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Lecture 26 - Climate

Lecture 26 - Climate - Chapter 20 Climate Lecture 26...

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Chapter 20 Climate Lecture 26 Climate and Climate Change
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Exam 3 Average = 78 Standard Deviation = 11
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Grading Curve for EAS 2600 Fall 2011 Course Average (see T-square) Grade 87-100 A 77-86 B 67-76 C 57-66 D 56 and below F Lecture 75% Lab 25% If you have taken the three exams during the semester and decide to take the final, then the lowest score of these four exams will be dropped. I will use the same grade ranges listed above to calculate course grades after the final. .
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Final Tuesday December 13 11:30-2:20pm Comprehensive Multiple Choice Short Answer
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Atmospheric heating Mechanisms of heat transfer Radiation (electromagnetic radiation) Consists of different wavelengths Gamma (very short waves) X-rays Ultraviolet (UV) Visible Infrared Microwaves and radio waves
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The electromagnetic spectrum
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Atmospheric heating Mechanisms of heat transfer Radiation (electromagnetic radiation) Governed by basic laws All objects, at whatever temperature, emit radiation Hotter objects radiate more total energy per unit area than do cooler objects The hotter the radiating body, the shorter the wavelength of maximum radiation Objects that are good absorbers of radiation are good emitters as well
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Atmospheric heating Incoming solar radiation Atmosphere is largely transparent to incoming solar radiation Atmospheric effects Reflection albedo (percent reflected) Scattering Absorption Most visible radiation reaches the surface About 50% absorbed at Earth's surface
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Average distribution of incoming solar radiation
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Atmospheric heating Radiation from Earth's surface Earth re-radiates radiation (terrestrial radiation) at the longer wavelengths Longer wavelength terrestrial radiation is absorbed by Carbon dioxide and Water vapor in the atmosphere Lower atmosphere is heated from Earth's surface Heating of the atmosphere is termed the greenhouse effect
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The heating of the atmosphere
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Temperature measurement Daily maximum and minimum Other measurements Daily mean temperature Daily range Monthly mean Annual mean Annual temperature range
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