一、副极地低气压带究竟是何成因?中学地理教材讲授“大气环流”时,对气压带和风带的成因有系统的论述。其中,人教版教材对副极地低气压带的成因是这样解释的:盛行西风与极地东风这两支冷暖性质不同的气流在北纬60°附近相遇,暖而轻的西风气流爬升到冷而重的东风气流之上,形成副极地上升气流。上升气流到高空,又分别流向副热带和极地上空,从而形成了中纬度与高纬度环流圈。由于副极地上升气流到高空即向南北方向流走,致使北纬60°附近的近地面气压降低,形成副极地低气压带。据此,有不少教师将气压带的成因总结为:赤道低 First, the sub-polar low pressure zone is what causes? Middle School geography teaching teaching “Atmospheric circulation ”, the pressure belt and the cause of the belt with a systematic exposition. Among them, the PEP teaching material explains the causes of the hypoxic zone in the subpolar region: the prevailing westerlies and polar easterly air currents of two different warm and cold qualities meet at a latitude of 60 ° N, the warm and light westerly airflow climbs to cold and heavy East wind flow above the formation of the vice pole up the air. Ascending air flow to high altitude, respectively, to the subtropical and polar over the sky, resulting in the latitude and high latitude circulation. As the ascending airstream of the vice pole flows to the north and south at high altitude, the pressure near the ground at a latitude of 60 degrees north latitude decreases and a low-pressure zone of the subpolar is formed. Accordingly, many teachers summarize the causes of the pressure belt as follows: the equator is low