EESA01H3 Lecture Notes - Lecture 10: Tropospheric Ozone, Ultraviolet, Tropopause
29 Dec 2019
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Document Summary
It extends above the tropopause to an altitude of about 30 miles (50 km) above the planet"s surface: mesosphere - a layer extending from approximately. 30 to 50 miles (50 to 85 km) above the surface, is characterized by decreasing temperatures: thermosphere - located above the mesosphere. The temperature in the thermosphere generally increases with altitude reaching 600 to 3000 f (600-2000 k) depending on solar activity: ozone layer - centered at an altitude between 10-15 miles (15-25 km). Approximately 90 % of the ozone in the atmosphere resides in the stratosphere: ozone absorbs the bulk of solar ultraviolet radiation. Vertical mixing: temperature trends in and between atmospheric layers control mixing , some deviations possible from previous figure (fig. Air pollution: natural sources, wind/dust storms from arid regions, volcanic eruptions particulates, so2, gases; eyjafjallajokull (iceland) eruption 2010, forest fires soot, co2, anthropogenic sources (lots, factories (stacks, power plants, automobiles.
