天气预报 > 其他 > 晴天和阴天哪个大气压大
晴天和阴天哪个大气压大
更新时间: 2020-09-15 00:00:00  

通常情况下,地面不断地向大气中进行长波有效辐射,同时大气也在不断地向地面进行逆辐射。晴天,地面的热量可以较为通畅地通过有效辐射和对流气层的向上辐散运动向外输运。阴天时,云层减少了对流层大气向外的辐散运动。云层这种保存地表和对液层热量的作用称为温室效应。这样,阴天地区的大气膨胀就比较厉害,从而导致阴天地区的大气横向向外扩散,使空气的密度减小,同时阴天地区大气的湿度比较大,也使大气的密度减小。所以晴天大气压大。

关键词: 晴天 阴天 哪个 大气压

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