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Hydro-climatic and lake change patterns in Arctic permafrost and non-permafrost areas

机译:北极多年冻土区和非多年冻土区的水文气候和湖泊变化规律

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This paper investigates patterns of lake-area and hydro-climatic change in Arctic river basins, and possible influence of permafrost change reflected in such patterns. A salient change pattern, emerging across all investigated basins in both permafrost and non-permafrost areas, is an opposite change direction in runoff (R) from that in precipitation (P). To explain this change contrast, an increase (decrease) in relative water-balance constrained evapotranspiration ETwb/P is required where R decreases (increases). Increasing temporal variability of daily river discharge (sdQ) is found in all basins with spatially extensive lake decrease, which also exhibit decrease in ELwb/P. Clear indication of basin-wide permafrost thaw is found in only one basin, and is possible in two more, but unlikely in the largest of the total four investigated permafrost basins. (C) 2015 The Authors. Published by Elsevier B.V.
机译:本文研究了北极流域的湖泊面积和水文气候变化的模式,以及这种模式反映的多年冻土变化的可能影响。在多年冻土区和非多年冻土区所有调查盆地中都出现的显着变化模式是径流(R)的变化方向与降水(P)的变化方向相反。为了解释这种变化的对比,在R减小(增加)的情况下,需要相对水平衡约束的蒸散量ETwb / P的增加(减少)。在所有流域内湖泊减少的盆地中,日河流流量(sdQ)的时间变化性都增加了,ELwb / P也呈现出下降的趋势。仅在一个盆地中发现了整个盆地的多年冻土融化的清晰迹象,在另外两个盆地中也有可能,但在四个被调查的多年冻土盆地中最大的一个中不可能。 (C)2015作者。由Elsevier B.V.发布

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