Page: 523, 1. The amount of solar energy reflected …...name three global wind belts. •Identify two factors that form local wind patterns. •Explain the Coriolis effect. Activities:

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?__Winds__BBC_Fou

Global Winds

Each hemisphere contains three looping patterns of flow called

convection cells.

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

1st Global Wind Belt 1. Trade Winds – the prevailing winds that blow from

east to west from +/- 30º latitude to the equator in both hemispheres

Inter-Tropical Convergence Zone

Trade Winds

Trade Winds

Doldrums – area of rising air at the equator, where the surface winds are weak – Sailing vessels sometimes would get trapped of days.

2nd Global Wind Belt 2. Westerlies - prevailing winds that blow from west to

east between 30º and 60º latitude in both hemispheres

Intertropical Convergence Zone

Trade Winds

Trade Winds

Westerlies

Westerlies

Polar Easterlies

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

3rd 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