Arctic slope hydrology studies suggest that water follows preferential subsurface flow paths known as water tracks. While subsurface flow is usually expected to transport only dissolved solids, periglacial studies have indicated some evidence of lessivage associated with flow through sorted patterned ground. We investigated the transport of dissolved and suspended sediments in water tracks on a polar desert slope, and linked this transport to slope and flow path geomorphology. Solute transfer was dominated by carbonate weathering products, and concentrations of other ions increased disproportionately when the active layer thawed. Suspended sediment transport occurred in water tracks, but fluxes were supply‐limited, indicating competent subsurface mechanical erosion. Solute mass fluxes were 5–10 times greater than sediment fluxes. In this dry landscape dominated by snowmelt, surface seepage leads to sediment deposition, while subsurface flow promotes lessivage. A conceptual model of nivation slopes is presented, taking into consideration the influence of flow path morphology and adaptation of the hydrological system to localized water sources from wind‐drifted snowbanks. Climate‐driven permafrost degradation and the increased frequency of rainfall events may result in new sediment sources and changes in flow pathways, modifying the physico‐chemical properties and ecology of downstream receiving waters.

中文翻译：

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沿高北极边坡的溶质迁移和地下侵蚀主导的沿冰缘边坡冲刷

北极斜坡水文学研究表明，水遵循优先的地下流动路径，即水迹。虽然通常预期地下流只能输送溶解的固体，但沿冰川的研究表明，一些证据表明流经分类的有图案的地面的流动性降低。我们研究了极地沙漠坡面水迹中溶解和悬浮的沉积物的运移，并将这种运移与坡度和流径地貌联系起来。碳酸盐风化产物主导溶质的转移，而活性层解冻时其他离子的浓度却成比例地增加。悬浮的泥沙运移发生在水道中，但通量受到供应的限制，表明地下机械侵蚀作用较强。溶质的通量是泥沙通量的5-10倍。在以融雪为主的干旱地区，地表渗水导致沉积物沉积，而地下流动促进了疏iv。考虑到流径形态的影响以及水文系统对风吹积雪的局部水源的适应性，提出了一个小坡度的概念模型。由气候驱动的多年冻土退化和降雨事件的频率增加可能导致新的沉积物来源和流动路径的变化，从而改变了下游接收水的理化特性和生态。考虑了流路形态的影响以及水文系统对风吹积雪的局部水源的适应性。由气候驱动的多年冻土退化和降雨事件的频率增加可能导致新的沉积物来源和流动路径的变化，从而改变了下游接收水的理化特性和生态。考虑了流路形态的影响以及水文系统对风吹积雪的局部水源的适应性。由气候驱动的多年冻土退化和降雨事件的频率增加可能导致新的沉积物来源和流动路径的变化，从而改变了下游接收水的理化特性和生态。