Structure parameters for temperature and humidity from simultaneous eddy-covariance and scintillometer measurements

F. Beyrich, R. Kouznetsov, J.P. Leps, A. Lüdi, W.M.L. Meijninger, U. Weisensee

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25 Citations (Scopus)

Abstract

Line-averaged values of the structure parameters of temperature and humidity, CT2 and Cq2, were estimated from simultaneous measurements with an optical and a microwave scintillometer over a path of 4.7 km length at the Meteorological Observatory Lindenberg during the LITFASS-2003 experiment. By cross-correlating the detected signals of the two scintillometers, the temperature-humidity structure parameter, CTq, and the temperature-humidity correlation, rTq, were also derived directly from the measurements. Comparison with corresponding values obtained from local measurements with an eddy-covariance system on a meteorological tower show a consistent behaviour in time (with some exceptions especially for Cq2 and rTq during nighttime). The deviations are of a magnitude between 20 % and 35 % of the typical daytime values of the structure parameters.
Original languageEnglish
Pages (from-to)641-649
JournalMeteorologische Zeitschrift
Volume14
Issue number5
DOIs
Publication statusPublished - 2005

Keywords

  • large-aperture scintillometer
  • flevoland field experiment
  • refractive-index
  • surface-layer
  • heterogeneous surface
  • land-surface
  • fluxes
  • scintillation
  • heat
  • turbulence

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