Post-Doctoral Fellowships Layers of the atmosphere The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about km above the Earth's surface is called the exosphere. The different layers of the atmosphere The atmosphere can be divided into layers based on its temperature, as shown in the figure below.
The ground is shown in brown at the bottom of the picture. The altitude in kilometers is given on the right hand scale and is approximate. Click for a larger image.
This is the lowest atmospheric layer and is about seven miles 11 km thick. Most clouds and weather are found in the troposphere. The troposphere is thinner at the poles averaging about 8km thick and thicker at the equator averaging about 16km thick.
The temperature decreases with altitude. In this region of the atmosphere is the ozone layer, which absorbs most of the harmful ultraviolet radiation from the Sun. The temperature increases slightly with altitude in the stratosphere. The highest temperature in this region is about 32 degrees Fahrenheit or 0 degrees Celsius.
The mesosphere is above the stratosphere. The thermosphere starts at about 55 kilometers. The temperature is quite hot; here temperature is not measured using a thermometer, but by looking at the motion and speed of the rarefied gases in this region, which are very energetic but would not affect a thermometer.
Temperatures in this region may be as high as thousands of degrees. The exosphere is the region beyond the thermosphere.
The ionosphere overlaps the other atmospheric layers, from above the Earth. These ionized layers affect the transmittance and reflectance of radio waves. This drawing shows the penetration of different kinds of electromagnetic radiation into the atmosphere.
Note also the different layers of the ionosphere D, E, F and the level at which auroras occur. Lightning can generate whistlers, radio waves that can travel long distances.
Very high frequency radio waves VHF can travel through the atmosphere to and from satellites and are used for communication. The airglow is due to a chemical reaction in the upper atmosphere that emits light.
Many radio waves are reflected at night by the ionosphere making it possible to hear AM radio and shortwave radio stations that are far away. Gamma rays and x-rays are absorbed by the upper atmosphere; visible light can penetrate to sea level.
Many infrared wavelengths can also pass through the atmosphere. Related to chapter 3 in the print guide. See Scientific Ballooning to learn how scientists use balloons for research.
Click for the definitions of the following words that are used on this page: Definitions appear in a pop-up window.The atmosphere of Earth is the layer of gases, Excluding the exosphere, the atmosphere has four primary layers, which are the troposphere, stratosphere, mesosphere, and thermosphere.
From highest to lowest, the five main layers are: Exosphere: to 10, km ( to 6, miles) Thermosphere: 80 to km (50 to miles). Aug 07, · Earth's Atmospheric Layers. Diagram of the layers within Earth's atmosphere.
Troposphere The troposphere starts at the Earth's surface and extends 8 to kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region. An atmosphere (from Greek ἀτμός (atmos), meaning 'vapour', and σφαῖρα (sphaira), meaning 'sphere') 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 more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is low. The atmosphere is a protective layer of gasses that shelters all life on Earth, keeping temperatures within a relatively small range and blocking out harmful rays of sunlight.
The atmosphere has five different layers that are determined by the changes in temperature that happen with increasing altitude. The atmosphere is comprised of layers based on temperature.
These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about km above the Earth's surface is called the exosphere. Layers of the Earth's Atmosphere The atmosphere is divided into five layers.
It is thickest near the surface and thins out with height until it eventually merges with space. 1) The troposphere is the first layer above the surface and contains half of the Earth's atmosphere.