地球上的多雨带在哪里

2025-03-21 04:27:24
推荐回答(2个)
回答1:

地球表面的降水量分布极不均匀,降水与两个因素有关,一是大气中水汽的多少,二是大气中上升运动的强弱程度。全球降水量分布大体上是从赤道向极减少的,但在温带地区也有一个次多的雨季存在。

赤道地区有广阔的海洋,陆地上如亚马逊河流域、扎伊尔河流域和印度尼西亚等地,又分布着广阔的热带雨林,气温又高,蒸发强烈,大气中水分含量充足,对流上升运动发展旺盛。因此,在这一地区成为降水量最多的地带,年降水量一般为1000~2000毫米以上,太平洋的一些岛屿上可达5000~6000毫米。

从赤道向两极降水量渐渐减少,在南、北纬度约15~30°的热带和亚热带地区,由于下沉运动占优势,不利于云雨形成,降水量达到最小值,一般不到500毫米。地球上的沙漠多数都分布在这个地带。

在偏北一些纬度上,属于温带气候,是锋面气旋活动频繁的地方,暖空气沿锋面上升,降水又有增加,年降水量达500~1000毫米,成为地球上第二个多雨带。到了两极地区,温度低,水汽少,降水量显著减少,而且主要是降雪,极地也是地球上的少雨地带。

综上所述,地球上的多雨带有两个,赤道地带的降水最多,温带地区的降水次之。

回答2:

赤道

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