Q:

What determines the temperature of atmospheric layers?

A:

Quick Answer

The temperature of atmospheric layers is determined by air composition, movement, and density of each layer. In the troposphere, for example, it is warmer at the base layer because the air absorbs heat from the earth's surface. Because air density decreases with height, temperature also decreases.

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Full Answer

In the stratosphere, the amount of water vapor decreases while ozone concentration increases with height. This brings about an increase in temperature because ozone formation produces heat and the ozone molecules absorb the ultraviolet rays of the sun.

Moving upward from the stratosphere to the mesosphere, oxygen molecules become less dense, and so the warm temperature begins to drop again with the increase in altitude. The temperature is coldest in this layer; it reaches -90 to -120 degrees Celsius.

In the thermosphere, temperature goes up to 2,000 degrees Celsius with the increase in altitude because molecules absorb high-intensity x-ray and ultraviolet rays from the sun. Surprisingly, air temperature in this layer feels cold to the skin because air density is very low. Astronauts in space prefer to stay in orbit in this layer. Air in the exosphere is too thin to warm up and the molecules escape to outer space. The temperature in some parts of space can be very hot, however, because of the solar wind.

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Related Questions

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    Does atmospheric pressure increase or decrease with higher altitude?

    A:

    Atmospheric pressure decreases as altitude increases. High altitudes contain less air molecules, resulting in lower air density, decreased temperatures and lower air pressure. High altitudes are typically found above sea level.

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    What are the layers of the atmosphere?

    A:

    The layers of the atmosphere are the exosphere, thermosphere, mesosphere, stratosphere and troposphere. The troposphere is the layer that is closest to the surface of the Earth, whereas the exosphere is the furthest layer from Earth's surface and the closest layer to outer space.

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    What is the ozone layer made of?

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    What does the ozone layer do?

    A:

    The ozone layer, also called the stratosphere, has a primary function of absorbing ultraviolet sunlight. The absorption of ultraviolet rays has many effects, such as atmospheric temperature regulation and protection of biological entities.

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