青藏高原中部扎当冰川物质平衡研究

Mass Balance of the Zhadang Glacier in the Central Tibetan Plateau

最新观测表明,青藏高原扎当冰川2005/2006年度物质平衡量为-306.42×104m3,相当于-1547.57 mm水当量,冰面出现显著的减薄.扎当冰川出现如此大的负平衡在青藏高原中部地区实属罕见,这可能与影响冰川物质平衡过程的区域气候状况和局地气候因素的差异有关系.物质平衡出现较大的负值和零平衡线位置升高的状况,强烈反映了扎当冰川对气候变暖过程的响应.

New observations have been made on the Zhadang Glacier in Nyainqentanglha Rang in 2005/ 2006. Based on the observation, the mass balance of the glacier was calculated to be negative, --1 547.57 mm（mm w.e.）, suggesting that the glacier was thinning dramatically. In 2005/2006, the glacier was characterized by strong negative mass balance with a rising snow line. Both the mass balance and snow line respond sensitively tc the global warming. It is infrequent that a large negative mass balance of glacier in the Central Tibetan Plateau like the Zhadang Glacier. With the global warming, it is expected that the glacier will experience negative mass balance shrinking and snow line rising.