A stacked mixing sequence at the base of the Dye 3 core, Greenland
A stacked mixing sequence at the base of the Dye 3 core, Greenland
复制标题
DOI：
10.1029/98gl01411
复制
发表时间：
1998-06-01
影响因子：
5.2
通讯作者：
Jouzel, J
中科院分区：
文献类型：
--
作者：
Souchez, R;Bouzette, A;Jouzel, J
本文通过对Dye 3岩心基冰的详细同位素和气体组成的研究，证明了冰盖底部有很大程度的流体诱导混合作用。这种混合很可能是由于基岩起伏谷中的圆周运动和底部冰的一些夹带的水流分离造成的。测得的基冰中同位素和气体的分布是在基岩地形非常粗糙的地区发生的冰川上游连续混合事件的结果。所产生的变形使冰盖的底部有可能穿过Dye 3地区存在的冰下山谷。
This paper documents, by a detailed isotopic and gas composition study of the basal ice from the Dye 3 core, a large degree of flow-induced mixing at the ice sheet base. This mixing results most probably from circular motion in troughs of bedrock undulations and flow separations with some entrainment of the underlying ice. The measured distribution of isotopes and gases in the basal ice is the consequence of successive mixing events having occurred upglacier from the site in an area of very rough bedrock topography. The deformation produced makes it possible for the basal part of the ice sheet to cross the subglacial valley existing in the Dye 3 area.