A fourth inventory of Antarctic subglacial lakes
A fourth inventory of Antarctic subglacial lakes
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DOI：
10.1017/s095410201200048x
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发表时间：
2012-07
影响因子：
1.6
通讯作者：
Andrew Wright;M. Siegert
中科院分区：
文献类型：
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作者：
Andrew Wright;M. Siegert
摘要南极冰下湖泊的研究有三个主要的科学原因。首先，它们是基础水文系统的一个重要组成部分，众所周知，基础水文系统会影响冰盖的动态。其次，它们是地球上最极端的可行栖息地之一，第三，如果沉积物存在于它们的地板上，它们可能包含冰盖历史的高分辨率记录。在这里，我们提出了一个新的库存的位置，尺寸和数据来源的379个冰下湖泊。湖泊总数从2005年上一次清点时的145个增加到现在的145个，是由于几项重大进展。新的雷达数据集已收集在以前未开发的地区的冰盖，而数字数据收集和处理技术已允许改进湖泊识别方法。卫星测量冰下水运动引起的冰面高度变化在南极洲也很普遍，往往是在没有雷达数据的地方。这些进展改变了我们对南极冰下环境的认识，扩大了我们对冰下湖泊行为的理解。
Abstract Antarctic subglacial lakes are studied for three main scientific reasons. First, they form an important component of the basal hydrological system which is known to affect the dynamics of the ice sheet. Second, they are amongst the most extreme viable habitats on Earth and third, if sediments exist on their floors, they may contain high-resolution records of ice sheet history. Here we present a new inventory of locations, dimensions and data sources for 379 subglacial lakes. Several major advances are responsible for the rise in the total number of lakes from the 145 known at the time of the last inventory in 2005. New radar datasets have been collected in previously unexplored regions of the ice sheet while digital data collection and processing techniques have allowed improvements to lake identification methods. Satellite measurements of ice surface elevation change caused by the movement of subglacial water have also been found to be widespread in Antarctica, often in places where radar data are absent. These advances have changed our appreciation of the Antarctic subglacial environment and have expanded our understanding of the behaviour of subglacial lakes.