GEO 211 1st Edition Lecture 9Outline of Last Lecture I. Solar Particles and AuroraII. Chapter 3- Earth and Sun RelationshipsA. Why do we have seasons?B. Physical factors causing seasonal variations1. Earth’s revolution2. Earth’s rotation3. Earth’s angle of inclination4. Earth’s axis orientation5. Earth’s sphericityC. Earth’s revolutiona. Perihelonb. TaphelionD. Earth’s rotationE. Earth’s angle of inclinationF. Earth’s axis orientationG. Earth’s sphericitya. PolarisH. Solstice ConditionsOutline of Current Lecture III. Chapter 3- continuedA. December 21/22- Noon strikes perpendicular at 23 1/2°So Tropic of Capricorno Winter solstice- 1st day of winter in Northern Hemisphere, but 1st day of summer in the Southern Hemisphere- Every location in Southern Hemisphere is experiencing its longest length of daylight and highest sun angleo Opposite is true for the Northern HemisphereThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Length of daylight gets longer going south until Antarctic Circle (66 1/2°S) is reached, where daylight is 24 hours- no darknesso Opposite is true for the Northern HemisphereD. Equinox conditions: equal length of day/nighta. March 20/21- noon sun strikes perpendicular at equatoro 1st official day of spring= vernal (spring) equinox b. September 22/23- noon sun strikes perpendicular at the equatoro 1st official day of fall= autumnal (fall) equinox IV. Air Temperature DataA. How it is recorded:- Daily mean- Daily (diurnal) range- Monthly mean- Annual mean- Annual rangeA. Daily meanB. Daily rangeC. Monthly meanD. Annual meanE. Annual rangeCurrent Lecture III. Chapter 3- continued- Every location in North Hemisphere is experiencing its longest length of sunlight and highest sun angleo Opposite is true for Southern Hemisphere- Length of daylight gets longer going North until arctic circle (66 1/2°N) is reached,where daylight is 24 hours- no darknesso Opposite is true for Southern HemisphereA. December 21/22- Noon strikes perpendicular at 23 1/2°So Tropic of Capricorno Winter solstice- 1st day of winter in Northern Hemisphere, but 1st day of summer in the Southern Hemisphere- Every location in Southern Hemisphere is experiencing its longest length of daylight and highest sun angleo Opposite is true for the Northern Hemisphere- Length of daylight gets longer going south until Antarctic Circle (66 1/2°S) is reached, where daylight is 24 hours- no darknesso Opposite is true for the Northern HemisphereD. Equinox conditions: equal length of day/nighta. March 20/21- noon sun strikes perpendicular at equatoro 1st official day of spring= vernal (spring) equinox b. September 22/23- noon sun strikes perpendicular at the equatoro 1st official day of fall= autumnal (fall) equinox- Every location on Earth has 12 hours of daylight and 12 hours of darkness- Both hemispheres receive equal amounts of solar energy IV. Air Temperature DataA. How it is recorded:- Daily mean- Daily (diurnal) range- Monthly mean- Annual mean- Annual rangeA. Daily mean- Average of 24 hourly readings or average of daily maximum and daily minimumB. Daily range- Daily max- daily minC. Monthly mean- Average of daily means of that monthD. Annual mean- Average of 12 monthly meansE. Annual range- Warmest monthly mean= coldest monthly meano Ex: July mean-January mean- Isotherms: shows distribution of temperature, line on a map connecting points of equal
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