Mesosfäärin

Mesosfäärin is a term that refers to the mesosphere, the third layer of Earth's atmosphere. It is located above the stratosphere and below the thermosphere. The mesosphere extends from an average altitude of about 50 kilometers (31 miles) to 85 kilometers (53 miles) above the Earth's surface. Temperatures in the mesosphere decrease with increasing altitude, reaching the coldest temperatures in Earth's atmosphere, often dropping below -90 degrees Celsius (-130 degrees Fahrenheit). This extreme cold is due to the limited absorption of solar radiation. The mesosphere is where most meteors burn up upon entering the atmosphere, creating the visible streaks of light known as shooting stars. It is also the region where noctilucent clouds, the highest clouds in Earth's atmosphere, can sometimes be observed. Due to its altitude and the lack of significant atmospheric phenomena like weather systems or auroras, the mesosphere is less studied than other atmospheric layers. Its composition is primarily nitrogen and oxygen, similar to the lower atmosphere, but with significantly lower density.