作业帮风的自然现象jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/14 19:29:11
风的自然现象jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
风的自然现象
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
风的自然现象jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
大气为什么会运动?是什么力量驱使它运动的呢?原因是错综复杂的.水平的风,垂直的升降气流,不规则的乱流运动,都各有其复杂的成因.这里先就风的成因谈起吧.
自从十七世纪出现了气压表,指出空气有重量因而有压力这个事实以后,为人们寻找风的奥秘提供了开窍的钥匙.十九世纪初,有人根据各地气压与风的观测资料,画出了第一张气压与风的分布图.这种图不仅显示了风从气压高的区域吹向气压低的区域,而且还指明了风的行进路线并不直接从高气压区吹向低气压区,而是一个向右偏斜的角度.
一百多年来,人们抓住气压与风的关系这一条从实践中得来的线索,进一步深入探究,总结出一套比较完整的关于风的理论.风朝什么地方吹?为什么风有时候刮起来特别迅猛有劲,而有时候却懒散无力,销声匿迹?这完全是由气压高低、气温冷暖等大气内部矛盾运动的客观规律在支配着的.人们不仅用这种规律来解释风的起因,而且还用这些规律来预测风的行踪