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Global Climate Change

Global Climate Change. Climate and Agents Models and Measurement Biosphere and Human Component. www.meteor.iastate.edu/gccourse /. Evolution of the Earth’s Atmosphere. How Did It Get This Way??. escape velocity --a balance of gravitational energy at the planet surface and kinetic energy

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Global Climate Change

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  1. Global Climate Change • Climate and Agents • Models and Measurement • Biosphere and Human Component

  2. www.meteor.iastate.edu/gccourse/

  3. Evolution of the Earth’s Atmosphere How Did It Get This Way??

  4. escape velocity --a balance of gravitational energy at the planet surface and kinetic energy :mgRp = 1/2 mVe2--> Ve = (2gRp)1/2

  5. The effective temperature of the body gives an approximation of the temperature of the gaseous constituents at the "outer edge" of its atmosphere. This temperature determines the most probable velocity of each constituent in this region, as given by the following equation: VM = (2kT/MmH)1/2 whereVM = most probable velocity for molecule of weight M k = Boltzmann's constant (1.38 x 10-23 J deg-1) T = effective temperature M = molecular weight of a particular gas species mH = mass of the hydrogen atom ( 1.67 x 10-27kg)

  6. Composition of the Earth's atmosphere below 100 km Constituent Mol Wt Content Oxygen(O2) 32.00 0.2095 Nitrogen(N2) 28.01 0.7808 Argon(A) 39.94 0.0093 Water (H2O) 18.02 0-0.04 CO2 44.01 364 parts per million Neon(Ne) 20.18 18 parts per million Helium(He) 4.00 5 parts per million Krypton(Kr) 83.7 1 part per million Hydrogen(H) 2.02 0.5 parts per million Ozone(03) 48.00 0-12 parts per million

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