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@ARTICLE{Rothfuss:903045,
      author       = {Rothfuss, Youri and Quade, Maria and Brüggemann, Nicolas
                      and Graf, Alexander and Vereecken, Harry and Dubbert, Maren},
      title        = {{R}eviews and syntheses: {G}aining insights into
                      evapotranspiration partitioning with novel isotopic
                      monitoring methods},
      journal      = {Biogeosciences},
      volume       = {18},
      number       = {12},
      issn         = {1726-4170},
      address      = {Katlenburg-Lindau [u.a.]},
      publisher    = {Copernicus},
      reportid     = {FZJ-2021-04774},
      pages        = {3701 - 3732},
      year         = {2021},
      abstract     = {Disentangling ecosystem evapotranspiration (ET) into
                      evaporation (E) and transpiration (T) is of high relevance
                      for a wide range of applications, from land surface
                      modelling to policymaking. Identifying and analysing the
                      determinants of the ratio of T to ET (T/ET) for various land
                      covers and uses, especially in view of climate change with
                      an increased frequency of extreme events (e.g. heatwaves and
                      floods), is prerequisite for forecasting the hydroclimate of
                      the future and tackling present issues, such as agricultural
                      and irrigation practices.One partitioning method consists of
                      determining the water stable isotopic compositions of ET, E,
                      and T (δET, δE, and δE, respectively) from the water
                      retrieved from the atmosphere, the soil, and the plant
                      vascular tissues. The present work emphasizes the challenges
                      this particular method faces (e.g. the spatial and temporal
                      representativeness of the T/ETestimates, the limitations of
                      the models used, and the sensitivities to their driving
                      parameters) and the progress that needs to be made in light
                      of the recent methodological developments. As our review is
                      intended for a broader audience beyond the isotopic
                      ecohydrological and micrometeorological communities, it also
                      attempts to provide a thorough review of the ensemble of
                      techniques used for determining δET, δE, and δE and
                      solving the partitioning equation for T/ET.From the current
                      state of research, we conclude that the most promising way
                      forward to ET partitioning and capturing the subdaily
                      dynamics of T/ETis by making use of non-destructive online
                      monitoring techniques of the stable isotopic composition of
                      soil and xylem water. Effort should continue towards the
                      application of the eddy covariance technique for
                      high-frequency determination of δET at the field scale as
                      well as the concomitant determination of δET, δE, and δE
                      at high vertical resolution with field-deployable lift
                      systems.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000665535800001},
      doi          = {10.5194/bg-18-3701-2021},
      url          = {https://juser.fz-juelich.de/record/903045},
}