一般来说,在锋面天气系统中,气压由低到高,是锋前降水,气温在锋面过境后降低为冷锋；气压由高到低,则是锋后降水,气温在锋面过境后升高,为暖锋.
在地球的大气环流中,气压低,是由于气流膨胀或者动力上升,一般是多雨的天气；气压高,是由于气流收缩或者动力下沉,一般是干旱的天气.
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