test 2 notes GEOG 2050

test 2 notes GEOG 2050 - Geography 2050- Test 2 Notes...

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Geography 2050- Test 2 Notes Kaitlynn Fish- Spring 2009 Global Temperatures Key Controls I. Latitude a. insolation is key II. Altitude a. lapse rate b. insolation more intense at high altitude c. thinker (less dense air) absorbs/radiates less energy d. colder temps. larger temp range III. Cloud Cover a. avg. 50% of earth b. moderate temps- lower highs, higher lows (smaller range) c. highly variable, difficult to predict/model IV. Land/Water Heating a. insolation is key control but can be strongly moderated by large water bodies b. evaporation: more over water=greater cooling c. transparency: sunlight penetrates/warms a thick later of water d. mixing: energy absorbed by water is mixed through the water column e. specific heat capacity: 4 times more energy to warm the same amount f. movement: ocean currents (moderate temperature locally) g. Water moderates temperatures: maritime effect h. Continental interiors have larger annual temperature range: continentality effect March 3, 2009 Global Temperature Patterns I. Map of Temperatures: average for January a. contour interval is 3 degrees Celsius between lines b. Thermal Equator i. falls to the south of the actual equator generally because of the declination of the Sun causing longer days c. very clear latitudinal patter because of insolation in area d. band of moderate temperatures is broken by North America because of continentality effects e. isotherms are going down to the south as they move over a landmass f. high heat capacity of water helps it retain heat more than landmass g. Verhoyansk: -68 degrees C i. 7 months of the year temperatures are below freezing ii. 4 months of the year temperatures less than -30 degees C II. Temperatures for July a. continental maritime influence but not as great as winter b. temperature range -15 degrees C not as extreme as winter III. Global Temperature Range a. the average high temperature with the average low temperature globally
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Geography 2050- Test 2 Notes Kaitlynn Fish- Spring 2009 b. farther north and south of equator you see a greater range c. temperatures are greatly affected by the presence of landmasses d. high variability over landmasses; tropics= small variability; poles=large variability IV. Air Temperatures and Human Body a. get from Michelle Chapter 6- Wind: a horizontal movement of air I. What Causes wind? a. air temperature differences and *pressure differences* b. flows from areas of higher pressure to areas of lower pressure c. we have areas of different pressure because of differences in temperature II. Differential Heating a. the sun causes the temp changes which cause pressure changes which cause wind b. ultimate energy source that drives wind=solar energy III. Pressure- force per unit area exerted perpendicular to a surface
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test 2 notes GEOG 2050 - Geography 2050- Test 2 Notes...

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