energetic oxygen molecules 99.9% of gas lies below this layer little mixing of air, has beneficial...
TRANSCRIPT
ATMOSPHERE STRUCTURE & COMPOSTION
Energetic oxygen molecules
99.9% of gas lies below this layer
Little mixing of air, has beneficial ozone
N2 (79%), O2(20%) horizontal and vertical
mixing of air
Solar radiation is absorbed by O2
Fewer gases absorb little energy
O3 absorbs solar energy(UV-B & C) and
pushes it downward creates isotherm
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.
CH4CH4 H2OH2O
N2ON2OCFCCFC
CO2 CO2
Atmosphere: Energy budgetAlbedo varies with season and geography
Surface cover that has a high albedo
Snow & iceCloud coverAerosols