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A comparison of turbulence statistics in the surface layer over plant canopies with those over several other surfaces

โœ Scribed by T. Maitani

Publisher
Springer
Year
1979
Tongue
English
Weight
496 KB
Volume
17
Category
Article
ISSN
0006-8314

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โœฆ Synopsis

Turbulence statistics, including higher order moments, in the surface layer over plant canopies were compared with those observed over several different surfaces, using a nondimensional height (zd)/z(,. The values of (zd)/z,, extend over a very wide range from 10" over plant canopies to 10' over the ocean. Several properties such as intensities of turbulence and skewness factors show a remarkable height-dependency in the air layer below (zd)/z,, = 10'. which is supposed to be much influenced by the underlying surface. In that layer, some peculiar phenomena, such as a downward energy transport and positive flux of shear stress, are frequently observed.

๐Ÿ“œ SIMILAR VOLUMES

Statistics of wind direction fluctuation
Statistics of wind direction fluctuations in the surface layer over plant canopies
โœ T. Maitani ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Springer ๐ŸŒ English โš– 468 KB

Height dependency of statistics of horizontal and vertical wind direction fluctuations over plant canopies have been studied, using observational data in the surface layer over paddy fields. Vertical wind directions just above plant canopies have significant positive average values and large standar

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Observations of wind velocity and temperature fluctuations were made in the nocturnal surface inversion layer over a paddy field. A remarkable wave-like motion of about 8 min period was seen in horizontal wind speed and standard deviation ofvertical wind velocity. In addition, fluctuations ofhorizon

Estimates of velocity-pressure and veloc
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โœ T. Maitani; T. Seo ๐Ÿ“‚ Article ๐Ÿ“… 1985 ๐Ÿ› Springer ๐ŸŒ English โš– 503 KB

The budget equations of turbulent kinetic energy and shear stress contain interaction terms of velocity-pressure and velocity-pressure gradient. These terms were estimated in the surface layer using the air pressure observed at the surface and wind velocity components over plant canopies. The magnit