Air layer {troposphere} next to surface has 3/4 of all air and has all clouds, dust, wind, and storms. Surface pressure is 15 lb/in^2. Average surface temperature is 63 F. At troposphere top, temperature is -60 F to -100 F. Troposphere is 78% nitrogen, 21% oxygen, 2% average water vapor, 0.9% argon, and 0.03% carbon dioxide. On hot humid days, water vapor can be 3% or 4%.
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5-Earth Science-Atmosphere-Layers
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Date Modified: 2022.0224