What features in Earth's general circulation help determine where the driest and wettest places on Earth are found??
What will be the ideal response?
ANSWER: The position of the major features of the general circulation and their latitudinal displacement (which annually averages about 10 degrees to 15 degrees) strongly influence the precipitation of many areas. On the global scale, abundant rainfall occurs where the air rises and very little where the air sinks. Consequently, areas of high rainfall exist in the tropics, where humid air rises in conjunction with the ITCZ, and between about 40 degrees and 55 degrees latitude, where middle-latitude cyclonic storms and the polar front force air upward. Areas of low precipitation are found near 30 degree latitude in the vicinity of the subtropical highs and in polar regions where the air is cold and dry.
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