& G G$ S; {" q2 H0 W: u公仔箱論壇Penitentes – Snow is usually white, soft and delicate. However, at 4.000 m altitude in the Dry Andes you’ll come across one of the world’s most unusual phenomenon, namely the knife shaped snow blocks. The process is fairly simple and it happened because of the wind who managed to compile the snow into blocks. Further on, the sun melted the snow and the appearance of these Penitentes came outtvb now,tvbnow,bttvb! x! z& T' a, W# X0 ^ TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。3 M {2 ~: b. c9 @4 E% z) {. O3 A) l2 l: D; `+ J) k
这种特别长的雪卷相当罕见，而且很短命。在雪卷滚动过程中，重量会越来越大，重力和地面积雪的阻力迟早会抵消风力和惯性作用，并最终让雪卷停止下来。tvb now,tvbnow,bttvb T1 \0 J# |1 Z / @% x" i' L6 l- ~" m( E9 t& x2 f8 D* G5 G9 K
大多数雪卷都有一个共同的特点，那就是在其中心有一个“像油炸圈饼一样的小孔”。
發表於 2013-1-8 08:20 AM
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發表於 2013-1-8 09:41 AM
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