Articles | Volume 24, issue 11
https://doi.org/10.5194/hess-24-5095-2020
https://doi.org/10.5194/hess-24-5095-2020
Research article
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05 Nov 2020
Research article | Highlight paper |  | 05 Nov 2020

The pulse of a montane ecosystem: coupling between daily cycles in solar flux, snowmelt, transpiration, groundwater, and streamflow at Sagehen Creek and Independence Creek, Sierra Nevada, USA

James W. Kirchner, Sarah E. Godsey, Madeline Solomon, Randall Osterhuber, Joseph R. McConnell, and Daniele Penna

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Cited articles

Allen-Diaz, B. H.: Water table and plant species relationships in Sierra Nevada meadows, Am. Midl. Nat., 126, 30–43, https://doi.org/10.2307/2426147, 1991. 
Bailey, R. G., Avers, P. E., King, T., and McNab, W. H.: Ecoregions and subregions of the United States with supplementary table of map unit descriptions, U.S. Department of Agriculture, Forest Service, Washington, D.C., 1994. 
Barnard, H. R., Graham, C. B., Van Verseveld, W. J., Brooks, J. R., Bond, B. J., and McDonnell, J. J.: Mechanistic assessment of hillslope transpiration controls of diel subsurface flow: a steady-state irrigation approach, Ecohydrology, 3, 133–142, https://doi.org/10.1002/eco.114, 2010. 
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Bishop, K. H.: Episodic increases in stream acidity, catchment flow pathways and hydrograph separation, PhD dissertation, Department of Geography, University of Cambridge, Cambridge, 1991. 
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Short summary
Streams and groundwaters often show daily cycles in response to snowmelt and evapotranspiration. These typically have a roughly 6 h time lag, which is often interpreted as a travel-time lag. Here we show that it is instead primarily a phase lag that arises because aquifers integrate their inputs over time. We further show how these cycles shift seasonally, mirroring the springtime retreat of snow cover to higher elevations and the seasonal advance and retreat of photosynthetic activity.