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GRAPHING CLIMATE CHANGE

GRAPHING CLIMATE CHANGE. Scientists predict an approximate increase of the average global temperature of 3.6-5.4 F by the end of this century. QUESTIONS. What does this mean in regards to the daily temperature in the Arctic? Will every day have a higher than average temperature?

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GRAPHING CLIMATE CHANGE

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  1. GRAPHING CLIMATE CHANGE

  2. Scientists predict an approximate increase of the average global temperature of 3.6-5.4 F by the end of this century

  3. QUESTIONS • What does this mean in regards to the daily temperature in the Arctic? • Will every day have a higher than average temperature? • Will every month have a higher than average temperature? • How will an increase in overall temperature affect local ecosystems? • Will temperature chagnes be consistent across an area, such as all of Alaska? Will some areas see an increase in temps while others see a decrease in temps? Why or why not?

  4. https://climate.nasa.gov/climate_resource_center/interactiveshttps://climate.nasa.gov/climate_resource_center/interactives • https://climate.nasa.gov/interactives/climate-time-machine • http://www.arcticclimatemodeling.org/multimedia.html

  5. Even a slight increase in atmospheric temperature can increase evaporation of water to the atmosphere • Water vapor is a greenhouse gas, so an increase in water vapor causes an increase in temp • However, more water vapor also increases cloud cover, which contributes to an increase or decrease in atmospheric temperature • Low clouds cool by blocking insolation • High clouds warm by trapping outgoing radiation

  6. In the Arctic, temp increases may be more dramatic than equatorial regions because: • balance of Arctic temps, which fluctuate around freezing • Snow and ice cover reflect sunlight

  7. As snow and ice cover decreases, the overall albedo (reflectivity) decreases, resulting in more absorption of solar energy • As sea ice melts, open ocean results in more heat absorption in Arctic waters, slowly warming the oceans • Heat in the ocean is slowly released, resulting in warmer coastal regions, creating a positive feedback loop that continues to melt the snow and ice

  8. A positive feedback loop is a reinforcing pattern: (Less sea ice reduces albedo, which results in further warming)

  9. Interactive Group Work • Uploaded onto TEAMS • Each assigned unit needs only 1 laptop • Upload completed document back into TEAMS

  10. Graphing Lab • Remember that a temperature normal is the average temperature over a period of 30 years or more. • Scientists use normal to determine what is typical weather and climate, and what is variation

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