GGR112H5 Lecture Notes - Lecture 2: Tropopause, Longwave, Radiography
Document Summary
Ggr112 lecture 4 earth"s modern atmosphere. 99. 9% of the atmosphere"s mass occurs below 50 km altitude (above surface) The atmosphere stretches to 480 km above earth"s surface: the area past the earth"s atmosphere is called exosphere (outer space) The atmosphere can be divided into shells: composition, temperature, function. Each layer is called a -sphere (troposphere) The upper area of each layer called -pause (stratopause) Composition (2 spheres: homosphere (0-80 km) Gases are all blended except for ozone (o3) from 19-50 km: and heterosphere (80-480 km) Layers of gases is sorted by gravity in terms of its mass. Temperature (4 spheres: mesosphere, troposphere, stratosphere, thermosphere. Function (2 spheres: ionosphere and ozonosphere. Much of the atmosphere"s mass (99. 99%) is below 80 km. Rising carbon dioxide levels in ocean: the ph scale in the ocean is critical to aquatic life, lower ph can dissolve organisms like coral, shellfish and phytoplankton. Troposphere (0-18 km: 90% atmospheric mass, tropopause at -57 degrees celsius, different altitudes.
