As such, temperatures increase as one descends, rising to about 5☏ (-15☌) near the bottom of this layer. The gases that comprise this layer continue to become denser as one descends. This layer extends from around 31 miles (50 km) above the Earth's surface to 53 miles (85 km). The bottom of the thermosphere is the mesopause - the transition into the mesosphere. Take it to the MAX! The Ionosphere: The Outer Edges of the Atmosphere The high temperature indicates the amount of the energy absorbed by the molecules, but with so few molecules in this layer, the total number would not be enough to heat our skin. However, despite the high temperature, this layer of the atmosphere would still feel very cold to our skin. From as low as -184 ☏ (-120 ☌) at the bottom of this layer, temperatures can reach as high as 3,600☏ (2,000☌) near the top. While still extremely thin, the gases of the thermosphere become increasingly denser as one descends toward the Earth.Īs such, incoming high energy ultraviolet and x-ray radiation from the sun begins to be absorbed by the molecules in this layer and causes a large temperature increase.īecause of this absorption, the temperature increases with height. Thermosphereīetween about 53 miles (85 km) and 375 miles (600 km) lies the thermosphere, known as the upper atmosphere. At the bottom of the exosphere is a transition layer called the thermopause. In this layer, atoms and molecules escape into space and satellites orbit the earth. It extends from about 375 miles (600 km) to 6,200 miles (10,000 km) above the earth. This is the outermost layer of the atmosphere. Tsunami Preparedness and Mitigation: Individuals (You!).Preparedness and Mitigation: Communities.The Positive and Negative Side of Lightning.
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