Articles | Volume 24, issue 1
https://doi.org/10.5194/hess-24-17-2020
https://doi.org/10.5194/hess-24-17-2020
Research article
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06 Jan 2020
Research article | Highlight paper |  | 06 Jan 2020

Seasonal partitioning of precipitation between streamflow and evapotranspiration, inferred from end-member splitting analysis

James W. Kirchner and Scott T. Allen

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Cited articles

Ali, G., Tetzlaff, D., Mcdonnell, J. J., Soulsby, C., Carey, S., Laudon, H., McGuire, K., Buttle, J., Seibert, J., and Shanley, J.: Comparison of threshold hydrologic response across northern catchments, Hydrol. Process., 29, 3575–3591, https://doi.org/10.1002/hyp.10527, 2015. 
Allen, S. T., Keim, R. F., Barnard, H. R., McDonnell, J. J., and Brooks, J. R.: The role of stable isotopes in understanding rainfall interception processes: A review, WIREs Water, 4, 1–17, https://doi.org/10.1002/wat2.1187, 2017. 
Allen, S. T., Kirchner, J. W., Braun, S., Siegwolf, R. T. W., and Goldsmith, G. R.: Seasonal origins of soil water used by trees, Hydrol. Earth Syst. Sci., 23, 1199–1210, https://doi.org/10.5194/hess-23-1199-2019, 2019a. 
Allen, S. T., von Freyberg, J., Weiler, M., Goldsmith, G. R., and Kirchner, J. W.: The seasonal origins of streamwater in Switzerland, Geophys. Res. Lett., 46, 10425–10434, https://doi.org/10.1029/2019GL084552, 2019b. 
Bailey, A. S., Hornbeck, J. W., Campbell, J. L., and Eagar, C.: Hydrometerological database for Hubbard Brook Experimental Forest, 1955–2000, U.S. Forest Service General Technical Report NE-305, Newtown Square, PA, 2003. 
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Short summary
Perhaps the oldest question in hydrology is Where does water go when it rains?. Here we present a new way to measure how the terrestrial water cycle partitions precipitation into its two ultimate fates: green water that is evaporated or transpired back to the atmosphere and blue water that is discharged to stream channels. Our analysis may help in gauging the vulnerability of both water resources and terrestrial ecosystems to changes in rainfall patterns.