2020
DOI: 10.5194/hess-24-4317-2020
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Climate elasticity of evapotranspiration shifts the water balance of Mediterranean climates during multi-year droughts

Abstract: Abstract. Multi-year droughts in Mediterranean climates may shift the water balance, that is, the partitioning rule of precipitation across runoff, evapotranspiration, and sub-surface storage. Mechanisms causing these shifts remain largely unknown and are not well represented in hydrologic models. Focusing on measurements from the headwaters of California's Feather River, we found that also in these mixed rain–snow Mediterranean basins a lower fraction of precipitation was partitioned to runoff during multi-ye… Show more

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Cited by 56 publications
(99 citation statements)
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“…The shifts in the partitioning of available water can be related to feedback mechanisms between climatic conditions and catchment characteristics that either exacerbate or mitigate drought (Bales et al, 2018;Teuling et al, 2013;Avanzi et al, 2020). (In this study, "exacerbation" and "mitigation" are used with respect runoff).…”
Section: Identifying Mechanisms Of Water Balance Shiftsmentioning
confidence: 99%
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“…The shifts in the partitioning of available water can be related to feedback mechanisms between climatic conditions and catchment characteristics that either exacerbate or mitigate drought (Bales et al, 2018;Teuling et al, 2013;Avanzi et al, 2020). (In this study, "exacerbation" and "mitigation" are used with respect runoff).…”
Section: Identifying Mechanisms Of Water Balance Shiftsmentioning
confidence: 99%
“…We examined four basin characteristics and responses to drought that may relate to observed shifts in the precipitation-runoff relationship. These are mechanisms that have previously been associated with drought-induced shifts in the water balance: 1) amount of available water storage (Avanzi et al, 2020;Rungee et al, 2019;Oroza et al, 2018;Hahm et al, 2019a); 2) timing of water availability, which is related to precipitation phase (Avanzi et al, 2020;Rungee et al, 2019;Berghuijs et al, 2014); 3) catchment aridity, which has been correlated with sensitivity to interannual changes in precipitation and departures from the historic mean precipitation (Berghuijs et al, 2014;Saft et al, 2016;Tian et al, 2020); and 4) high-elevation runoff, related to basin spatial heterogeneity that can serve to mitigate drought (Bales et al, 2018). Since not all of these mechanisms are directly measured across the Sierra, we use proxies to estimate their effects.…”
Section: Identifying Mechanisms Of Water Balance Shiftsmentioning
confidence: 99%
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