GG101 Lecture Notes - Lecture 6: Ozone Layer, Axial Tilt, Mixed Layer
Document Summary
Read the end of chapter 2 (axial tilt) Atmosphere the gaseous envelope that surrounds the earth. A mixture of gases and suspended liquids and solids. Liquids and solids (but not water or ice) that are suspended in the atmosphere. As we move upwards the density (mass per volume) decreases and the pressure decreases. Pressure is a force applied per unit area. Force equals the product of mass and acceleration due to gravity. At any point in the atmosphere pressure is simply the weight of the overlying atmospheric components. On the basis of temperature there are four layers. 80-85% of the mass of the atmosphere. As we move through the troposphere the temperature decreases, but cold air cannot. Limited circulation between the troposphere and stratosphere move into warmer air (unless there is a volcanic eruption) Above the troposphere there us the ionosphere and ozonosphere. The ozonosphere (stratosphere) absorbs the ultra violet radiation.
