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Atmosphere Structure & Compostion

Discover the intricate structure and energetic composition of Earth's atmosphere, from how oxygen molecules absorb solar radiation to the role of greenhouse gases in energy absorption. Learn about the energy budget, albedo variations, and atmospheric layers.

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Atmosphere Structure & Compostion

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  1. Atmosphere Structure & Compostion

  2. Energetic oxygen molecules Solar radiation is absorbed by O2 99.9% of gas lies below this layer Fewer gases absorb little energy Little mixing of air, has beneficial ozone O3 absorbs solar energy(UV-B & C) and pushes it downward creates isotherm N2(79%), O2(20%) horizontal and vertical mixing of air Convection creates cool air as it rises

  3. Energy Budget. • 100% insolation • 30% is reflected back to space: clouds, atmosphere, earth’s surface • 70% is absorbed mostly in the shorter wavelength solar radiation • 51% by earth’s surface • 19% by atmosphere & clouds

  4. Light energy comes through the atmosphere….(U.V. Radiation) ..the energy is absorbed by the Earth… …and radiated back as infrared energy… …where greenhouse gasses retain the heat.

  5. CO2 N2O CH4 CFC H2O

  6. Atmosphere: Energy budget Albedo varies with season and geography Surface cover that has a high albedo Snow & ice Cloud cover Aerosols

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