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| Titel |
Relating climate change signals and physiographic catchment properties to clustered hydrological response types |
| VerfasserIn |
N. Köplin, B. Schädler, D. Viviroli, R. Weingartner |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 7 ; Nr. 16, no. 7 (2012-07-23), S.2267-2283 |
| Datensatznummer |
250013378
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| Publikation (Nr.) |
 copernicus.org/hess-16-2267-2012.pdf |
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| Zusammenfassung |
| We propose an approach to reduce a comprehensive set of 186 mesoscale
catchments in Switzerland to fewer response types to climate change and to name
sensitive regions as well as catchment characteristics that govern
hydrological change. We classified the hydrological responses of our study
catchments through an agglomerative-hierarchical cluster analysis, and we
related the dominant explanatory variables, i.e. the determining catchment
properties and climate change signals, to the catchments' hydrological
responses by means of redundancy analysis. All clusters except for one
exhibit clearly decreasing summer runoff and increasing winter runoff. This
seasonal shift was observed for the near future period (2025–2046) but is
particularly obvious in the far future period (2074–2095). Within a certain
elevation range (between 1000 and 2500 m a.s.l.), the hydrological change is
basically a function of elevation, because the latter governs the dominant
hydro-climatological processes associated with temperature, e.g. the ratio
of liquid to solid precipitation and snow melt processes. For catchments
below the stated range, hydrological change is mainly a function of
precipitation change, which is not as pronounced as the temperature signal
is. Future impact studies in Switzerland can be conducted on a reduced
sample of catchments representing the sensitive regions or covering a range
of altitudes. |
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