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青藏高原冻土区是一个突出在中、低纬度的巨大的“冻土岛”,是一个统一的冰缘地貌单元。它有适合于多种冰缘现象发育的良好气候条件。目前已知世界上50余种冰缘现象,除少数发育于极地区的类型(如冰楔多边形等)外、本区都有。这种情况是罕见的。经过近几年的
The permafrost region of the Qinghai-Tibet Plateau is a huge “frozen soil island” that highlights the middle and low latitudes and is a unitary unit of the ice margin landscape. It has a good climatic conditions suitable for the development of a variety of ice edge phenomenon. At present, there are more than 50 kinds of ice edge phenomena in the world, with the exception of a few types (such as ice wedge polygons) developed in the polar region. This situation is rare. After recent years