GEOG 001 Lecture Notes - Lecture 3: Great Circle, Subsolar Point, Equinox
7 Aug 2020
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Need to identify exact location of phenomena. Need to standardize the reporting of specific locations. Uses a system of coordinates (x, y) 33 12" 35 n, 87 34" 9 w. Must have reference points: no natural lines of reference in space. Horizontal directions: based on rotation of earth, north or south of the equator. Azimuth: degrees from magnetic north, (0 360 ) Mariner"s compass: uses cardinal direction (n, e, s, w) Seasons are caused by axial tilt (23. 5 ) They are not caused by distance from the sun. Angle of the sun and day length change the amount of solar energy we receive. The altitude of the sun changes its heating ability. Strongest when the sun is directly overhead (90 : focused on a small spatial area. Heating ability gets weaker when the sun is not directly overhead: spread over a larger area. Latitude receiving direct rays from the sun (90 degrees)
