Sedimentary architecture and genesis of residual dune ridges in a temperate climate are presented and implications for their use as archive of changes in long-term precipitation and wind climate are discussed. Residual dunes are common features of wet aeolian systems, where they form sets of shallow ridges, oriented perpendicular to the prevailing wind direction. Residual dune ridges of the study area are vegetated and typically elevate 0.6 to 2.5 m above the surrounding interdune flats. They develop on the lower stoss side of active transgressive dunes, triggered by periods of elevated groundwater table and hence colonization of the foot of the dune by rapid growing pioneer vegetation. Stabilized by plants, the growing ridge detaches from the active transgressive dune and gets abandoned within years in the course of the downwind-migration of the transgressive dune. Grain-size data suggest a main sediment supply from the transgressive dune and only minor input from other sources. Ground-penetrating radar reveals that the residual dune ridges are composed of windward-dipping as well as leeward-dipping sedimentary beds. Leeward-dipping strata reflect sediment supply from the parental dune, whereas windward-dipping beds are seen to result from sediment redistribution along the ridge and sediment supply from the adjacent swales during the ridge growth period. Multi-annual to multi-decadal variability in precipitation leads to the development of sequences composed of tens of ridges, spanning time periods of several centuries. Spacing of individual ridges in these sequences is controlled not by long-term variability in precipitation alone, but probably also reflects variable wind intensity which affects the migration rate of the parental dune. The important role of vegetation in ridge construction makes these landforms a demonstrative example of landscape development by geo-biosphere interacting processes.

中文翻译：

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残余沙丘脊：沉积结构、成因和对古气候重建的影响

介绍了温带气候中残留沙丘脊的沉积结构和成因，并讨论了将它们用作长期降水和风气候变化档案的意义。残留沙丘是湿风成系统的共同特征，它们形成多组浅脊，垂直于盛行风向。研究区残留的沙丘脊是植被，通常比周围的沙丘间平面高 0.6 至 2.5 m。它们在活跃的海侵沙丘的较低沙丘上发育，这是由地下水位升高的时期引发的，因此沙丘脚被快速生长的先驱植被殖民化。植物稳定，生长的山脊脱离活跃的海侵沙丘，并在海侵沙丘的顺风迁移过程中在数年内被遗弃。粒度数据表明主要来自海侵沙丘的沉积物供应和来自其他来源的少量输入。探地雷达显示，残余沙丘脊由迎风和背风沉积层组成。背风倾斜地层反映了母沙丘的沉积物供应，而向风倾斜床被认为是由在山脊生长期间沿山脊的沉积物重新分布和来自相邻洼地的沉积物供应造成的。降水的多年至多年变化导致了由数十个山脊组成的序列的发展，跨越了几个世纪的时间段。这些序列中各个山脊的间距不仅受降水的长期变化控制，而且可能还反映了影响母沙丘迁移速率的可变风强度。植被在山脊建设中的重要作用使这些地貌成为通过地球生物圈相互作用过程进行景观发展的示范例子。