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In the troposphere, however, the air is thinner, thereby making commercial flights more fuel efficient. A visualization of the Northern Hemisphere's polar jet stream swirling weather patterns from west to east across North America. An Introduction to the Airbus A We mainly find the ozone layer in the lower parts of the stratosphere, although this varies depending on the geographical location. What Color Is Lightning? The Mesosphere Layer 3.

Many military aircraft are designed with larger wings than commercial jets, allowing them to produce more lift from less air.

These military aircraft are able to fly above the troposphere while producing an adequate amount of lift from the otherwise thin air. For these reasons, commercial jets almost always fly in the troposphere. An Introduction to the Airbus A Aerospace Engineering. There, the stratosphere begins at heights of just 23, feet. The temperatures in the stratosphere vary greatly but are always much colder than the surface of our planet.

However, the temperatures in this layer are known to vary greatly depending on the season we are in. During the winter, they can get extremely low. The winds blowing in the stratosphere are much stronger than those in the troposphere. They can reach speeds of up to miles per hour. The stratosphere is the layer of the atmosphere where we can find the ozone layer.

The ozone layer forms when molecular oxygen absorbs the extremely high amounts of energy coming from the Sun. This happens at wavelengths that are shorter than nanometers. When the oxygen molecules split, they produce radicals that combine with molecular oxygen and then form ozone. Ozone gets photolyzed faster than molecular oxygen. It also has a stronger absorption because of the more intense solar emission at its wavelengths.

The ozone layer is also known as the ozone shield, and it absorbs the majority of the ultraviolet radiation coming from the Sun. After all, if air gets thinner at higher altitudes, conventional wisdom may lead you to believe that flying in the stratosphere would provide even greater fuel efficiency benefits than flying in the troposphere.

Well, the problem with flying above the troposphere is that the air is too thin to produce any substantial amount of lift for commercial jets. Of course, there are exceptions, such as military aircraft. Many military aircraft are designed with larger wings than commercial jets, allowing them to produce more lift from less air. These military aircraft are able to fly above the troposphere while producing an adequate amount of lift from the otherwise thin air. For these reasons, commercial jets almost always fly in the troposphere.

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