PUBHLTH 167 Lecture Notes - Lecture 2: Main Source, Hadley Cell, Thermosphere

• School: UC-Irvine
• Department: Public Health
• Course: PUBHLTH 167
• Professor: Rufus Edwards

Document Summary

Nitrogen levels from before vs now = similar to now. Prokaryotic cells = o2 free oxygen, allowed eukaryotic cells to develop, ozone layer developed bc of photosynthesis. Thermosphere temp increases bc of absorption of uv by n2 mlc, solar wind. Troposphere main source of heat = solar radiation (damn it) Venus with co2 atm = hot water vapor, never reached saturation never rained, most active greenhouse gas; caused enhanced greenhouse effect; uv rays broke apart water vapor mlc which escape to space. Mars with co2 atm = small atm, further from sun, less water vapor from sun, greenhouse effect not enough, water escaped to space and temp got lower, no surface water (ice crystals sub surface) Weather goes up to 12km; 1000 millibars pressure @ surface, 80% at troposphere = 20 millibars. Polar cell, ferrel cell, hadley cell = from pole to equator. 1285 don"t burn coal either 700 yrs to eliminate coal burning in england.