南极冰下湖的发现及其意义

A PRIMARY INTRODUCTION OF ANTARCTIC SUBGLACIAL LAKES

通过分析航空６０ＭＨｚ无线电回波数据，目前在南极已发现７７个冰下湖。其中，最著名的是Ｖｏｓｔｏｋ湖。这些湖泊主要是由于地热流，以及冰层底部滑动和冰内变形产生的热量，使冰盖底部冰温上升到压融点，并缓慢融化冰层形成的。冰下湖的发现具有冰川学、地质学，尤其是潜在的重要的生物学意义。

?7 Antarctic subglacial lakes were identified at present by analysing airborne radioecho sounding records. The most wellknown among these is the Vostok Lake. The formation of subglacial lakes results mainly from geothermal flux and partially from heat produced from basal sliding and internal ice deformation,which raise the temperature of the basal ice to melting point and gradually melt the ice. The discovery of subglacial lakes has glaciological,geological,and especially,potential biological implications.