ABSTRACT A 1:14 500 scale glacial geomorphology and surficial geology map of the foreland of Hoffellsjökull, southeast Iceland is used to assess the glacial landsystem signature of the contrasting glacier-climate interactions of two separate flow lobes within one outlet glacier. This constitutes a valuable modern analogue for employing glacial geomorphological signatures as palaeoclimate indicators in ancient deglaciated terrains. The landsystem signatures of the glacier’s two flow lobes, Svínafellsjökull and Hoffellsjökull, are distinctly different. Svínafellsjökull displays inset and seasonally climatically-tuned push moraine sequences and subglacially streamlined surfaces typical of active temperate glaciers on sloping piedmont forelands. Hoffellsjökull displays the landform-sediment assemblages typical of outwash-head/depositional overdeepening scenarios, upon which closely-spaced composite push moraines reflect a long term quasi-stationary snout at and near the Little Ice Age maximum prior to 2000. Moraine spacing on the Svínafellsjökull foreland reflects an overall trend of annual recession punctuated by quasi-stability and/or readvance in the mid-1950s-1960 and 1975–2000 as recorded by two arcuate zones of closely-spaced and partially overprinted sawtooth and hairpin moraines. The pattern of moraine distribution here also reflects spatio-temporal changes in moraine-forming processes as dictated by changes in a combination of proglacial drainage characteristics and structural glaciology or crevasse architecture. The subglacial footprint of the Svínafellsjökull foreland contains features worthy of future research attention, including an arcuate zone of overridden moraines potentially indicative of a regional Holocene ice advance, prominent flutings and debris stripes potentially indicative of groove-ploughing and point-source bedrock plucking respectively, and relatively large drumlins.

中文翻译：

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冰岛东南部 Hoffellsjökull 的冰川陆地系统：由冰叶和河床形态驱动的活动温带冰川退缩的对比地貌特征

摘要 冰岛东南部 Hoffellsjökull 前陆的 1:14 500 比例冰川地貌和地表地质图用于评估一个出口冰川内两个独立流瓣的对比冰川-气候相互作用的冰川陆地系统特征。这构成了一个有价值的现代类比，用于将冰川地貌特征用作古代冰川消融地形的古气候指标。冰川的两个流瓣 Svínafellsjökull 和 Hoffellsjökull 的陆地系统特征明显不同。Svínafellsjökull 展示了插图和季节性气候调整的推冰碛序列和冰下流线型表面，这些表面是倾斜的山前前陆活跃温带冰川的典型特征。Hoffellsjökull 展示了典型的外冲水头/沉积过度加深情景的地形-沉积物组合，在这种情况下，紧密间隔的复合推冰碛反映了 2000 年之前小冰河时代最大值及其附近的长期准静止鼻子。Svínafellsjökull 上的冰碛间距前陆反映了 1950 年代中期至 1960 年和 1975 至 2000 年期间准稳定和/或重新上升的年度衰退的总体趋势，这由两个紧密间隔和部分叠印的锯齿和发夹冰碛的弓形区域记录。这里的冰碛分布模式也反映了冰碛形成过程的时空变化，这是由前冰川排水特征和结构冰川学或裂缝结构的组合变化所决定的。