Meteorology Cont..

Meteorology Cont..Chapter 1210/10/11

Weather Cartoon

Cartoon

Coriolis effect The deflection of air caused by the Earth's rotation. To the right above the Equator To the left below the Equator

This combines with the heat imbalances found on Earth to create the various winds.1). Trade winds,2). Polar easterlies,3). Prevailing westerlies.

PredictionsIn what direction will a straight line turn when drawn from top to bottom on a page spinning clockwise?

In what direction will a straight line turn when drawn in the same direction if the paper is rotating in a counterclockwise direction.

Draw both predictions in your notebook.

Coriolis effect activityIn your group assign roles1). Holder Keeps poster board from moving2). Spinner (Need 2)Spin the poster board3). Line DrawerDraws while poster is spinning4). LabelerMarks the direction of rotation and path of line on the poster

Procedure1). Get in your groups

2). Find a free spot on the wall or whiteboardRight outside my door in the hall is OK

3). Holder: Place your finger in the center of the poster and hold tightly

4). Spinners: Practice rotating the poster against the wall

5). Line Drawer: Practice drawing straight from top to bottom while the spinners are spinning.

6). Once you feel comfortable, begin the experiment.

Procedure Continued7). Spinners turn the poster clockwise

8). Line drawer draws a line from top to bottom.

9). Once the line is finished labelers need to write the direction of spinning and place an arrow on the line.

10). Turn the poster over and repeat with counterclockwise spinning.

What did you get?Record your groups results in your notebook.

Check your predictionsWere they correct?

Independent Reflecting TimeHow would the spin of the Earth and the Coriolis Effect impact wind movement?

How should wind move in both hemispheres

Coriolis Effect All based on perspectivehttp://www.youtube.com/results?search_query=merry+go+round+coriolis&aq=0&oq=merry+go+round+corioOn the rotating object you see deflectionOff the rotating object, the ball appears to move in a straight line

Northern Hemisphere: Deflection always occurs to the right

Southern Hemisphere: Deflection always to the left

Wind Systems Cartoon

Why is wind important?Individual Reflection Time

Basic wind must knowsWind is named after where it is coming from.

Examples on Board

3 Main Types of Global WindNames3 Surface Winds1). Trade Winds

2). Polar Easterlies

3). Prevailing Westerlies

Trade Winds, Polar Easterlies, and Prevailing Westerlies Named after where the come fromRise at lows (usually warm places)Sink at highs (ususally cold places)

What is a trade wind?A global wind system that flows at 30 degrees north and south latitude, where air sinks, warms, and returns to the Equator in a westerly direction.

Cold Air Sinking at 300 and warm air rising at the equator; 00.

Label this on your diagram of the Earth

Trade windsWind deflecting toward the equator from 300 North or South

Why?This is where the warmest temperatures are .Remember Convection

Hit ITCZ- Band around the equator where air is converging/coming together.

What are the Prevailing Westerlies?A global wind system that lies between 30 and 60 degrees north and south latitude where surface air moves toward the poles in an easterly direction; blow from west to east.

Comes out at 300 and moves toward the poles at 600

Discuss where these winds should go on your diagram with your shoulder partnerLabel these on the Earth diagram.

Prevailing westerliesCalled a westerly because that is where the wind is blowing fromwest to east

Wind Deflects from 300 to 600

What are the polar easterlies?A global wind system that lies between 60 degrees latitude and the poles and characterized by very cold air.

Called Easterlies because they flow from the East to the West

Label the location of these on your Earth diagram.

Polar EasterliesWind is Deflecting from the Poles to 600.

Air is moving from a very cold location to one less cold

Cartoon

What is the jet stream?High-altitude, narrow, westerly wind band that occurs above large temperature contrasts and can flow as fast as 185 km/h.

Occur when winds meetVery different temperatures and pressures cause wind.