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@INPROCEEDINGS{Graf:1033844,
      author       = {Graf, Alexander and Marcon, Lediane and Schmidt, Marius and
                      Kubistin, Dagmar and Lindauer, Matthias and
                      Müller-Williams, Jennifer and Ney, Patrizia and
                      Klosterhalfen, Anne and Brümmer, Christian and Vila, Jordi
                      and Peichl, Matthias and Vereecken, Harry},
      title        = {{L}ooking beyond our {E}ddy-{C}ovariance backyard –
                      vertical profiles at ecosystem stations},
      reportid     = {FZJ-2024-06685},
      year         = {2024},
      abstract     = {The well-equipped eddy-covariance (EC) stations of the ICOS
                      ecosystem network are ideal testbeds for tentatively
                      measuring or estimating additional variables relevant to
                      monitoring or modelling global change. A common limitation
                      of a standard EC station is the confinement of most
                      variables to the EC measurement height, which is typically
                      limited by factors such as footprint size, the need to avoid
                      the roughness sublayer, and tower construction costs. Few
                      (mostly forest) stations provide some measurements below
                      this height, and almost none offer measurements above it.
                      Here, we present past and ongoing efforts to close these
                      gaps.For scalars and wind below the EC height, we developed
                      a profiling system, that mitigates calibration issues and
                      sensor costs by moving sensors and tubes within crop
                      canopies and their roughness sublayer. The original system
                      for CO2, H2O, wind and temperature, which moves up and down
                      continuously at one location, is currently being replaced by
                      a robot-arm based system to enhance flexibility in movement
                      speed and horizontal measurement locations.For scalars above
                      the EC height, we demonstrated in previous research that the
                      potential temperature of the well-mixed part of the
                      convective planetary boundary layer can be estimated from
                      turbulence data measured by the EC equipment. We present
                      first steps to extend this approach to CO2. Ultimately, we
                      aim at testing the feasibility of this and other ‘virtual
                      tall tower’ concepts for infrastructures such as ICOS. In
                      case of a positive evaluation, spatial data density could be
                      dramatically increased helping to verify atmospheric inverse
                      modelling estimates.},
      month         = {Sep},
      date          = {2024-09-10},
      organization  = {ICOS Science conference 2024,
                       Versailles (France), 10 Sep 2024 - 12
                       Sep 2024},
      subtyp        = {After Call},
      cin          = {IBG-3},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217) / IDAS-GHG - Weiterentwicklung und Vergleich von
                      Methoden zur instrumentellen und analytischen
                      Komponentenzerlegung gemessener Treibhausgasflüsse
                      (01LN1313A)},
      pid          = {G:(DE-HGF)POF4-2173 / G:(BMBF)01LN1313A},
      typ          = {PUB:(DE-HGF)24},
      doi          = {10.34734/FZJ-2024-06685},
      url          = {https://juser.fz-juelich.de/record/1033844},
}