Geology 101 HW11 pt. 2

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Author:
pjay318
ID:
155070
Filename:
Geology 101 HW11 pt. 2
Updated:
2012-05-21 14:57:57
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climate change
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I FUCKING HATE GEOLOGY
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  1. Climatic influences
    • Solar output
    • Earth's till
    • Shape of Earth's orbit
    • Composition:Atmosphere & Surface
    • Circulation of the ocean
  2. Albedo
    • the diffuse reflectivity or reflecting power of a surface.
    • Ice, clouds, dust-incease the allbedo(make the earth shinier.
    • Water, dark rock
  3. Greenhouse Gasses
    • Carbon dioxide [CO2]
    • Methane [CH4]
    • Water [H2O]
    • CHLOROFLUOROCARBON [CFCs]
    • Absorb infra-red
  4. Biodiversity
    the degree of variation of life forms within a given species, ecosystem, biome, or an entire planet.
  5. Biogeochemical Cycle
    a pathway by which a chemical element or molecule moves through both biotic (biosphere) and abiotic (lithosphere,atmosphere, and hydrosphere) compartments of Earth.
  6. Cooling off since 55 Myr
    • 40 Ma Antarctica isolated
    • 27 Ma claciers Antarctica
    • 10 Ma, ice cheets on Ant. And N. America
    • By 1.6 Ma - Begining of Ice Age
  7. Why Cooling Trend?
    • Motion of continents toward Poles
    • Increase in albedo
    • Fall in Sea Level
    • Uplift of Tibetan and Colorado Plateaux
  8. Milankovitch Cycle
    • 1. Eccentricty of Earth's orbit = shape change ~ 100,000yr cycles
    • 2. Tilt of Earth changes 22-24 degrees ~ 41,000yr cycle
    • 3. Earth's axis wobbles ~ 23,000yr cycle
    • Changes distance from sun suring northern summers, important because N. Hemi has more land.

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