Atmospheric structure
Atmospheric Structure
The atmosphere The atmosphere is a thin blanket of gas that envelops the earth The gases that make up the atmosphere are held close to the earth by the pull of gravity With increasing distance from the earth's surface, the temperature, density, and composition of the atmosphere gradually change On the basis of air temperature, the atmosphere can be divided vertically into four major layers
The atmosphere • The atmosphere is a thin blanket of gas that envelops the earth. • The gases that make up the atmosphere are held close to the earth by the pull of gravity. • With increasing distance from the earth’s surface, the temperature, density, and composition of the atmosphere gradually change • On the basis of air temperature, the atmosphere can be divided vertically into four major layers
Atmospheric structure 300 200 Thermosphere Mesopause ionosphere Mesosphere Stratopause Ozone 40 Stratosphere Lay Tropopause 20 Troposphere -100 0 5 100 Temperature (oC)
Atmospheric structure
Troposphere The troposphere is the layer from the earths surface to the tropopause, which is at 10-15 km altitude depending on latitude and time of year( Mt Everest 8.85km) As altitude increases air temperature decreases at a rate of about 3.5 per 1000 ft. The tropopause has a temperature of about -57oC The lower part of the troposphere interacts directly with the surface of the earth-this part of the troposphere is generally called air. The atmosphere in this layer is heated from below by convection and radiation from the earth s surface Most of our weather occurs in the troposphere
Troposphere • The troposphere is the layer from the earth’s surface to the tropopause, which is at 10-15 km altitude depending on latitude and time of year. (Mt. Everest 8.85km) • As altitude increases, air temperature decreases at a rate of about 3.5o per 1000 ft. The tropopause has a temperature of about –57oC. • The lower part of the troposphere interacts directly with the surface of the earth–this part of the troposphere is generally called air. • The atmosphere in this layer is heated from below by convection and radiation from the earth’s surface. • Most of our weather occurs in the troposphere
Stratosphere The stratosphere is the layer above the troposphere and extends to about 50km The temperature rises with increasing altitude, reaching a maximum of about -1C at the stratopause The ozone layer is in the stratosphere. Ozone absorbs Uv, causing the rising temperature with altitude in this layer The temperature structure keeps the air calm in this layer. (That's why jet aircraft fly in the lower stratosphere
Stratosphere • The stratosphere is the layer above the troposphere and extends to about 50km. • The temperature rises with increasing altitude, reaching a maximum of about –1 oC at the stratopause. • The ozone layer is in the stratosphere. Ozone absorbs UV, causing the rising temperature with altitude in this layer. • The temperature structure keeps the air calm in this layer. (That’s why jet aircraft fly in the lower stratosphere!)