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@ARTICLE{Ney:838684,
      author       = {Ney, Patrizia and Graf, Alexander},
      title        = {{H}igh-{R}esolution {V}ertical {P}rofile {M}easurements for
                      {C}arbon {D}ioxide and {W}ater {V}apour {C}oncentrations
                      {W}ithin and {A}bove {C}rop {C}anopies},
      journal      = {Boundary layer meteorology},
      volume       = {166},
      number       = {3},
      issn         = {0006-8314},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2017-07250},
      pages        = {449–473},
      year         = {2018},
      abstract     = {We present a portable elevator-based facility for measuring
                      CO2, water vapour, temperature and wind-speed profiles
                      between the soil surface and the atmospheric surface layer
                      above crop canopies. The end of a tube connected to a
                      closed-path gas analyzer is continuously moved up and down
                      over the profile range (in our case, approximately 2 m)
                      while concentrations are logged at a frequency of 20 s−1.
                      Using campaign measurements in winter wheat, winter barley
                      and a catch crop mixture (spring 2015 to autumn 2016) during
                      different stages of crop development and different times of
                      the day, we demonstrate a simple approach to correct for
                      time lags, and the resulting profiles of 30-min mean mole
                      fractions of CO2 and H2O over height increments of 0.025 m.
                      The profiles clearly show the effects of soil respiration
                      and photosynthetic carbon assimilation, varying both during
                      the diurnal cycle and during the growing season. Profiles of
                      temperature and wind speed are based on a ventilated
                      finewire thermocouple and a hot-wire anemometer,
                      respectively. Measurements over bare soil and a short plant
                      canopy were analyzed in the framework of Monin–Obukhov
                      similarity theory to check the validity of the measurements
                      and raw-data-processing approach. Derived fluxes of CO2,
                      latent and sensible heat and momentum show good agreement
                      with eddy-covariance measurements.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255) / IDAS-GHG - Instrumental and Data-driven
                      Approaches to Source-Partitioning of Greenhouse Gas Fluxes:
                      Comparison, Combination, Advancement (BMBF-01LN1313A)},
      pid          = {G:(DE-HGF)POF3-255 / G:(DE-Juel1)BMBF-01LN1313A},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000425958500005},
      doi          = {10.1007/s10546-017-0316-4},
      url          = {https://juser.fz-juelich.de/record/838684},
}