The Stability of Ice-Dammed Lakes and other Water-Filled Holes in Glaciers
The Stability of Ice-Dammed Lakes and other Water-Filled Holes in Glaciers
复制标题
冰堰湖和冰川中其他充水洞的稳定性
作者：
J. Glen
众所周知，冰川上的空洞如果超过15 ~ 20米就会被填满。深，由于应变率与剪切应力的快速变化。本文指出，如果一个充水的洞或湖超过150 ~ 200米，它也会以同样的机制扩大自己。深这种现象被认为是一些冰川湖周期性完全排空的原因，例如据报道，不列颠哥伦比亚省的Tulsequah湖以及冰岛的Graenalón和Grilmsvötn。
Abstract It is well known that an empty hole in a glacier will fill in if it is more than some 15 to 20 m. deep, due to the rapid variation of strain rate with shear stress. It is pointed out that a water-filled hole or lake will tend to enlarge itself by the same mechanism, if it is more than 150 to 200 m. deep. This phenomenon is believed to be responsible for the periodical and complete emptying of some glacier lakes, such as has been reported for the Tulsequah Lake in British Columbia, and Graenalón and Grilmsvötn in Iceland.