七大自然奇迹现象 7 Phenomenal Wonders
发布: 2009-1-20 10:56 | 作者: webmaster | 来源: 本站原创 | 查看: 147次
冰圈
当人们在全球各地的水域中发现奇特的圆圈状冰层时，产生的第一反应就是这可能是人为的杰作，科学家通常认为这种神秘的完美圆圈形状的冰层形成于水中的漩涡，一定直径尺寸大小的冰层以圆周旋转运动，作为最终的旋转结果，一些冰块和漂浮杂质在整体冰块的漩涡状运动中均匀地分布在冰层中，直到逐渐形成一个基本上的理想圆圈形状。目前发现的最大冰圈直径超过500英尺，此外人们在不同地点和时间发现不同直径大小的冰圈。
While many see these apparently perfect ice circles as worthy of conspiracy theorizing, scientists generally accept that they are formed by eddies in the water that spin a sizable piece of ice in a circular motion. As a result of this rotation, other pieces of ice and flotsam wear relatively evenly at the edges of the ice until it slowly forms into an essentially ideal circle. Ice circles have been seen with diameters of over 500 feet and can also at times be found in clusters and groups at different sizes as shown above.
