Climate change

For 4 billion years.
1. Life has prospered
  1. Ice Age
    1. Change
      1. Species beneficied, adapted, faltered or died.
  2. Steamy Heat
    1. Change
Global Climate
1. Complex combination of factors.
  1. We don´t yet fully understand.
2. Supercomputer simulation.Projet future conditon
3. Cloud and oceans affect.
4. Greenhouse Effect
  1. Without "Atmosphere"
    1. Global temperature minus 18ºC
  2. Incoming Sunlight strike earths surface.
    1. Part back into space
    2. Rest Trapped in the lower air layer.
      1. Increased heating
        + water evaporate
        Feedback
      2. Number of gases
  3. Human
    1. Produce others
      1. Intesify it.
    2. Increase Co2 concentration
      1. 2060 twice preindustrial level
      2. 2100 four times as high.
      3. CO2: Lifetime 100 tears in atmospher
    3. Methane
      1. Principal Ingrdient of natural gas
      2. Caused 15% warming
      3. Lifetime in atmosphere, 1 decade
      4. Other
        Nitrous oxide
        Agriculture and industry
        Banned
        Darming ozono layer
    4. Release tons of carbon
      1. Into atmosphere per year
        750 billion already
        3 million remain tons in the air
        Rest taken by plants, ocean.
        Remove 2 Billion tons from atmosphere each year
        High co2 fertilizing effect
        Commercial artificial indoor atmosphere. With co2
        Airborne suspended particles
        Aerosol
        May help explain the odd mind- century cooling
    5. Models and uncertainly
      1. Gcms
        Equations repreenting known laws of atmospheric
        Enough information 100 years ago
        Could provide exact description of today
        Need powerfull computer
        Divide earthsurface into grid
        Used property useful tools
        Cant solve problem
As the world warms
1. Warming
  1. More water vapor in air
    1. More rainfall, more intense weather generally
      1. Heat waves more serious
        1997 was the hottest
        People have contributed to global warning
2. 1860
  1. 1860 Planet was still recovering from little ice age
    1. Presat warning might be a continues of that rebound
      1. Critical issues
        Temperature shifts
        Climate changes keeps rapid
        Greenhouse warning will be large ever on geological scale
Anticipating the future
1. If greenhouse gas emition stop
  1. Warm continues for decades
    1. “Next 10 years will tell”
      1. “We’re going to have to wait”

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Climate change

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	Created by Martina Safronch about 9 years ago