Humans are the Primary Cause of Global Warming

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Humans are the Primary Cause of Global Warming

• The science indicates humans are the primary
  cause of global warming at the gt95 probability
  (In science that is a virtual certainty)

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Why We Know That Humans are the Cause

• The following graphs will show why we know that
  humans are the primary cause of global warming.
• There is a direct correlation between the
  measured human emissions of greenhouse gases, the
  rise in atmospheric greenhouse gases, and the
  rise in temperature. The rates of increase in
  each is unprecedented.
• There is a direct correlation between the growth
  in the human population and the rise in
  greenhouse gases and temperature.
• Computer simulations indicate that only
  human-caused emissions of greenhouse gases can
  cause the observed rise in temperature of the
  atmosphere and other Earth systems (Oceans,
  Continents and Ice).
• No other natural causes can account for the
  present rapid rise in temperature and CO2. The
  present rate CO2 increase is about 20,000 faster
  than natural rates.

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Climate Drivers
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Temperature, CO2 Concentrations and Carbon
Emissions
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The rate of emissions and amount of increase in
CO2 is Unprecedented
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Only Human-caused Greenhouse Gas Emissions Can
Account for Global Warming

• The black line is the observed temperature rise.
• The red area is computer simulations of all
  emissions, including human.
• The blue area is computer simulations of only
  natural emissions and the increase in solar
  activity.

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The Warming Oceans
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Aerosols
Aerosols
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Atmospheric CO2 and Population Growth
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Atmospheric CO2 and Population Growth
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Why the increase in Solar Irradiance is NOT the
Cause of the present Warming

• The next slides shows that there is NO
  correlation between Solar Irradiance and the
  current rise in temperature.
• Instead, they show that humans are the primary
  cause of global warming.
• If the world does not drastically reduce the
  emissions of greenhouse gases then we are headed
  for a catastrophe.

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Solar Irradiance, Temperature, and Atmospheric CO2
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Solar Irradiance, Temperature, and Human-Caused
CO2 Emissions