Atmosphere Structure & Compostion

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Presentation transcript:

Atmosphere Structure & Compostion

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

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

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.

CO2 N2O CH4 CFC H2O

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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