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# Lab03-04Answers - Solutions to Homework Exercises for...

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Solutions to Homework: Exercises for Weather and Climate , Lab 3, Questions #5–9 Lab 4, Questions #11–14 EES 108: Earth and Atmosphere Due Thurs. Sept. 15 Lab 3, #5–9 For questions 5–9, consult Figures 3-2 and 3-3, which show shortwave and longwave radiation at Maun, Botswana, which is located at 20 South latitude. Lab 3, #5 Why is incoming shortwave radiation higher in early February than it is in early August at this location? Maun, Botswana, is located at 20 South latitude. In early February, the sun is almost exactly overhead (if you use the Earth-Sun geometry program on the CD-ROM that accompanies the book, you’ll see that on Feb. 1, the solar declination is - 17 . 7 , meaning that the zenith angle at Maun would be 2.3 , so the sun would be almost exactly overhead) so the incoming sunlight is more intense than at any other time of year. In early August, the location with the brightest sunlight is north of the equator (on Aug. 1, the solar declination is + 18 . 1 , so the zenith angle at Maun would be 38.1 ), so the sunlight at Maun will be less intense. Lab 3, #6 The solar noon solar radiation values at the top of the atmosphere above Maun are 1366 Wm - 2 on February 2 and 1074 Wm - 2 on Aug. 2. Why is solar receipt at the surface lower? Shortwave radiation is depleted by scattering and absorption as it passes through the at- mosphere. Note that the diﬀerence between the top-of-atmosphere value (1366 Wm - 2 and 1074 Wm - 2 on Feb. 2 and Aug. 2, respectively) and the surface value (roughly 1100

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Lab03-04Answers - Solutions to Homework Exercises for...

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