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Increasing non-linearity of the storage-discharge relationship insub-Arcticcatchments

Hinzman, Alexa M. and Sjoeberg, Ylva and Lyon, Steve W. and Ploum, Stefan and van der Velde, Ype (2020). Increasing non-linearity of the storage-discharge relationship insub-Arcticcatchments. Hydrological Processes. 34 , 3894-3909
[Research article]

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Abstract

The Arctic is warming at an unprecedented rate. We hypothesis that as seasonally frozen soils thaw and recede in extent as a response to this warming, flow path diversity and thus hydrologic connectivity increases. This enhanced hydrologic connectivity then increases the non-linearity of the storage-discharge relationship in a catchment. The objective of this study is to test this hypothesis by quantifying trends and spatio-temporal differences in the degree of linearity in the storage-discharge relationships for 16 catchments within Northern Sweden from 1950 to 2018. We demonstrate a clear increase in non-linearity of the storage-discharge relationship over time for all catchments with 75% showing a statistically significant increase in non-linearity. Spring has significantly more linear storage-discharge relationships than summer for most catchments (75%) supporting the idea that seasonally frozen soils with a low degree of hydrological connectivity have a linear storage-discharge relationship. For the period considered, spring also showed greater change in storage-discharge relationship trends than summer signifying that changes in recessions are primarily occurring during the thawing period. Separate storage-discharge analyses combined with preceding winter conditions demonstrated that especially cold winters with little snow yielded springs and summers with more linear storage-discharge relationships. We show that streamflow recession analysis reflects ongoing hydrological change of an arctic landscape as well as offering new metrics for tracking change across arctic and sub-arctic landscapes.

Authors/Creators:Hinzman, Alexa M. and Sjoeberg, Ylva and Lyon, Steve W. and Ploum, Stefan and van der Velde, Ype
Title:Increasing non-linearity of the storage-discharge relationship insub-Arcticcatchments
Series Name/Journal:Hydrological Processes
Year of publishing :2020
Volume:34
Page range:3894-3909
Number of Pages:16
Publisher:WILEY
ISSN:0885-6087
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Climate Research
Keywords:arctic hydrology, recession analysis, seasonally frozen soil, storage-discharge, thaw
URN:NBN:urn:nbn:se:slu:epsilon-p-107045
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107045
Additional ID:
Type of IDID
DOI10.1002/hyp.13860
Web of Science (WoS)000549819700001
ID Code:22647
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:23 Feb 2021 15:46
Metadata Last Modified:01 Mar 2021 02:48

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