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Power point 1*

  1. 1. World Climates John Baccihttp://earthsky.org/ Tues/Thur 11:00
  2. 2. Terms to Start• Climate: The general weather conditions in an area over a long period of time. Focusing on Air temperature and average precipitation.• Weather: Is the state of the atmosphere at agiven time and place. The variables wouldpertain to immediate temperature, windvelocity, and moisture…..
  3. 3. • How are Climate and Weather Alike?They both deal with measuring conditions in the atmosphereEx: rainfall, wind, temperature….• How are Climate and Weather Different?Weather deals with the immediate conditions of the atmosphere at a specificpoint. Where Climate deals with the overall averages of conditions in an area. http://www.kbears.com/climates/p rintmild.html
  4. 4. Example of Climate vs. WeatherThe average temperature In The Temperature is 70 the rainforest is between degrees F. 93-63 degrees F. Weather or Climate Weather or Climate Pic Credit
  5. 5. Earths Rotation & Tilt Unequal Heating of Earths •The earth is tilted on a 23.5o Surface axis •This causes the suns rays to heat the earths surface differently •Towards the equator there is less surface area that the sun rays are heating; compared to the northern or southern hemispheres. •In turn this leads to thePic Credit unequal heating of the earth
  6. 6. Earths Rotation & Tilt Cont. • As the earth Spins on its axis it also rotates the Sun Rotation and Tilt Cause Seasons on Earth • During rotation around the sun areas of the earth experience different intensities of sunrays • This causes the 4 seasons •The seasons deal highly with weather but also determine average precipitation and temperature rates forPic Credit climates.
  7. 7. Unequal Heating Creates Hadley Cells Hadley Cells •Smilar Cells form every 30o north and south of the equatorPic Credit
  8. 8. Hadley Cells Definition: 1. Hadley Cells: a pattern of atmospheric circulation in which warm air rises near the equator, cools as it travelspole-ward at high altitude, sinks as cold air, and warms as it travelsequator-ward •These cells are formed every 30 degrees in both directions from the equator •The combination of Hadley cells,Trade winds and topography make up the Earths Climates.http://www.merriam-webster.com/dictionary/hadley%20cell
  9. 9. Original Pic Credit Some ascending Some ascending air to the North Heavy air to the South RainfallDesert Forms Warm Warm Desert Formsdue to dry air air rises air rises due to dry airabsorbing absorbingmoisture moisture•Warm Moist air rises circulates N and S, then cools down.•Desert regions form due to the dry air falling and absorbing moisture fromthe ground•Air then circulates back to the equator were cycle starts again.
  10. 10. Unequal Heating Creates Hadley Cells Hadley Cells •Smilar Cells form every 30o north and south of the equatorPic Credit
  11. 11. Rough Distributions of Deserts Worldwide 30o N Equator 0o 30o SAs you can see deserts tend to form where Hadley cells circulate dry air in cyclesOriginal Pic Credit
  12. 12. All of These factors lead to the different types of climates that we see on earth today •The Koppen Climate Classification System, gives descriptions of about 5 climates. •These are:Pic Credit •DesertPic Credit •Tropical Rain ForestPic Credit •Cold/Ice ZonePic Credit •Continental ClimatesPic Credit •In Humid Middle Latitude
  13. 13. Climates are varied uniformly around the worldPic Credit
  14. 14. Types of ClimatesDesert: Generally very dry - Temperatures are very high during the day and fall real low during the night - Rainfall is very lowTropical Rain Forest: Moist environments- Temperature is very high - Rainfall is also highCold/Ice Zone: Permanent ice year-round -permafrostContinental Climates: Moderate conditions- temperatures very with the seasons- rainfall is also generally not very highIn Humid Middle Latitude: Land/water play important roles on one another - warm dry summers with cool wet winters.
  15. 15. Climates Lead to Different BiomesDefinition•Biomes: A large naturally occurring community of floraloccupying a major Habitat(Tundra, Taiga, Temperate Deciduous Forest, Temperategrasslands, Savanna Desert, and Tropical Rainforest. )•Climates determine whether or not a species can live in thatarea of the earth In the end climates control life around the world
  16. 16. Sources• http://www.blueplanetbiomes.org/climate.ht m• http://www.merriam- webster.com/dictionary/hadley%20cell