GEOG 2110L Lecture Notes - Water Vapor, Climatology, Lapse Rate
17 Mar 2014
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*** the statistical properties of the atmosphere, including measures of the average conditions, variability, etc. ** the state or condition of the atmosphere at a particular time and place. **comprised of various factors: air pressure, air temperature, humidity, clouds, precipitation, wind, visibility, etc. ** a sum of the daily and seasonal weather events over decades of years (average of these factors) 4. 5 bya 3 - 1. 5 bya . 5 bya. B: earth cooled and gases accumulate; atmosphere comprised of carbon dioxide, nitrogen and methane, but no oxygen or ozone. C: o2 generating aquatic organisms evolved, oxygen supply slowly rises. D: green plants widespread; atmosphere takes on present conditions; ozone levels increase and spread. ** main process for increased oxygen levels is photosynthesis. ** a mixture of discrete gases with solid and liquid particles suspended in it ** some components are fairly stable while others vary spatially and temporally. ** constant gases (found in same proportions within lower atmosphere)
