Derivation of the aerodynamic roughness parameters for a Sahelian savannah site using the eddy correlation technique

    Lloyd, C R and Gash, J H C and Sivakumar, M V K (1992) Derivation of the aerodynamic roughness parameters for a Sahelian savannah site using the eddy correlation technique. Boundary-Layer Meteorology, 58 (3). pp. 261-271. ISSN 1573-1472

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    Abstract

    Vertical exchange of heat, moisture and momentum above the earth's surface depends strongly on the turbulence generated by surface roughness. This roughness is best specified through the roughness length and the zero plane displacement. The ratio of windspeed to friction velocity was measured at four heights using the eddy correlation technique at a fallow savannah site in the Sahel. The change in this ratio with height was used to derive the zero plane displacement and the roughness length of the surface, together with an estimate of the error in each parameter. These were estimated as 0.93 ± 0.35 m and 0.17 ± 0.01 m, respectively. The method appears to be a more robust alternative to wind profile derivation.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Others > Climate Change
    Depositing User: Mr Charan Sai Ch
    Date Deposited: 20 Oct 2011 13:14
    Last Modified: 14 Sep 2013 12:16
    URI: http://oar.icrisat.org/id/eprint/3056
    Official URL: http://dx.doi.org/10.1007/BF02033827
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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