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.Know More
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.Learn more about Atmosphere
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.Full Answer >
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.Full Answer >
The ozone layer, which is part of the stratosphere, is comprised of the major atmospheric gases nitrogen, oxygen and argon, but also contains a significantly higher concentration of the trace gas ozone than the other layers of the atmosphere. The other trace gases include carbon dioxide, neon, helium, methane and the manmade chlorofluorocarbons, or CFCs. The CFCs reaching the stratosphere from the Earth's surface have become a cause for global concern because of the role they play in the chemical reaction that removes ozone from the atmosphere.Full Answer >
The ozone layer is important because it filters harmful ultraviolet radiation as it travels from the sun to the surface of the Earth. These ultraviolet rays can harm both plant and animal life. After observation of a depletion of the ozone layer from the addition of chlorofluorocarbons and other man-made chemicals, the Montreal Protocol was enacted on Jan. 1, 1989 as an attempt to eradicate these chemicals from the atmosphere.Full Answer >