%0 Journal Article
%T Local Similarity Relationships of Non-Dimensional Wind and Temperature Gradient in the Tower-Layer Atmosphere over Beijing City
%A Al-Jiboori M H
%A Xu Yumao
%A Qian Yongfu
%A <br>Al-Jiboori M. H.
%A Xu Yumao
%A Qian Yongfu
%J 大气科学进展
%D 2000
%I 
%X Micrometeorological data for wind and temperature from a 325 m high tower in Beijing City are analyzed by use of local similarity theory. Non-dimensional wind and temperature gradients, Фm and Фh, are determined by three techniques called, respectively, eddy-correlation, mean profiles and inertia-subrange cospectra (ISC) method for a wide range of atmospheric stratification from unstable to stable conditions. Average dissipation rate Фε of turbulent kinetic energy (TKE) is evaluated from u-spectrum, as a quantity required in the last technique. Ratio of the eddy transfer coefficients. α (= Kh / Km,), is calculated from Фm and Фh estimations. The results from various techniques are compared with each other and with some available empirical results in the tower-layer. It is shown that the empirical relationships determined by mean profiles and ISC methods in the tower-layer turbulence are in agreement with each other and with some other results.
%K Local similarity
%K Non-dimensional gradients of wind and temperature
%K Dissipation rate
%K Ratio of eddy diffusivities
%K Spectra and Cospectra<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=5434AFBF6CB6E7E8D67733B541F211C7&aid=0DA63876895B284F9F1BA071FEC247C5&yid=9806D0D4EAA9BED3&vid=BCA2697F357F2001&iid=E158A972A605785F&sid=9BF3B0483F192149&eid=421C41B8FD4D3EBA&journal_id=0256-1530&journal_name=大气科学进展&referenced_num=0&reference_num=0