EESA09H3 Study Guide - Volumetric Heat Capacity, Hadley Cell, Coriolis Force
15 Dec 2012
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Document Summary
Atmospheric composition largely the results of volcanic emissions (geologic control) co2 and ch4. Life appeared 3. 8b years ago: 2. 3b years of methane, carbon dioxide in the atmosphere. Aerobic conditions, age of bacteria: abrupt change 2. 3b years ago. Oxygen makes an appearance in the atmosphere and stabilizes at 21% Aerobic life forms appear and flourish ( biologic control) Biologic control: basic premise is that life modifies the environment to best suit itself, 21% o2 is optimum for life, mars and venus are in a static equilibrium with high levels of co2 and ch4. Anthropogenic control: during the carboniferous period (360-390m years ago) during the paleozoic. Sun"s energy converted to plant material (photosynthesis) Converted to coal and oil under geologic pressure. Many of today"s air quality problems arise from the release of this stored energy: coal. First major anthropogenic modification of the atmosphere. Britain industrial revolution 19th century.
