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Aerodynamic parameter changes above a young spruce forest stand during five growing seasons
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SYSNO ASEP 0027142 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Aerodynamic parameter changes above a young spruce forest stand during five growing seasons Title Změny aerodynamických parametrů nad mladým smrkovým porostem v průběhu pěti vegetačních sezón Author(s) Hurtalová, T. (SK)
Matejka, F. (SK)
Rožnovský, J. (CZ)
Marková, Irena (UEK-B)
Janouš, Dalibor (UEK-B) RID, SAISource Title Contributions to Geophysics & Geodesy - ISSN 1335-2806
Roč. 34, č. 2 (2004), s. 131-146Number of pages 16 s. Language eng - English Country SK - Slovakia Keywords aerodynamic parameters ; roughness length ; young spruce stand Subject RIV DG - Athmosphere Sciences, Meteorology R&D Projects GA526/00/0485 GA ČR - Czech Science Foundation (CSF) Annotation The results of vertical profile measurements of the wind speed have been evaluated with flow and aerodynamic characteristics(Bílý Kříž).The experimental site consisting of two plots Fd and Fs is created by the monoculture of young Norway sprucestand with density of 2600 trees per ha in Fd plot and 2400 trees per ha in Fs plot.The mean seasonal values of the zero plane displacement d in Fd plot increased during the investigated period from 5.3 m to 7.1 m and the mean seasonal values of the dynamic roughness length zo ranged between 4.48 m to 0.61 m.The corresponding values in Fs plot varied within this period in the intervals 4.2 m-6.2 m and 0.41 m-0.69 m, respectively.It was shown, that the local terrain influenced the power of the airflow and vertical wind speed profiles in fd and Fs plots.The dependence between the friction velocity u* and the wind speed u(h),measured at the mean height of the forest (h),indicated that the investigated young spruce foreststand was in an aerodyna Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2006
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