Title: Aerographer's Mate 3 & 2
Identifier: aerographersmate00nava (find matches)
Year: 1976 (1970s)
Authors: Naval Education and Training Program Development Center; United States. Bureau of Naval Personnel
Subjects: United States. Navy; Meteorology; Oceanography
Publisher: Washington : U. S. Dept. of Defense, Navy Dept. , Naval Education and Training Support Command
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Chapter 12 —THE GOVERNING FUNDAMENTALS OF METEOROLOGY
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Figure 12-3, —Revolution of the earth around the sun. 209.3 Hemisphere is inclined 23 1/2° TOWARD the sun. This inclination results in more of the sun's rays reaching the Northern Hemisphere than the Southern Hemisphere. On or about June 21, the sun shines OVER the North Pole down the other side to latitude 66 l/2°N (the ARCTIC CIRCLE), and the most perpendicular rays of the sun are received at 23 l/2°N lat (the TROPIC OF CANCER). The Southern Hemisphere is tilted AWAY from the sun at this time, and the sun's rays reach only to 66 1/2°S lat (the ANTARCTIC CIRCLE) and do not go beyond this latitude. The area between the Antarctic Circle and the South Pole is in darkness; the area between the Arctic Circle and the North Pole is receiving the sun's rays for 24 hours each day. Note carefully the shaded and unshaded area of the earth in figure 12-3 for all four positions. At the equinoxes in March and September, the tilt of the earth's axis is neither toward nor away from the sun. For this reason, the earth receives equal numbers of the sun's rays in both the Northern Hemisphere and the Southern Hemisphere, and the sun's rays shine most perpendicularly at the Equator. In December, the situation is exactly reversed from that in June, The Southern Hemisphere now receives more of the sun's rays. The most perpendicular rays of the sun are received at 23 1/2°S lat (the TROPIC OF CAPRICORN). The 253

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