CHINA'S ANTI-SEASON ICE CAVES AND THEIR MECHANISM

A dynamic ice cave (DIG) is a natural phenomenon: the ice in the caves freezes in midsummer or late spring rather than in winter. It is created by the unique local geological structure. DICs are important tourism resources; actually, during recent years, they have been developed in varying degrees. Due to tourism exploitation or other unknown factors, some DICs in China are suffering a recession. To reveal the mechanism of DICs' operation can help with their protection and save them from destructive exploitation. In this paper, the geographical distribution of China's DICs is given in the first part. Then the influencing factors of the nature ventilation of DIG, the transition mechanism between two seasons of DIG, the interesting relation between the temperatures of warm cave and outside air was analyzed.