atmosphere & climatology section 5 MCQ Questions & Answers Detailed Explanation

Answer: (b)

Mist is a thin fog resulting from condensation in the air near the earth’s surface.

Answer: (d)

Answer: (b)

• The Santa Ana winds are strong, extremely dry down-slope winds that originate inland and affect coastal Southern California and northern Baja California.
• A Chinook wind is a weather phenomenon that creates warm, dry air that blows down the eastern slopes of the Canadian Rockies. The name Chinook means “snow eater,” as the wind occurs most frequently in winter and can disrupt snowstorms and melt fallen snow.
• A föhn or foehn is a type of dry, warm, down-slope wind that occurs in the lee (downwind side) of a mountain range. Föhn can be initiated when deep low pressures move into Europe drawing moist Mediterranean air over the Alps. Zonda wind is a regional term for the foehn wind that often occurs on the eastern slope of the Andes, in Argentina.
• The Zonda is a dry wind (often carrying dust) that comes from the polar maritime air, warmed by descent from the crest, which is approximately 6,000 m (20,000 ft) above sea level.

Answer: (a)

Answer: (a)

The well known Polar-front theory was described by the Bergen school early 20th century. The theory explains the formation, development and life cycles of cyclones.

In short several stages of cyclone development can separately be identified. The polar front arises as a result of cold polar air meeting warm tropical air.

It is a stationary front as the air masses are not moving against each other. Off the coast of eastern North America, especially in winter, there is a sharp temperature gradient between the snow-covered land and the warm offshore currents.

Answer: (c)