29th Sept - Global climates & biomes - what factors control...

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Global climates & biomes - what factors control climate around the globe? - At high latitudes, sunlight must pass through more atmosphere, and thus loses more of its energy than in the tropics - At high latitudes, a given amount of solar energy is spread over a larger surface area than at the equator. - Sunlight strikes the earth at a perpendicular angle at the equator, but at an oblique angle at the poles. The albedo = % reflected Earth’s average = 30% Poles: outgoing energy deficit at the poles. Equator: energy excess flows towards the poles in order to equalize the energy Net radiation is the difference between incoming and outgoing radiation. Air: 1. density – less dense air rises, denser air sinks 2. water vapor capacity – warm air has a higher capacity for water vapor than cold air 3. adiabatic heating or cooling – as air rises in the atmosphere it expands and cools. Conversely, as air sinks, it decreases in volume and heats. 4.
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This note was uploaded on 01/17/2012 for the course GEOSCI 209 taught by Professor Joelblum during the Fall '11 term at University of Michigan.

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29th Sept - Global climates & biomes - what factors control...

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