Warm-up Page: 523, 1. The amount of solar energy reflected or absorbed depends on the, texture, composition, volume,, transparency and other properties. color mass Page: 523, 2. The fraction of solar radiation reflected from an object is called the. albedo Page: 523, 3.Warm air near the surface bends light rays to produce and image know as a. mirage
Warm-up Page: 526, 1. The transfer of energy as heat from one substance to another by direct contact is called. conduction Page: 526, 2. The process by which air rises and sinks because of temperature differences is called:. Convection Page: 527, 3.Air flows from pressure regions to pressure regions High, Low
Objective: S.W.B.A.T. Periods 3&5 -observe video on heat and transfer methods review -complete foldable on heat transfer methods -define conduction, convection, radiation Describe the global patterns of air circulation, and name three global wind belts. Identify two factors that form local wind patterns. Explain the Coriolis effect.
Activities: Warm-up Complete/review energy transfer Notes/discussions Finish heat transfer foldable Heat 1-4 h.w.
Atmospheric Circulation Sec. 19-3
How Air Moves Differences in air pressure are caused by unequal heating of Earth s surface.(causing convection) Hot air is rising at the equator creating a low pressure area. Cold air is sinking at both poles causing high pressure areas.
Air moves from areas of high pressure to areas of low pressure, causing a general, worldwide movement of surface air from the poles toward the equator. This, along with the Coriolis effect, creates wind patterns.
The Coriolis Effect Coriolis effect - the curving of the path of a moving object from an otherwise straight path due to Earth s rotation The Coriolis effect causes winds to be deflected by Earth s rotation. http://wn.com/what's_t he_coriolis_effect? Wi nds BBC_Fou
Each hemisphere contains three looping patterns of flow called convection cells. Global Winds
Global Winds Each convection cell correlates to an area of Earth s surface, called a wind belt, that is characterized by winds that flow in one direction. These winds are called prevailing winds. Winds are named from where the come from
1 st Global Wind Belt 1. Trade Winds the prevailing winds that blow from east to west from +/- 30º latitude to the equator in both hemispheres Trade Winds Inter-Tropical Convergence Zone Trade Winds
Doldrums area of rising air at the equator, where the surface winds are weak Sailing vessels sometimes would get trapped of days.
2 nd Global Wind Belt 2. Westerlies - prevailing winds that blow from west to east between 30º and 60º latitude in both hemispheres Polar Easterlies Westerlies Trade Winds Intertropical Convergence Zone Trade Winds Westerlies Polar Easterlies
Global Winds Jet Streams are a narrow band of strong winds that blow in the upper troposphere & lower stratosphere These wind exist in the Northern and Southern Hemispheres. they direct paths of weather
3 rd Global wind belt 3. Polar easterlies caused by cool air descending (sinking) from the poles and is turned by the Coriolis effect. Winds move from east to west
Global Winds
Cool down 1. Hot air rising and cool air sinking is what type of energy transfer? Convection 2. Heat moves around the world in ways. three
Cool down 1. How many total wind belt systems are on the Earth? 6 total - 3 in northern hemisphere & 3 in southern hemisphere 2. What is the name of the strong narrow band of wind in the upper atmosphere called? Jet stream