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Southern Sierra Critical Zone Observatory and Kings River Experimental Watersheds: a synthesis of measurements, new insights, and future directionsAuthor(s): Anthony (Toby) O’Geen; Mohammad Safeeq; Joseph Wagenbrenner; Erin Stacy; Peter Hartsough; Scott Devine; Zhiyaun Tian; Ryan Ferrell; Mike Goulden; Jan W. Hopmans; Roger Bales
Source: Vadose Zone Journal. 17(1): 180081
Publication Series: Scientific Journal (JRNL)
Station: Pacific Southwest Research Station
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DescriptionSensor networks within the Southern Sierra Critical Zone Observatory (SSCZO) and Kings River Experimental Watersheds (KREW) document changes in the water cycle spanning the west slope of the southern Sierra Nevada in California. The networks were established to document water dynamics throughout the critical zone spanning profile, hillslope, catchment, and watershed scales at key locations that reflect systematic differences in bioclimatic conditions imposed by a strong elevation gradient. The critical zone observatory attempts to constrain the hydrologic budget via representative measurements of streamflow, eddy flux covariance, snow depth, meteorological conditions, and water content and water potential in soil and deep regolith. These measurements reveal the complexity of interactions among all aspects of the water balance (runoff, storage, evapotranspiration [ET], and precipitation) through daily, seasonal, and annual timescales. Multiyear drought, catastrophic wildfires, insect outbreaks, and disease have caused widespread tree mortality in the Sierra Nevada. These disturbances offer a window into the future for this region, which is expected to undergo significant change in response to global warming. This hydrological observatory provides valuable hydrometric attributes and fluxes across the stream–groundwater–vadose zone–soil–vegetation–atmosphere continuum.
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CitationO’Geen, Anthony (Toby); Safeeq, Mohammad; Wagenbrenner, Joseph; Stacy, Erin; Hartsough, Peter; Devine, Scott; Tian, Zhiyaun; Ferrell, Ryan; Goulden, Mike; Hopmans, Jan W.; Bales, Roger. 2018. Southern Sierra Critical Zone Observatory and Kings River Experimental Watersheds: a synthesis of measurements, new insights, and future directions. Vadose Zone Journal. 17(1): 180081. https://doi.org/10.2136/vzj2018.04.0081.
KeywordsHydrologogical observatory, KREW, SSCZO
- Spatially distributed water-balance and meteorological data from the rain–snow transition, southern Sierra Nevada, California
- Signatures of hydrologic function across the Critical Zone Observatory network
- Cosmogenic isotopes unravel the hydrochronology and water storage dynamics of the Southern Sierra Critical Zone
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