A comparison of turbulence statistics in the surface layer over plant canopies with those over several other surfaces |
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| Authors: | T Maitani |
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| Institution: | (1) Institute for Agricultural and Biological Sciences, Okayama University, Kurashiki, Japan |
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| Abstract: | 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 (z – d)/z
0: The values of (z – d)/z
0extend over a very wide range from 10 over plant canopies to 107 over the ocean. Several properties such as intensities of turbulence and skewness factors show a remarkable height-dependency in the air layer below (z – d)/z
0 = 102, 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. |
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