EVERYDAY SCIENCE

Detailed explanation-1: -Peak concentrations, an average of 8 molecules of ozone per million molecules in the atmosphere, occur between an altitude of 30 and 35 kilometers. Ozone in the stratosphere absorbs most of the ultraviolet radiation from the Sun.

Detailed explanation-2: -At this height the relation production/destruction is maximum. Photochemical and transport processes in the earth’s stratosphere are studied. The effects of trace constituents such as water vapor and nitrogen oxides on stratospheric ozone distribution are emphasized.

Detailed explanation-3: -The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth’s surface, in the stratosphere.

Detailed explanation-4: -Most ozone (about 90%) is found in the stratosphere, which begins about 10–16 kilometers (6–10 miles) above Earth’s surface and extends up to about 50 kilo-meters (31 miles) altitude. The stratospheric region with the highest ozone concentration is commonly known as the “ozone layer” (see Figure Q1-2).