格陵兰岛Ice Sheet由于表面融水引起的基底滑动加速的衰减
Decay of the Greenland Ice Sheet due to surface-meltwater-induced acceleration of basal sliding
摘要：
格陵兰冰盖的模拟进行了高分辨率版本的冰盖模型SICOPOLIS为1990年至2350年期间的几个全球变暖的情况。特别是，表面融水引起的加速基底滑动的冰盖的稳定性的影响进行了研究。的加速效应的参数化的建模和测量的质量损失的冰盖在21世纪初同意。模拟的主要结果是：（i）冰盖通常很容易受到几个世纪时间尺度上的全球变暖的影响，（ii）表面融水引起的基底滑动加速导致冰流和出口冰川的明显加速，（iii）这种冰动力效应显著加速了整个格陵兰冰盖的衰退，但不是灾难性的，在21世纪及以后。
英文摘要：
Simulations of the Greenland Ice Sheet are carried out with a high-resolution version of the ice-sheet model SICOPOLIS for several global-warming scenarios for the period 1990-2350. In particular, the impact of surface-meltwater-induced acceleration of basal sliding on the stability of the ice sheet is investigated. A parameterization for the acceleration effect is developed for which modelled and measured mass losses of the ice sheet in the early 21st century agree well. The main findings of the simulations are: (i) the ice sheet is generally very susceptible to global warming on time-scales of centuries, (ii) surface-meltwater-induced acceleration of basal sliding leads to a pronounced speed-up of ice streams and outlet glaciers, and (iii) this ice-dynamical effect accelerates the decay of the Greenland Ice Sheet as a whole significantly, but not catastrophically, in the 21st century and beyond.
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