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Climate Change

Learn about the impact of cryosphere changes on global climate. Explore data on glaciers, sea ice, and permafrost, and their role in altering Earth's radiation balance. Discover how these changes influence temperature rise, freshening in sub-polar regions, and potential sea level rise.

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Climate Change

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  1. Climate Change

  2. To change Earth’s radiation balance, we must change… • incoming solar radiation • albedo • greenhouse gas concentrations

  3. Cryosphere snow covered regions glaciers ice caps sea ice permafrost

  4. Cryosphere and Time Scales

  5. Changes in River & Lake Ice • long record • minor volume, but impacts flooding • later freeze up, earlier thaw • insufficient data on thickness

  6. Arctic Sea Ice • 7-15 x 106 km2 • ~ 2.7%/decade decline since 1978 • < 1m decline in thickness, central Arctic 1987-97

  7. Antarctic Sea Ice = 3-19 x 106 km2

  8. Global CO2 Emissions : 1752-2006

  9. The Carbon Cycle

  10. Glacial Melting

  11. Glaciers and Ice Caps

  12. Summary • 1961-2003, global temperature has risen by 0.10o C • 1955-1998, global freshening in sub-polar • circulation changes? • Inorganic carbon increase • Sea level rise 1961-2003

  13. Ocean heat content 0-700m

  14. Chlorofluorocarbon (CFC) • is an organic compound that contains carbon, chlorine, and fluorine.

  15. Greenhouse Gasses 1850-2000

  16. Vostok Ice Core Data

  17. Ice Core Data

  18. Potential Sea Level Rise in North America

  19. Thermohaline Circulation

  20. Solar Flares Effect Earth’s Climate • http://en.wikipedia.org/wiki/Solar_cycle

  21. Climate Change Websites • http://www.epa.gov/climatechange/emissions/co2_human.html

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