GilbertKLab3

# GilbertKLab3 - University of Denver Dr. Keables Name:_ Lab...

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University of Denver NATS 1201 Dr. Keables Environmental Systems Name:__________________________ Lab Exercise 3 Orbital Geometry and Variations in Solar Radiation Receipt Create a Word document for your answers and save it under the filename A. Visualization of Variations in Solar Radiation. The first part of this lab exercise will allow you to use a graphic model that simulates solar radiation receipt at different latitudes for different dates of the year. Go to the following website to access the module: http://people.cas.sc.edu/carbone/modules/mods4car/earthsun/earthsun.html 1. Run the model and provide a description of how the solar angle changes throughout the year for the following latitudes: Equator – On December 21, the winter solstice, the equator experiences a solar angle of 66.5 degrees. This angle then increases all the way through march 23 rd , the spring equinox, reaching a max of 89.9 degrees. The angle then decreases back to 66.5 through June 22 nd , the summer solstice, increases back to 89.9 degrees through September 21, the fall equinox, before decreasing back down to 66.5 for the winter solstice. Tropic of Cancer - 23.5 degrees N Experiences an angle of 43 degrees on the winter solstice, which then increases to 66.5 degrees for the spring equinox. The angle then continues to increase all the way to 90 degrees on the summer solstice, before going back down to 66.5 on the fall equinox and 43 degrees on the winter solstice. Denver (40N) – Experiences minimum angle of 26.5 degrees on the winter solstice before increasing to 50.1 degrees on the spring equinox. The angle then continues to increase to 73.5 for the summer solstice, before decreasing back to 50.1 on the fall equinox and down to 26.5 again on the winter solstice. Arctic Circle – 66.5 degrees N The Arctic Circle experiences polar night during the winter solstice on December 21 st , with a nonexistent solar angle. It then reaches 0 on the 23 rd , and slowly increases to 23.5 degrees on the spring equinox. It then continues to increase to 47 degrees on the summer solstice, before decreasing back to 23.5 on the fall equinox and all the way back to polar night on the winter solstice.

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North Pole – 90 degrees N The north pole experiences polar night from the fall equinox through the winter solstice and all the way through the spring equinox. The solar angle then increases to 23.5 degrees on the summer solstice, before going back to polar night on the fall equinox again. 2. Using the model, describe how the intensity of the solar radiation changes throughout the year for the following latitudes: Equator – At the winter solstice, the equator experiences 1.090 units of solar radiation. This then decreases down to 1 unit of radiation on the spring equinox, before increasing
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## This note was uploaded on 02/20/2010 for the course NATS 1201 taught by Professor Keables during the Spring '08 term at Denver.

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GilbertKLab3 - University of Denver Dr. Keables Name:_ Lab...

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