The temporal variability in sediment export yield from glaciers over a timescale of multiple glacial cycles (e.g. 1 × 10² − 1 × 10⁶ years) is of interest for a wide range of applications in glaciology, sedimentology, geomorphology, climatology and environmental engineering. However, the time required for the products of glacial erosion to be transferred through glaciated catchments and the extent to which glacially-conditioned sediment can be transiently stored within them are still poorly constrained and a matter of debate within the community. We propose a conceptual model of the variability in sediment exported from glaciers over multiple glacial cycles based on a literature review. Sediment yield is likely to be highly variable through a glacial cycle, notably between phases of glacier advance, retreat and re-advance due to changes in ice velocity and erosion rates, ice and meltwater transport capacity, and in glacially-conditioned sediment accessibility at the bed. Typically, early phases of glacier retreat and re-advance are expected to lead to the highest increase in sediment yield due to the ease with which the products of bedrock erosion can be accessed and reworked. In contrast, later phases of glacial (re)advance, once glacially-conditioned sedimentary sources become exhausted, may be characterized by intermediate rates of sediment export yield maintained through bedrock erosion. The latest phases of deglaciation, once glacially-conditioned sedimentary sources are either exhausted, stabilized or disconnected from active processes of sediment transfer, are likely to have the lowest rate of export. The conceptual model proposed in this paper fills a gap in the literature by developing a continuous pattern of sediment yield rate variability over the course of multiple glacial cycles, with wider implications for future research. However, its systematic applicability to various glacier settings and glaciations needs more field and modeling data to validate it.

在多个冰川周期的时间范围内（例如1×10 ² − 1×10 ^6），冰川的沉积物输出量随时间的变化年）是冰川学，沉积学，地貌学，气候学和环境工程领域广泛应用的兴趣所在。但是，冰川侵蚀产物通过冰川集水区转移所需的时间以及冰川条件沉积物在其中短暂存储的程度仍然受到限制，这在社区内部尚存争议。我们基于文献综述，提出了在多个冰川周期中冰川输出的沉积物变化的概念模型。在整个冰川周期中，沉积物的产量可能会发生很大变化，特别是在冰川前进，后退和再推进的各个阶段之间，这是由于冰速度和侵蚀速率，冰和融水的运输能力以及冰川条件下沉积物可及性的变化所致。床。通常，由于基岩侵蚀产物的获取和加工容易，预计冰川退缩和再推进的早期阶段将导致沉积物产量的最高增加。相反，一旦冰川条件的沉积源耗尽，冰川（晚期）推进的后期阶段可能会以通过基岩侵蚀维持的中等沉积物输出速率为特征。一旦冰川条件下的沉积源被耗尽，稳定或与活跃的沉积物转移过程脱钩，冰川作用的最新阶段很可能是最低的出口速度。本文提出的概念模型通过在多个冰川周期的过程中发展出连续的沉积物产率变化率模式，填补了文献中的空白，对未来的研究具有更广泛的意义。但是，其对各种冰川环境和冰川的系统适用性需要更多的现场数据和模型数据来对其进行验证。