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Volume 15 Issue 6, June 2016



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  • REVIEW AND ANALYSIS up

    • Michelle A. Walvoord and Barret L. Kurylyk
      Hydrologic Impacts of Thawing Permafrost—A Review
      Core Ideas
      • This review synthesizes the state of the science in permafrost hydrology.
      • Observed and projected hydrologic impacts of permafrost thaw are discussed.
      • Characterization, modeling, and knowledge gaps of permafrost systems are identified.
      • Translating results between multiple scales in cold regions presents a challenge.
      • Opportunities for advancement in the field of permafrost hydrology are described.
      doi:10.2136/vzj2016.01.0010
      Vadose Zone Journal 2016 15:
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  • ORIGINAL RESEARCH up

    • Felix Greifeneder, Claudia Notarnicola, Giacomo Bertoldi, Georg Niedrist and Wolfgang Wagner
      From Point to Pixel Scale: An Upscaling Approach for In Situ Soil Moisture Measurements
      Core Ideas
      • Soil moisture can be remotely sensed with active radar.
      • A new method allows spatial upscaling of in situ and remotely sensed data.
      • A machine learning based method is used for soil moisture retrieval.
      doi:10.2136/vzj2015.03.0048
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    • Mark Seyfried, Timothy Link, Danny Marks and Mark Murdock
      Soil Temperature Variability in Complex Terrain Measured Using Fiber-Optic Distributed Temperature Sensing
      Core Ideas
      • Soil temperature variability within land surface units is low, with a SD of <1.5°C.
      • Land surface effects are greater than a 911-m elevation change.
      • Fiber-optic DTS provides a unique look at soil temperature variability.
      doi:10.2136/vzj2015.09.0128
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    • Maxim Poltoradnev, Joachim Ingwersen and Thilo Streck
      Spatial and Temporal Variability of Soil Water Content in Two Regions of Southwest Germany during a Three-Year Observation Period
      Core Ideas
      • A set of all possible states of spatial soil water content variability in relation to the mean spatial soil water content is a contingent phase space.
      • The left and the right outermost points of the phase space and its lower bound are determined by the variability of soil physical properties.
      • Generation or dissipation of soil water content variability depends on its momentary location in relation to these points and the phase space bounds.
      • Soil water content temporal dynamics can be divided onto sequential wetting-drying periods.
      • At the event-scale spatial soil water content variability moves along the hysteretic loop, triggered by rainstorms with spatially highly variable intensities.
      doi:10.2136/vzj2015.11.0143
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      [ Supplement 1 ] [ Supplement 2 ] [ Supplement 3 ] [ Supplement 4 ] [ Supplement 5 ] [ Supplement 6 ]
    • Clemens J.M. Cremer, Insa Neuweiler, Michel Bechtold and Jan Vanderborght
      Solute Transport in Heterogeneous Soil with Time-Dependent Boundary Conditions
      Core Ideas
      • Impact of dynamic boundary conditions on solute transport in heterogeneous materials
      • Identification of transport mechanisms by conductivity function and boundary flux
      • Predictions using one-dimensional effective transport models with constant flux
      doi:10.2136/vzj2015.11.0144
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    • Samuel Falzone and Kristina Keating
      The NMR Relaxation Response of Unconsolidated Sediments during Drainage and Imbibition
      Core Ideas
      • NMR relaxation rates are a function of water content but do not exhibit hysteresis.
      • NMR sum of echoes does not exhibit hysteresis with imbibition and drainage.
      • The results are consistent across the synthetic sands and natural soils investigated.
      • Results suggest NMR can characterize the WRC but not distinguish drainage from imbibition.
      doi:10.2136/vzj2015.11.0153
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