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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >The termination of the last major phase of aeolian sand movement, coastal dunefields, Denmark
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The termination of the last major phase of aeolian sand movement, coastal dunefields, Denmark

机译:丹麦沙丘沿海风沙运动的最后一个主要阶段的终止

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Optically stimulated luminescence (OSL) dating of sand samples from stabilized (or inactive) coastal dunes in Denmark provides information on the age of the termination phase of the last major aeolian activity period. A total of 26 sand samples were taken from four different coastal dunefields around the North Sea, Skagerrak and Kattegat coasts of Denmark. The OSL dates indicate that the last major phase of aeolian activity terminated between AD 1860 and 1905. Most of the dunes examined in this study were active around 1820, during a period documented to have been very stormy. A dune management scheme started around 1792, and this no doubt was a major cause of dunefield stabilization, but an overall decline of storminess, particularly spring and summer storminess, around the end of the 19th century must also have contributed to the increasing inactivity of coastal dunes. The new OSL dates on aeolian sand movement agree well with historical data and data from topographic maps on dune movement. This agreement supports the observation from earlier work that OSL dating of recent aeolian sand movement is accurate over the last few decades to centuries. Copyright (c) 2005 John Wiley & Sons, Ltd.
机译:来自丹麦稳定的(或非活动的)沿海沙丘的砂样品的光刺激发光(OSL)测年提供了有关上一个主要风沙活动期终止阶段的年龄信息。从丹麦北海,Skagerrak和Kattegat海岸周围的四个不同的沿海沙丘地带总共采集了26个砂样。 OSL日期表明,风沙活动的最后一个主要阶段在公元1860年至1905年之间结束。本研究中研究的大多数沙丘在1820年左右都处于活跃状态,据记录,这一时期风雨如磐。沙丘管理计划始于1792年左右,这无疑是沙丘保持稳定的主要原因,但是19世纪末左右的暴风雨,尤其是春季和夏季暴风雨的总体下降,也必定导致了沿海地区日益缺乏活动沙丘。风沙运动的新OSL日期与历史数据和沙丘运动地形图的数据非常吻合。该协议支持早期工作的观察结果,即最近几十年来至几个世纪以来,最近风沙运动的OSL测年是准确的。版权所有(c)2005 John Wiley&Sons,Ltd.

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