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Global Climate Change http://video.pbs.org/video/2365212163/

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Presentation on theme: "Global Climate Change http://video.pbs.org/video/2365212163/"— Presentation transcript:

1 Global Climate Change

2 Overview Introduction to Climate Change
Causes of Global Climate Change Debate over Global Climate Change Effects of Climate Change Melting Ice and Rising Sea Level Changes in Precipitation Patterns Effects on Organisms Effects on Human Health Effects on Agriculture Addressing with Global Climate Change

3 Terminology Greenhouse Gas Positive and Negative Feedback - Homeostasis Infrared Radiation Greenhouse Effect Greenhouse Gas Gas that absorbs infrared radiation Positive Feedback Change in some condition triggers a response that intensifies the changed condition Infrared Radiation Radiation that has a wavelength that is longer than that of visible light, but shorter than that of radio waves Greenhouse Effect Increase of heat in a system where energy enters (often as light), is absorbed as heat, and released sometime later

4 Evidence for Climate Change - Temperatures

5 Evidence for Climate Change - Phenologic

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9 Effect on Organisms – Hardiness Zones
© 2012 John Wiley & Sons, Inc. All rights reserved.

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11 Wildfire in California

12 Hypothesis and Model Development

13 Greenhouse Gases

14 Factors Associated with Climate Change
Increased concentration of CO2 (right) Burning fossil fuels in cars, industry and homes Deforestation Burning of forests Increases in other greenhouse gasses

15 Radiative Forcing Radiative Forcing (RF) is the measurement of the capacity of a gas or other forcing agents to affect that energy balance, thereby contributing to climate change. Put more simply, RF expresses the change in energy in the atmosphere due to GHG emissions.

16 Pollutants That Cool the Atmosphere
Atmospheric Aerosols Both human and natural sources Tiny particles (or sulfur) that remain in troposphere for weeks or months Sulfur-laden layer in the atmosphere reduces the amount of sunlight reaching earth Complicates models of climate change © 2012 John Wiley & Sons, Inc. All rights reserved.

17 Actions Adaptation v. Mitigation Sea Level Rise

18 Changing Patterns of Precipitation

19 Ecological Effects

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21 krill

22 Mitigation Reducing Emissions Sequestration Geoengineering

23 Ocean Acidification

24 International Agreements


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