CHEM 302 Chapter 10: Chapter 10.pdf
Document Summary
The stratospheric ozone layer, centered at about 20 km above the surface of the earth (figure 10-1), protects life on earth by absorbing uv radiation from the sun. In this chapter we examine the mechanisms controlling the abundance of ozone in the stratosphere and the effect of human influence. 10 m k e d u t i t l. Figure 10-1 the natural ozone layer: vertical and latitudinal distribution of the ozone number density (1012 molecules cm-3) at the equinox, based on measurements taken in the 1960s. The presence of a high-altitude ozone layer in the atmosphere was first determined in the 1920s from observations of the solar uv spectrum. A theory for the origin of this ozone layer was proposed in 1930 by a british scientist, sydney chapman, and is known as the. Chapman mechanism. current understanding of stratospheric ozone. foundation for. 10. 1. 1 the mechanism the ozone layer originates from the.
