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为什么会产生龙卷风?

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为什么会产生龙卷风?

龙卷风是个非常厉害的家伙,它里面的风速,往往大到每秒几十米到100米以上。龙卷风是空气里的旋涡。在发展qiang烈的积雨云中,空气扰动很厉害,里面温度、shi度、风向和风速差别很大。例如,下沉气liu风速往往达8级以上,而上升风速一般只有3-4级,这就使得积雨云内bu空气扰动剧烈,产生旋转作用,当旋转作用增大到一定程度时,就形成了龙卷风。还有,上下温度相差悬殊,冷空气急速下降,热空气猛烈上升,上下层空气jiao替扰动,形成许多小旋涡。这些小旋涡逐渐扩大,上下激dang越发厉害,终于形成了大旋涡,也会形成龙卷风。

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