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FACTORS THAT AFFECT TEMPERATURE
1) Latitude - average temperature decreases north and south from equator

    Due to:  a) sun's rays spread over greater area
                 b) sun's rays pass obliquely through thicker layer of atmosphere

2) Time of Year or Seasonal Variation - temperature fluctuates most in the Temperate Zone

    Seasons: caused by the unique tilt of earth and orientation to sun
    summer solstice - June 21 or 22, when earth's axis is tilted 23 1/2o towards sun.
        Warmer due to:
        a) sun's rays concentrated over smaller area
        b) sun's rays travel through thinner layer of atmosphere
        c) days longer

    winter solstice - Dec. 21 or 22, when earth's axis is tilted 23 1/2o away from sun
        Colder due to:
        a) sun's rays spread over larger area
        b) sun's rays pass obliquely through thicker layer of atmosphere
        c) shorter days

    vernal or spring equinox - March 20 or 21, when earth's axis is oriented oblique to,
        but neither towards nor away from, the sun

    autumnal or fall equinox - Sept. 22 or 23, when earth's axis is oriented oblique to,
        but neither towards nor away from, the sun

3) Time of Day

    a) minimum average temperature: just before sunrise

    b) maximum average temperature: mid-afternoon

4) Elevation or Altitude

    a) small scale - hot air rises, cold air sinks into low areas

    b) large scale -  the temperature decreases 0.6 oC/100 m or 1 oF/330 ft increase in altitude

5) Slopes - warmest to coldest slopes of a hill or side of a building: south > west > east > north

6) Water Bodies - stabilizes temperature; warmer in winter, cooler in summer

7) Soils

    a) dark soils warm faster than light soils in spring

    b) dry soils warm faster than moist soils in spring