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Circulation of the Atmosphere
True or False



Select the correct response to each of the following true/false questions.

1 .       The general subsidence of air between latitudes 20° and 35° is responsible for the world's subtropical deserts, in particular, the Sahara Desert of northern Africa and the Great Australian Desert. 

 
 


2 .       A typical La Niña winter blows colder than normal air over the Pacific Northwest and northern Great Plains while warming much of the rest of the United States. 

 
 


3 .       Land and sea breezes, thunderstorms, and tornadoes are good examples of mesoscale winds. 

 
 


4 .       The North American monsoon produces a wet spring followed by a comparatively dry summer that impacts large areas of southwestern United States and northwest Mexico. 

 
 


5 .       The strength and location of Earth's pressure patterns vary during the course of the year. 

 
 


6 .       A sea breeze develops as warm air that forms over land moves onto the water. 

 
 


7 .       The average speed of the midlatitude jet stream is about 125 kilometers (75 miles) per hour in the winter and roughly half that speed in the summer. 

 
 


8 .       Because winds are a primary driving force of ocean currents, a relationship exists between the oceanic circulation and the general atmospheric circulation. 

 
 


9 .       The trade winds from both hemispheres meet near the equator in a region that has a weak pressure gradient called the horse latitudes. 

 
 


10 .       A country breeze is most associated with large expanses of forests in South America. 

 
 


11 .       In general, regions influenced by high pressure experience dry conditions. 

 
 


12 .       Nearly half of the world's population inhabits regions affected by monsoonal circulation. 

 
 


13 .       Upper-level wind charts reveal that the westerlies follow waves called Rossby waves, with rather long wavelengths of 4000 to 6000 kilometers. 

 
 


14 .       The polar easterlies and the westerlies clash to form a convergent zone known as the subpolar low. 

 
 


15 .       A three-cell circulation model of the atmosphere is a more realistic way to examine global circulation than a one-cell model. 

 
 


16 .       The midlatitudes receive most of their precipitation from traveling cyclonic storms. 

 
 


17 .       The seesaw pattern of atmospheric pressure between the eastern and western Pacific associated with major El Niño events is called the Southern Oscillation. 

 
 


18 .       In the Northern Hemisphere summer, low pressure replaces the winter highs over the continents. 

 
 






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