西藏的高原(TP ) 控制 1 万条高山的冰河中间纬度。他们最近与加速的撤退率缩小了。我们使用了 Regine 典当开发的一个分布式的温度索引 massbalance 模型,并且结合了在中央 TP 放大方法到小 Dongkemadi 冰河(XDG ) 的一个卷区域,到估计它的反应到气候变化。结果证明模仿的集体平衡在与观察的一个好协议(R 2=0.75, p < 0.001 ) 在 1989-2012 的时期期间。模仿的吝啬的年度团平衡(-213 公里 w.e ) 接近观察(-233 公里 w.e ) ,显示模型能被用来以后估计冰河变化。然后,模型被 RegCM4 的产量从 2013 ~ 2050 在气候情形 RCP4.5 和 RCP8.5 下面强迫。冰河的模仿的终点举起将在 2050 在 2013 ~ 5533 m a.s.l (RCP4.5 ) 和 5543 m a.s.l (RCP8.5 ) 从 5454 m a.s.l 升起。XDG 将与 600-700 m 3 的增加的率失去它的体积 -1 在 1989-2050 的时期期间,显示融化的水将提高河流量。要不是长期,对河流量的贡献将为冰河规模的收缩减少。
The Tibetan Plateau (TP) holds ten thousands of alpine glaciers in mid-latitude. They have shrunk with an accelerating retreat rate recently. We applied a distributed temperature-index massbalance model developed by Regine Hock, and coupled with a volume-area scaling method to Xiao Dongkemadi Glacier (XDG) in the central TP, to assess its response to climate change. The result shows the simulated mass balance is in a good agreement with observations (R2=0.75, p〈0.001) during the period of 1989-2012. The simulated mean annual mass balance (-213 mm w.e.) is close to the observation (-233 mm w.e.), indicating the model can be used to estimate the glacier variation in the future. Then the model was forced under the climate scenarios by the output of RegCM4 RCP4.5 and RCP8.5 from 2013 to 2050. The simulated terminus elevation of the glacier will rise from 5454 m a.s.1, in 2o13 to 5533 m a.s.1. (RCP4.5) and 5543 m a.s.1. (RCP8.5) in 2050. XDG will lose its volume with an increasing rate of 600-700 m3 a-1 during the period of 1989-2o5o, indicating the melting water will enhance the river runoff. But for the long term, the contribution to the river runoff will decrease for the shrinkage of glacier scale.