Distribution of ice marginal moraines in NW Russia
Distribution of ice marginal moraines in NW Russia
复制标题
俄罗斯西北部冰缘冰碛的分布
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
A. Lyså
中科院分区：
文献类型：
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作者：
O. Fredin;L. Rubensdotter;Aurélien van Welden;E. Larsen;A. Lyså
在这里，我们介绍了一个关于俄罗斯西北部冰川末端冰川地带分布的测绘项目的结果，该项目覆盖了从西部波罗的海(30°E)到东部(120°E)泰米尔半岛和Byrranga山脉的区域。此前已在该地区进行了几项研究，但没有一项研究以统一的方式绘制了整个油田地区的冰川末端地带。我们认为，我们绘制的覆盖约700万平方公里的俄罗斯西北部冰雹分布图是迄今为止最一致的。测绘区域大部分位于北纬60°以北，因此不在高质量航天飞机雷达地形飞行任务数字高程模型的覆盖范围之内。我们一直在使用一个新的数字高程数据集，该数据集由数字化的俄罗斯地形图(比例尺为1：100,000和1：200,000)组成，并结合光学遥感数据绘制冰川带分布图。这项研究中绘制的冰原地貌图与最近重建的该地区以前的冰盖范围基本一致。然而，已经发现了几个以前没有记载的冰雹，我们的结果表明，最后一次冰期最大的斯堪的纳维亚冰盖可能比之前认为的向东延伸到俄罗斯更远。在其他地区，我们也为以前的冰盖范围添加了相当多的细节。
Here we present results from a mapping project on the distribution of glacial end moraine zones in NW Russia, covering an area from the Baltics in the west (30°E) to Taymyr Peninsula and Byrranga mountains (120°E) in the East. Several previous studies have been made in the area, but none have mapped end moraine zones in a uniform way over the whole field area. We suggest that our mapping of moraine distribution in NW Russia, covering an area of about 7 million km2 is the most consistent to date. Much of the mapped area lies north of 60°N and is thus outside coverage of the high-quality Shuttle Radar Topography Mission digital elevation model. We have been using a new digital elevation data-set consisting of digitized Russian topographic maps (scales 1:100,000 and 1:200,000), combined with optical remote sensing data to map moraine zone distribution. The mapped moraines in this study are largely in agreement with recent reconstructions of former ice sheet extent in the area. However, several previously undocumented moraines have been identified and our results show that the last glacial maximum Scandinavian ice sheet probably extended further east into Russia than previously thought. In other areas, we also add considerable more detail on former ice sheet extent.