Scintillometer-Based Turbulent Fluxes of Sensible and Latent Heat Over a Heterogeneous Land Surface – A Contribution to Litfass-2003 |
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| Authors: | W M L Meijninger F Beyrich A Lüdi W Kohsiek H A R De Bruin |
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| Institution: | (1) Meteorology and Air Quality Group, Wageningen University and Research Centre, Duivendaal 2, 6701 AP Wageningen, The Netherlands;(2) Meteorological Observatory Lindenberg, German Meteorological Service (DWD), Am Observatorium 12, 15848 Tauche – OT Lindenberg, Germany;(3) Institute of Applied Physics, University of Bern, Sidlerstr. 5, 3012 Bern, Switzerland;(4) Royal Netherlands Meteorological Institute (KNMI), P.O. Box 201, 3730 AE De Bilt, The Netherlands |
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| Abstract: | The performance of a combined large aperture scintillometer (LAS) and a millimetre wave scintillometer (MWS) for estimating surface fluxes of sensible and latent heat over natural landscape is investigated, using data gathered during LITFASS-2003. For this purpose the LAS–MWS system was installed in a moderate heterogeneous landscape over a path length of 4.7 km with an effective beam height of 43 m. The derived surface fluxes have been compared with aggregated eddy-covariance (EC) measurements. The fluxes of sensible and latent heat from the LAS–MWS combination, as well as sensible heat fluxes of the single LAS, agreed fairly well with the EC-based fluxes, considering the uncertainties of the similarity stability functions and observed energy imbalance. |
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| Keywords: | Area-averaged surface fluxes Evaporation Heterogeneous area Large aperture scintillometer LITFASS-2003 Millimetre wave scintillometer Scintillometer |
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