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Global Climate Change: Detection and Attribution
Finish Idealized Global Circulation Model and Global ClimatesIs the Current Climate Changing? If so, on what evidence?Why?
Exam I on Feb 4! Review Sheet is Posted.
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Where the Hell is Matt?http://www.youtube.com/watch?v=zlfKdbWwruY
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June–July ITCZ
Figure 6.11
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Seasonal Patterns
Location of the sun’s noon-time vertical rays (i.e., where the sun is directly overhead) helps to control the position of the ITCZ
Northern Hemisphere summer, ITCZ and all of the wind and pressure belts migrate to the north
North Hemisphere winter, ITCZ and all of the wind and pressure belts migrate to the south
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Modified Köppen System
Figure 8-4
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© 2012 Pearson Education, Inc.
7
Global Climate Regions
Figure 2.13
Climograph
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Climographs
Figure 8-6
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Climate Change Detection
Is the Earth’s Current Climate Changing?
If so, what evidence can you provide?
(We will discuss the question of attribution in a bit.)
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Figure 10.30
YES!
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YES!
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Figure SPM.1bObserved change in surface temperature 1901-2012
All Figures © IPCC 2013
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Figure SPM.2Observed change in annual precipitation over land
All Figures © IPCC 2013
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Figure SPM.3Multiple observed indicators of a changing global climate
All Figures © IPCC 2013
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Observed Variations in the Cryosphere
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Linear Trend of Annual Temperatures
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Observed Variations in the Cryosphere
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Chasing Ice
• http://www.chasingice.com/
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Climate Change AttributionWhy is the climate changing?
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What are some Anthropogenic Influences on Climate?
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What are some Anthropogenic Influences on Climate?
Greenhouse gases
Aerosols – suspended particulates
Land use/land cover change
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A rectangular piece of coal in a wagon is on display in the middle of Pacific Avenue In Tacoma before the arrival of President Harrison in May, 1891.
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Life Magazine (1962)
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Natural Forcings?
Solar Irradiance
Volcanoes
Changes in Oceanic and Atmospheric Circulation
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No denying that the anthropogenic
warming is playing a role:
Question is how much?