< p >哈得来环流圈是一个巨大的机器制造的空气。在业务结束在赤道太阳天顶跟踪,每天在超音速和加热大气的表层,而它的种族。这里没有问题的行星旋转感应科里奥利力对付,所以加热空气和水分丰富增加体积和密度的下降。最终它向上爆炸在一个巨大的组每日对流雷雨,到达平流层。猛烈的风暴,客机飞行员明智地避免。< / p > < p >潮湿的空气对流上升的细胞,它由绝热冷却转换KE PE和降水过程的介入(下雨)上升的空气会变干。在对流层顶空气有问题,它不能轻易回来,因为在提升它干涸了潜热(蒸汽的凝结,另外还冰晶的融合)。此外,潜热的水给它现在回到地面,所以当潮湿的空气冷却的绝热线在上升,这是被迫温暖干燥的绝热线的后裔。那么,你猜怎么着?下行干燥的空气下降时比下行温暖潮湿的空气通过相同的距离。< / p > < p >所以回到地面的空气怎样? Well, the only way to go is sideways, so it sets off on a long journey across the upper atmosphere towards the pole. Except it never gets there. Thanks to the Earth’s rapid rate of daily rotation the dry air is forced to track eastwards and eventually, in the Horse Latitudes it cannot go any further pole-ward, and so it is forced to descend. On forced descent the dry air will maintain a clear atmosphere, and so sunlight will be able to reach the ground more easily. At the surface the descended air creates a zone of high pressure before it sets off back to the equator as the surface Trade Winds. On crossing over the ocean, the Trade Winds pick up moisture from the water by forced evaporation of moving air, and eventually the now moisture rich air arrives back at the equator. Here in the Doldrums, it is now ready for the next daily passage of the solar zenith. It is then set off on its journey once again and forever through the cycle strokes of the giant Hadley cell convection machine.