EARTHSS 23 Lecture 8: ESS23 Lecture 13,14,15,16
10 Mar 2017
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Document Summary
Good ozone vs bad ozone: good up high, bad nearby. The structure of the atmosphere: sea level, troposphere, tropopause, stratosphere, stratopause, mesosphere, mesopause, thermosphere, exosphere. Increase in vibrational frequency of a given bond: rotational transition: far-ir (20-100) Increase in angular momentum around rotation axis: gases that absorb radiation near the spectral max of terrestrial emission (10) are called greenhouse gases, vibrational or vibrational-rotational transition. Carbon dioxide does not produce ozone in the troposphere (air we breathe) Dobson unit column of ozone = 2. 7 * 1016 molecules per centimeter squared at 273k and 1 atm. Cfc: chlorofluorocarbons, freons: threat to ozone layer, derived from carbon tetrachloride or methane. Increased severe-weather events: higher average globally-averaged surface temperature, loss of ice and snow/rise in sea-level, greater regional extremes in temperature, precipitation, shifts in agriculture/loss of fruit crops, ocean acidification/loss of coral reefs. Increase in air pollution and air pollution mortality.
