geology test 3

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Last updated 11:17 PM on 4/20/26
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11 Terms

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greenhouse effect

Retention of heat in the troposphere caused by trapping of infrared radiation by greenhouse gases. These gases sorb and redirect some of the IR back to Earth (warming troposphere, hydrosphere and surface)

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predominant greenhouse gases on Earth

CO2, CH4

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anthropogenic sources of CO2

burning fossil fuels

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anthropogenic sources of CH4

landfills, rice paddies, cattle

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present concentration of CO2

400 ppm

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Preindustrial CO2

200-280 ppm

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Anthropogenic

Humankind

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Function of stratospheric ozone

Filters most harmful UV radiation (UVc) from reaching Earth

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methane is a more potent GHG

Sorbes the fraction of Infrared radiation that is more energetic (a fine point.)

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global circulation models (GCM)

describe the circulation of heat in time-forward models