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C. Give reasons.1. North America receives rainfall during summer |
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Answer» The North American monsoon is associated with an area ofhigh pressurecalled thesubtropical ridgethat moves northward during the summer months and athermal low(a trough of low pressure which develops from intense surface heating) over the Mexican Plateau and the Desert Southwest of the United States.[3]The monsoon begins in late May to early June in southern Mexico and quickly spreads along the western slopes of the Sierra Madre Occidental, reachingArizonaandNew Mexicoin early July. The monsoon extends into the southwest United States as it matures in mid-July, when an area of high pressure, called the monsoon or subtropical ridge, develops in the upper atmosphere over theFour Cornersregion, creating wind flow aloft from the east or southeast. |
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