Question 1

A building anticyclone means

Accepted Answer

A)   the central pressure is increasing.
B)   the anticyclone is moving toward the east coast.
C)   separate anticyclones are merging.
D)   the anticyclone is causing a middle latitude storm to form.

Question 2

On a surface weather map that shows an open wave cyclone,the warm sector can be observed

Accepted Answer

A)   ahead of an advancing cold front.
B)   behind an advancing cold front.
C)   ahead of an advancing cold-occluded front.
D)   behind an advancing cold-occluded front.
E)   ahead of an advancing warm front.

Question 3

Rossby waves are also known as

Accepted Answer

A)   stable waves.
B)   shortwaves.
C)   tidal waves.
D)   longwaves.

Question 4

Which of the scientists below was not one of the meteorologists who helped develop the polar front theory of a developing wave cyclone?

Accepted Answer

A)   B.Bjerknes
B)   C.G.Rossby
C)   T.Bergeron
D)   H.Solberg
E)   J.Bjerknes

Question 5

A surface low pressure area with a deep upper-level trough to the west will tend to move toward the

Accepted Answer

A)   northwest.
B)   northeast.
C)   southwest.
D)   southeast.

Question 6

Which region is not considered to be a region where cyclogenesis often occurs?

Accepted Answer

A)   eastern slopes of the Rocky Mountains
B)   Atlantic Ocean near Cape Hatteras,North Carolina
C)   California
D)   Great Basin of the United States
E)   Gulf of Mexico

Question 7

A lee-side low forms

Accepted Answer

A)   over the central Pacific Ocean.
B)   near the equator.
C)   on the upwind side of a mountain.
D)   on the downwind side of a mountain.

Question 8

The development or strengthening of a middle latitude storm system is called

Accepted Answer

A)   convergence.
B)   divergence.
C)   cyclogenesis.
D)   frontolysis.

Question 9

Which of the following statements is not correct about vorticity?

Accepted Answer

A)   The earth's vorticity in the Northern Hemisphere is positive.
B)   The earth's vorticity is zero at the poles.
C)   Air that spins cyclonically possesses positive vorticity.
D)   Absolute vorticity is the sum of the earth's vorticity and the relative vorticity.

Question 10

Cyclogenesis often occurs in regions without horizontal temperature gradients.

Accepted Answer

A) True 
 B)False

Question 11

Lee-side lows are

Accepted Answer

A)   storms (extratropical cyclones) that form on the eastern (lee) side of a mountain range.
B)   thermal lows that form due to surface heating over deserts.
C)   storms (tropical cyclones) that form near the Leeward Islands.
D)   low pressure areas that form over oceans,then move onshore of the lee side of the coastline.

Question 12

A small,moving disturbance imbedded in a longwave is called

Accepted Answer

A)   a lee-side low.
B)   a wave cyclone.
C)   a shortwave.
D)   a frontal wave.

Question 13

When upper-level divergence of air above a surface low pressure area is stronger than the convergence of surface air,the surface pressure will ____ and the storm itself will ____.

Accepted Answer

A)   increase,intensify
B)   increase,dissipate
C)   decrease,intensify
D)   decrease,dissipate

Question 14

The planetary vorticity of an air parcel moving from low toward high latitude in the Northern Hemisphere will

Accepted Answer

A)   increase.
B)   decrease.
C)   remain constant.
D)   change from positive to negative.

Question 15

Vorticity refers to

Accepted Answer

A)   the rising and sinking of air along weather fronts.
B)   the formation of clouds.
C)   the spin of air parcels.
D)   the changing of the seasons.
E)   the development of a wave cyclone.

Question 16

For a surface storm system to intensify,the upper-level low (or trough) should be located to the ____ of the surface low.

Accepted Answer

A)   north
B)   south
C)   east
D)   west

Question 17

Longwaves in the middle and upper troposphere usually have lengths on the order of

Accepted Answer

A)   tens of kilometers.
B)   hundreds of kilometers.
C)   thousands of kilometers.
D)   millions of kilometers.

Question 18

Like hurricanes,polar lows have a clear area in their center.

Accepted Answer

A) True 
 B)False

Question 19

According to the model of the life cycle of a wave cyclone,the storm system is normally most intense

Accepted Answer

A)   as a frontal wave.
B)   as a stable wave.
C)   as an open wave.
D)   as a stationary wave.
E)   when the system first becomes occluded.

Question 20

An upper-level trough that shows retrograde motion would probably be moving toward the

Accepted Answer

A)   west.
B)   east.
C)   north.
D)   south.

Exam 12: Middle-Latitude Cyclones

Which region is not considered to be a region where cyclogenesis often occurs?

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A lee-side low forms

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An upper-level trough that shows retrograde motion would probably be moving toward the

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A surface low pressure area with a deep upper-level trough to the west will tend to move toward the

Correct AnswerverifiedShow Answer

Vorticity refers to

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Rossby waves are also known as

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Lee-side lows are

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When upper-level divergence of air above a surface low pressure area is stronger than the convergence of surface air,the surface pressure will ____ and the storm itself will ____.

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Longwaves in the middle and upper troposphere usually have lengths on the order of

Correct AnswerverifiedShow Answer

Like hurricanes,polar lows have a clear area in their center.

Correct AnswerverifiedShow Answer

The development or strengthening of a middle latitude storm system is called

Correct AnswerverifiedShow Answer

Which of the following statements is not correct about vorticity?

Correct AnswerverifiedShow Answer

Cyclogenesis often occurs in regions without horizontal temperature gradients.

Correct AnswerverifiedShow Answer

A building anticyclone means

Correct AnswerverifiedShow Answer

For a surface storm system to intensify,the upper-level low (or trough) should be located to the ____ of the surface low.

Correct AnswerverifiedShow Answer

A small,moving disturbance imbedded in a longwave is called

Correct AnswerverifiedShow Answer

According to the model of the life cycle of a wave cyclone,the storm system is normally most intense

Correct AnswerverifiedShow Answer

Which of the scientists below was not one of the meteorologists who helped develop the polar front theory of a developing wave cyclone?

Correct AnswerverifiedShow Answer

On a surface weather map that shows an open wave cyclone,the warm sector can be observed

Correct AnswerverifiedShow Answer

The planetary vorticity of an air parcel moving from low toward high latitude in the Northern Hemisphere will

Correct AnswerverifiedShow Answer

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When upper-level divergence of air above a surface low pressure area is stronger than the convergence of surface air,the surface pressure will and the storm itself will .

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