ICE TEMPERATURE OF GLACIERS IN CHINA
Huang Maohuan, Wang Zhongxiang and Ren Jiawen (Lanzhou Institute of Gladology and Cryopedology, Academia Sinca)
The ice temperature data of glaciers in China, collected from 1959 to 1978, are analysed. The ice temperatute in the maritime type glaciers .s equal to melting point or nearing it. The ice temperature in the continental type glaciers is quite low, especially the glaciers in the western section of Qilian Shan, where probably arises the lowest ice temperature of all alpine glaciers located in the middle and the low latitudes. But the temperature rises rapidly with depth. A major part of bottom in most continental type glaciers reaches pressure melting point, with basal sliding. The extreme huge valley glacier among them will change from cold glacier into temperate when it descends to the district where the climate is temperate. The ice temperature of the lower bound of active layer at the altitude of equilibrium line in continental type glaciers is 3.2-4.1℃ higher than the annual mean air temperature at the same level. The infiltration zone is warmed significantly by the infiltration and recongelation process. A scheme showing the lower bound temperature of active layer changing with glacial zones is drawn.