Results from One-Year Continuous Operation of a Large Aperture Scintillometer over a Heterogeneous Land Surface

A large-aperture scintillometer (LAS) was operated continuouslyduring a period of more than one year over a heterogeneous land surface in Central Europeat the transition between marine and continental climates. The LAS measurements of the refractiveindex structure parameter, C^sub N^^sup 2^, were us...

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Bibliographic Details
Published in:Boundary-layer meteorology 2002-10, Vol.105 (1), p.85-97
Main Authors: Beyrich, F., De Bruin, H. A. R., Meijninger, W. M. L., Schipper, J. W., Lohse, H.
Format: Article
Language:English
Subjects:
Brackish
Cold season
Fluctuations
Freshwater
Land use
Marine
Meteorologie en Luchtkwaliteit
Meteorology
Meteorology and Air Quality
Prediction models
Sensible heat
Weather forecasting
WIMEK
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Summary:A large-aperture scintillometer (LAS) was operated continuouslyduring a period of more than one year over a heterogeneous land surface in Central Europeat the transition between marine and continental climates. The LAS measurements of the refractiveindex structure parameter, C^sub N^^sup 2^, were used to estimate the sensible heat flux. Thiswas possible for about 60to 80% of the time under daytime conditions during thesummer, with lower values obtained for the cold season (October to March). Using datafrom a three-week long field experiment, the LAS-based heat flux was compared with a weighedaverage of local heat flux measurements over the main land use classes (forest, agriculture,water) in the area, resulting in reasonable agreement. LAS-based heat fluxes were then used forcomparison with the heat flux values of a numerical weather prediction model. An over-predictionof the model heat flux was found in summer but the modelled values were lower than the LASderived data during the cold season.[PUBLICATION ABSTRACT]
ISSN:0006-8314
1573-1472
DOI:10.1023/A:1019640014027