The atmosphere is changing Observed impacts of climate change What can we project for the future.
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Transcript of The atmosphere is changing Observed impacts of climate change What can we project for the future.
Contents
The atmosphere is changing
Observed impacts of climate change
What can we project for the future
Chemical Composition of the Atmosphere
Nitrogen78.057%
Oxygen20.944%
Argon0.930%
Carbon Dioxide0.039%
Other gases0.031%
Radiative Forcing
CO2 H2O CH4
Clouds Land Use Change Aerosols
CO2 H2O CH4
Clouds Land Use Change Aerosols
Intergovernmental Panel on Climate Change
There is a 95% certainty that human activities are responsible for global warming
CO2 is at an “unprecedented” level not seen in the past 800,000 years
Sea level is set to continue to rise at a faster rate than over the past 40 years
Over the last 20 years, the Greenland and Antarctic ice sheets have been melting and glaciers have receded in most parts of the world
Key findings from the Fifth Assessment Report (AR5)
Observed Impacts
Sea Level Severe Storms Ocean Acidification
Glaciers and Snow cover Precipitation Cycles Heat Waves
Observed impacts: Temperature
These graphs show the average annual and decadal surface temperatures
IPCC 2013
Observed Impacts – Sea Ice
Scientific Visualization Studio, NASA Goddard Space Flight Center
average minimum extent
(1979-2010)
Conclusions
Global Regional Local
Academic Energy Building
Transportation
Food Production
Adaptation
References
• IPCC, 2013: Summary for Policymakers. In: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S. K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. Available from http://www.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_SPM_FINAL.pdf (accessed February 14, 2014)
• Ramaswamy, V., O. Boucher, J. Haigh, D. Hauglustaine, J. Haywood, G. Myhre, T. Nakajima, G. Y. Shi, and S. Solomon. 2001. Radiative forcing of climate change, Climate Change 2001: The Scientific Basis, Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change JT Houghton, et al.: 349–416.