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横断山区7条海洋型冰川近百年进退速度变化呈现出以退缩为总趋势的阶段性变化,具体表现为20世纪初至1930s的冰川稳定,1930s-1960s的冰川后退,1970s-1980s的冰川稳定或减速后退,20世纪80年代中期以来的冰川后退,这与我国、北半球及横断山区同期的气候变化呈明显对应,展现出冷干阶段冰川稳定或前进、暖湿阶段后退的态势,但各冰川的变化幅度因纬度位置、坡向、冰川规模、局地环境等而存在明显差异。1982/83年大、小贡巴冰川、海螺沟冰川冰舌段的消融水当量分别为2710mm、3139mm和5281mm,1990/91-97/98期间海螺沟冰川冰舌段的年均消融水当量为6157mm,比1982/83年增加了876mm。2002年夏季白水1号冰川的积雪消融量由于表碛覆盖较少表现出明显的随海拔升高而降低的特征,平均消融水当量为1086.25mm,2008.9.19-10.13期间白水1号冰川物质平衡花竿的观测表明,花竿布设区域10月6号左右转入物质积累期,期间日均积累深为1cm,折合水当量5mm。
The changes of the advancing and retreating velocities of seven marine glaciers in the past 100 years in the Hengduan Mountains show a gradual change taking the retreat as the general trend, which is manifested in the glacier stability from the early 20th century to the 1930s, the glacier retreat from 1930s to 1960s, the glacier stabilization from 1970s to 1980s or The retreat retreated and the glacier retreated since the mid-1980s. This shows a clear correspondence with the climate change over the same period in China, the Northern Hemisphere and Hengduan Mountains, which shows that the glaciers in the cold and dry phases are stable or advancing and the warm and wet phases recede. However, The magnitude of change is obviously different due to latitude location, aspect, glacier scale and local environment. In 1982/83, the ablation water equivalent of the glacier tongue segments of the Xiaogongba glacier and Hailuogou glacier were 2710mm, 3139mm and 5281mm, respectively. The mean annual ablation water equivalent of the ice tongue of Hailuogou glacier between 1990 / 91-97 / 98 was 6157mm, an increase of 876mm over 1982/83. During the summer of 2002, the amount of snow melting of Baishui 1 glacier showed less obvious decrease with elevation due to less cover of moraine, and the average ablation water equivalent was 1086.25 mm. During the period of September 19, The observation of the balanced flower pole showed that the flower pole layout area was transferred to the material accumulation period around October 6, during which the average daily accumulation depth was 1 cm and the equivalent water equivalent was 5 mm.