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Approximate Solutions For The Obukhov Length And The Surface Fluxes In Terms Of Bulk Richardson Numbers

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Abstract

Simple analytic approximate solutions arepresented for the set of equations that follows fromthe Monin–Obukhov flux-profile relationships using thestability functions of Dyer (unstable case) andBeljaars–Holtslag (stable case). Several publicationsare devoted to the same subject, however the currentapproach contains some new features, namely: (a) itappears to be more accurate for unstable situationsand (b) it applies also to the general case where windspeed (u) and potential temperature(θ) are given at different levels. In order toillustrate the accuracy of the approach a comparisonwith the actual solutions is presented for someselected combinations of θ and u levelstypical for various practical applications.

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Authors and Affiliations

  1. Wageningen Agricultural University, Duivendaal 2, 6701 AP, Wageningen, The Netherlands

    H. A. R. De Bruin, R. J. Ronda & B. J. H. Van De Wiel

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  1. H. A. R. De Bruin
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  2. R. J. Ronda
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  3. B. J. H. Van De Wiel
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De Bruin, H.A.R., Ronda, R.J. & Van De Wiel, B.J.H. Approximate Solutions For The Obukhov Length And The Surface Fluxes In Terms Of Bulk Richardson Numbers. Boundary-Layer Meteorology 95, 145–157 (2000). https://doi.org/10.1023/A:1002671628167

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