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An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body. An atmosphere is.
Table of contents
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- The atmosphere
- The Earth's atmosphere and gaseous envelope - Encyclopédie de l'environnement
- Layers of the atmosphere
In this layer the temperature increases with height.
This is because the stratosphere houses the ozone layer. The ozone layer is warm because it absorbs ultraviolet UV rays from the sun. The mesosphere is the layer above the stratosphere. The temperature decreases with height here just like it does in the troposphere. This layer also contains ratios of nitrogen and oxygen similar to the troposphere, except the concentrations are times less and there is little water vapor there, so the air is too thin for weather to occur. The thermosphere is the uppermost layer of the atmosphere.
In this layer the temperature increases with height because it is being directly heated by the sun. The molecules that make up the atmosphere are pulled close to the earth's surface by gravity. This causes the atmosphere to be concentrated at the Earth's surface and thin rapidly with height. Air pressure is a measure of the weight of the molecules above you.
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- Layers of Earth's Atmosphere?
As you move up in the atmosphere there are fewer molecules above you, so the air pressure is lower. Figure B shows how pressure decreases with height. The black dotted lines show how much of the atmosphere is below you at a certain level. It is no surprise that most climbers use oxygen tanks when they climb Mt. Temperature vs. Height and Pressure of the Troposphere Figure C.
Temperature decreases with height in the troposphere. This is true for a couple different reasons.
First, even though the sun's energy comes down from the sky, it is mostly absorbed by the ground. The ground is constantly releasing this energy, as heat in infrared light, so the troposphere is actually heated from the ground up, causing it to be warmer near the surface and cooler higher up. Another reason is the decreasing air pressure with height. If the warm air at the surface gets blown upward into the cooler air above it, the surface air will continue to rise.
Temperature rises within the stratosphere but still remains well below freezing. Temperatures in the mesosphere reach a low of degrees Fahrenheit C. This layer is difficult to study directly; weather balloons can't reach it, and weather satellites orbit above it. The stratosphere and the mesosphere are known as the middle atmospheres.
The Earth's atmosphere and gaseous envelope - Encyclopédie de l'environnement
Temperature increases with height and can rise to as high as 3, degrees Fahrenheit C. Nonetheless, the air would feel cold because the hot molecules are so far apart.
This layer is known as the upper atmosphere, and it is where the auroras occur northern and southern lights. Extending from the top of the thermosphere to 6, miles 10, km above Earth is the exosphere , where weather satellites are. This layer has very few atmospheric molecules, which can escape into space.
Layers of the atmosphere
Some scientists disagree that the exosphere is a part of the atmosphere and instead classify it actually as a part of outer space. There is no clear upper boundary, as in other layers.
Between each layer of the atmosphere is a boundary. Above the troposphere is the tropopause, above the stratosphere is the stratopause, above the mesosphere is the mesopause, and above the thermosphere is the thermopause. At these "pauses," maximum change between the "spheres" occur. The ionosphere isn't actually a layer of the atmosphere but regions in the layers where there are ionized particles electrically charged ions and free electrons , especially located in the mesosphere and thermosphere.
The altitude of the ionosphere's layers changes during the day and from one season to another.
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