Using stable isotopes to assess surface water source dynamics and hydrological connectivity in a high-latitude wetland and permafrost influenced landscape
Using stable isotopes to assess surface water source dynamics and hydrological connectivity in a high-latitude wetland and permafrost influenced landscape
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DOI：
10.1016/j.jhydrol.2017.11.024
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发表时间：
2018-01-01
影响因子：
6.4
通讯作者：
Tetzlaff, D.
中科院分区：
文献类型：
--
作者：
Ala-aho, P.;Soulsby, C.;Tetzlaff, D.
气候变化预计会改变高纬度内陆水域的水文和生物地球化学过程。了解当前和未来对环境变化的反应的一个关键问题是径流生成过程的时空动态将如何受到影响。我们在西西伯利亚低地沿着1700公里的样带，在前所未有的时空尺度上对土壤、湖泊和河流中的稳定水同位素进行了采样。我们的研究结果表明，融雪与储存在有机土壤和湖泊中的大量水混合并取代，在解冻季节产生径流。此外，我们还看到了永久冻土区水体和景观之间持久的水文联系。我们的发现有助于在高纬度系统的小尺度和大尺度水文研究之间架起理解的桥梁。这些同位素数据提供了一种方法来概念化冻土和湿地影响地区的水文连通性，这对于更好地了解未来的生物地球化学变化是必要的。(C) 2017年作者。Elsevier B.V.出版
Climate change is expected to alter hydrological and biogeochemical processes in high-latitude inland waters. A critical question for understanding contemporary and future responses to environmental change is how the spatio-temporal dynamics of runoff generation processes will be affected. We sampled stable water isotopes in soils, lakes and rivers on an unprecedented spatio-temporal scale along a 1700 km transect over three years in the Western Siberia Lowlands. Our findings suggest that snowmelt mixes with, and displaces, large volumes of water stored in the organic soils and lakes to generate runoff during the thaw season. Furthermore, we saw a persistent hydrological connection between water bodies and the landscape across permafrost regions. Our findings help to bridge the understanding between small and large scale hydrological studies in high-latitude systems. These isotope data provide a means to conceptualise hydrological connectivity in permafrost and wetland influenced regions, which is needed for an improved understanding of future biogeochemical changes. (C) 2017 The Authors. Published by Elsevier B.V.