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山谷风

山谷风是山风和谷风的合称,是大气环流的一种具体体现。在白天,山谷由于无法受到阳光照射,升温较慢,形成冷源,空气向山头移动,山谷地区形成上升气流,称为谷风;在夜晚,山头散热更快形成冷源,空气向山谷移动,山谷由于动力作用形成下沉气流,称为山风。[1]由于下沉氣流擠壓上升气流易遇冷成雨,山谷地区易形成“夜雨”景观。李商隐《夜雨寄北》中“巴山夜雨涨秋池”的原理即为山谷风。[2]拉萨降水多集中于夜晚的主要原因即为其位于山谷。[3]

参见

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参考文献

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  1. ^ 地理 普通高中课程标准实验教材. 人民教育出版社 (中文(简体)). 
  2. ^ 重难点手册RJ地理必修一. 华中师范大学出版社 (中文(简体)). 
  3. ^ 下列关于拉萨夜雨成因的正确解释是. [2016-07-25]. (原始内容存档于2016-08-16). 
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山谷风
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