Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 370270
Title Experimental determination of turbulent fluxes over the heterogeneous LITFASS area: Selected results from the LITFASS-98 experiment
Author(s) Beyrich, F.; Richter, S.H.; Weisensee, U.; Kohsiek, W.; Lohse, H.; Bruin, H.A.R. de; Foken, T.; Gockede, M.; Berger, F.; Vogt, R.; Batchvarova, E.
Source Theoretical and Applied Climatology 73 (2002)39479. - ISSN 0177-798X - p. 19 - 34.
Department(s) Meteorology and Air Quality
Publication type Refereed Article in a scientific journal
Publication year 2002
Keyword(s) sensible heat - land-surface - structure parameter - natural conditions - momentum - scintillation - inhomogeneity - aircraft - exchange - forest
Abstract During the LITFASS-98 experiment, local flux measurements were performed over five different types of underlying surface (grass, barley, triticale, pine forest, water) in a heterogeneous landscape using eddy covariance and profile techniques over a three week time period in June, 1998. Estimates of the area-integrated sensible heat flux during daytime were obtained from continuous measurements with a large aperture scintillometer (LAS) along a 4.7¿km path. The calculation of a mean diurnal cycle of the fluxes during the experiment revealed significant differences between the main land use classes. A land-use weighted average of the sensible heat flux was found to be in good agreement with the LAS based estimate, which in turn was supported by other regionally integrated flux estimates from budget considerations and aircraft measurements for a few case studies. The profiles of turbulent quantities measured along a 99¿m-tower significantly deviate from ¿idealised¿ profiles measured over homogeneous terrain. Peculiarities in the profile structure could be attributed to the heterogeneity of the terrain, namely to the differences in the surface characteristics of the footprint areas for the different tower levels
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