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Chapter 5 Weather. Solar Radiation Temperature Changes with Latitude Like equator Like at poles.

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Presentation on theme: "Chapter 5 Weather. Solar Radiation Temperature Changes with Latitude Like equator Like at poles."— Presentation transcript:

1 Chapter 5 Weather

2 Solar Radiation Temperature Changes with Latitude Like equator Like at poles

3 Seasonal Changes Temperature Changes with Season

4 The Atmosphere Nitrogen 78% Oxygen 21% CO 2.038% Carbon dioxide Argon Water vapor Pollutants Helium Etc. 1%

5 The Atmosphere

6 Atmospheric Circulation Circulation spawned by heating / cooling Prevailing winds: Generated by pressure differences and Coriolis effect

7 Coriolis Effect Southern Hemisphere

8 Coriolis Effect

9 Size of deflection is directly related to both the speed at which the air is moving and its latitude. The Coriolis force is zero right at the equator. The Coriolis force only acts on large objects like air masses moving considerable distances. Small objects, for example ships at sea, are too small to experience significant deflections. Gaspard de Coriolis (1792-1843)

10 Trade Winds

11 Horse Latitudes 30 degrees north (Horse latitudes) & 30 degrees south (Horse Latitudes) & Equator (Doldrums)

12 Fronts

13 1. A front is defined by temperature, relative humidity, and air pressure: 1. Temperature = the kinetic energy of a substance 2. Relative Humidity = is a function of temperature and water content 3. Air pressure = the weight of the atmosphere Warm Fronts 1. Retreating Cold fronts under advancing warm fronts are drawn out in a triangular fashion due to friction with the ground causing a triangular shape to the advancing warm front. 2. Warm fronts move towards the northeast 3. Warm fronts usually travel at about 15mph Cold Fronts 1. Cold fronts become rounded due to friction with the ground as they advance on warm fronts. 2. Cold fronts tend to move towards the east or southeast 3. Cold fronts usually advance at speeds of 20mph 4. Cold fronts may produce violent weather depending on their speed and air stability. 5. Faster moving cold fronts produce squall Lines Where high upper level winds stop a warm front from lifting up but whip up warm air ahead of the storm producing violent weather. Fronts

14 Pressure Systems (in the north) 1. Low Pressure systems rotate counter clockwise 2. High pressure systems rotate clockwise Jet Streams 1. Tend to follow the borders between warm and cold air 2. In the summer they are located further north and in the winter further south 3. Jet streams blow west to east in the northern and southern hemispheres 4. How are airline flights impacted by jet streams (speed and turbulence) Wind Shear 1.Is any sudden change in wind speed or direction causing, turbulence. Air Movement

15 The Global Ocean Patterns of Circulation in the Ocean Influenced by: 1. Coriolis Effect 2. Winds 3. Land Masses 4. Water Density

16 The Global Ocean Patterns of Circulation in the Ocean

17 The Global Ocean Vertical Mixing of Ocean Water


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