When timing matters-considering changing temporal structures in runoff response surfaces

Klaus Vormoor (), Ole Rössler, Gerd Bürger, Axel Bronstert and Rolf Weingartner
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Klaus Vormoor: University of Potsdam
Ole Rössler: University of Bern
Gerd Bürger: University of Potsdam
Axel Bronstert: University of Potsdam
Rolf Weingartner: University of Bern

Climatic Change, 2017, vol. 142, issue 1, No 16, 213-226

Abstract: Abstract Scenario-neutral response surfaces illustrate the sensitivity of a simulated natural system, represented by a specific impact variable, to systematic perturbations of climatic parameters. This type of approach has recently been developed as an alternative to top-down approaches for the assessment of climate change impacts. A major limitation of this approach is the underrepresentation of changes in the temporal structure of the climate input data (i.e., the seasonal and day-to-day variability) since this is not altered by the perturbation. This paper presents a framework that aims to examine this limitation by perturbing both observed and projected climate data time series for a future period, which both serve as input into a hydrological model (the HBV model). The resulting multiple response surfaces are compared at a common domain, the standardized runoff response surface (SRRS). We apply this approach in a case study catchment in Norway to (i) analyze possible changes in mean and extreme runoff and (ii) quantify the influence of changes in the temporal structure represented by 17 different climate input sets using linear mixed-effect models. Results suggest that climate change induced increases in mean and peak flow runoff and only small changes in low flow. They further suggest that the effect of the different temporal structures of the climate input data considerably affects low flows and floods (at least 21% influence), while it is negligible for mean runoff.

Keywords: Response Surface; Regional Climate Model; Temporal Structure; Climate Projection; Quantile Mapping (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (1)

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DOI: 10.1007/s10584-017-1940-1

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