Where do tropical cyclones come from?

a. High pressure systems
b. Between air masses
c. Within a single warm and humid air mass
d. Within a single cool and dry air mass


ANS: C
Vilhelm Bjerknes realized tropical cyclones form due to disturbances within a single warm and humid
air mass. He also concluded extratropical air masses form between two air masses. Information can be
found in the section Storms Are Variations in Large-Scale Atmospheric Circulation

Environmental & Atmospheric Sciences

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Explain why this station experiences this climate. What are the contributing factors? Why is the summer so hot? Why is the winter so cold? What are two factors that reduce summer and winter PRECIP?


Oymyakon—Station # 3
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Indicate whether the statement is true or false

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Freezing rain requires that: a. the surface is colder than the air immediately above

b. the surface is warmer than the air immediately above. c. air temperatures must be above freezing at all altitudes. d. air temperatures must be below freezing at all altitudes.

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In what ways are weather conditions in the tropics and at middle latitudes different?

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