Chapter03b - Daily Temper atur e Var iations RECAP •...

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Unformatted text preview: Daily Temper atur e Var iations RECAP • Seasonal variations on the Earth result from ♦ Different amount of solar energy received at a given location at a given time of the year ♦ Different length of the day (the time during which a given latitude receives energy from the sun) ♦ The different response of the Earth surface to the incoming solar energy (oceans and continents) • The Earth orbits the Sun on an almost circular orbit. • The Earth axis of rotation is tilted with respect to the ecliptic at 23.5 degrees. • The inclination of the of the Earth axis is the reason for the presence of seasons. ♦ The angle at which the sun rays hit the surface of the Earth at a given latitude changes. ♦ The length of the day changes Par allels and Mer idians • Longitude : describes the location of a place on Earth east or west of a north- south line called the Prime Meridian ♦ Meridians: lines of equal longitude ♦ Greenwich meridian : adopted at the I nternational Meridian Conference, Washington DC, 1886. (Dom. Republic against, France and Brazil abstained). ♦ Other prime meridians: Ferro, Paris… • Latitude : gives the location of a place on Earth north or south of the equator ♦ Parallels: lines of equal latitude ♦ Tropic of cancer : 23° 26 22 north of ′ ″ the Equator ♦ Tropic of Capricorn : 23° 26 22 south ′ ″ of the Equator ♦ Arctic circle : 66° 33 39 north of the ′ ″ Equator ♦ Antarctic circle : 66° 33 39 south of ′ ″ the Equator The Sun’s position in the sky....
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Chapter03b - Daily Temper atur e Var iations RECAP •...

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