reactions. The stratosphere is where you'll find the very important ozone layer. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection. Heat is produced in the process of the formation of Ozone and this heat is responsible for temperature increases from an average -60°F (-51°C) at tropopause to a maximum of about 5°F (-15°C) at the top of the stratosphere. This increase in temperature with height means warmer air is located above cooler air. Temperature decreases with height, reaching a minimum average value of -90 ºC at the top of the layer. The upper part of the mesosphere contains part of the ionosphere, an electrified region. Atmospheric ozone has two effects on the temperature balance of the Earth. It absorbs solar ultraviolet radiation, which heats the stratosphere. It also absorbs infrared radiation emitted by the Earth's surface, effectively trapping heat in the troposphere. Temperature increases with ozone concentration. Solar energy is converted to kinetic energy when ozone molecules absorb ultraviolet radiation, resulting in heating of the stratosphere. The ozone layer is centered at an altitude between 10-15 miles (15-25 km).