Geostrophic departure and the functions A and B of Rossby-number similarity theory
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
A new empirical assessment of the functions A and B of Rossby-number similarity theory is made based on the Wangara data. Variations of these functions with stability, baroclinicity and time of day are discussed. It is found that B is dependent on stability in agreement with older data but contradicting the prediction of Csanady (1972). Coefficients expressing the variation of A and B with the two components of baroclinicity have been derived from the data, and these are claimed to be correct in regard to sign and approximately in regard to magnitude. Longer period time changes, represented by the diurnal cycle, are shown to result in systematic differences in A and B between the case of increasing stability and that of decreasing stability, for the same value of the stability parameter.
The first attempt, to our knowledge, to present the actual functional form of the wind departure components (based on field data) is made. As the surface layer is approached in near-neutral conditions, the departure component in the direction of the surface wind assumes the expected logarithmic form.
- Arya, S. P. S.: 1974, ‘Geostrophic Drag and Heat Transfer Relations for the Atmospheric Boundary Layer’, to be published.
- Blackadar, A. K.: 1965, ‘A Single Layer Theory of the Vertical Distribution of Wind in a Baroclinic Neutral Atmospheric Boundary Layer’, in Flux of Heat and Momentum in the Planetary Boundary Layer of the Atmosphere', Final report, pp. 1–22, Penn. State Univ., Meteorology Dept., Contract AFCRL-65-531.
- Bradley, E. F. (1972) The Influence of Thermal Stability on a Drag Coefficient Measured Close to the Ground. Agric. Meteorol. 9: pp. 183-190
- Clarke, R. H. (1970) Observational Studies in the Atmospheric Boundary Layer. Quart. J. Roy. Meteorol. Soc. 96: pp. 91-114
- Clarke, R. H. (1970) Recommended Methods for the Treatment of the Boundary Layer in Numerical Models. Australian Meteorol. Mag. 18: pp. 51-73
- Clarke, R. H. (1972) Discussion of “Observational Studies in the Atmospheric Boundary Layer”. Quart. J. Roy. Meteorol. Soc. 98: pp. 234-235
- Clarke, R. H. (1973) Note on the Variability of Empirical Determinations of the Functions A(Μ) and B(Μ) of Rossby-Number Similarity Theory. Beiträge Phys. Atmos. 46: pp. 64-65
- Clarke, R. H., Hess, G. D. (1973) On the Appropriate Scaling for Velocity and Temperature in the Planetary Boundary Layer. J. Atmospheric Sci. 30: pp. 1346-1353
- Clarke, R. H., Dyer, A. J., Brook, R. R., Reid, D. G., and Troup, A. J.: 1971, ‘The Wangara Experiment: Boundary Layer Data‘, Technical Paper No. 19, CSIRO, Div. Meteorol. Phys. 362 pp.
- Csanady, G. T. (1972) Geostrophic Drag, Heat and Mass Transfer Coefficients for the Diabatic Ekman Layer. J. Atmospheric Sci. 29: pp. 488-496
- Csanady, G. T. (1973) Reply to Comments on “Geostrophic Drag, Heat and Mass Transfer Coefficients for the Diabatic Ekman Layer”. J. Atmospheric Sci. 30: pp. 155-156
- Deacon, E. L. (1957) Wind Profiles and Shearing Stress — an Anomaly Resolved. Quart. J. Roy. Meteorol. Soc. 83: pp. 537-540
- Deacon, E. L. (1973) Geostrophic Drag Coefficients. Boundary-Layer Meteorol. 5: pp. 321-340
- Deardorff, J. W. (1972) Numerical Investigation of Neutral and Unstable Planetary Boundary Layers. J. Atmospheric Sci. 29: pp. 91-115
- Fiedler, F. (1972) The Effect of Baroclinicity on the Resistance Law in a Diabatic Ekman Layer. Beiträge Phys. Atmos. 45: pp. 164-173
- Gill, A. E. (1968) Similarity Theory and Geostrophic Adjustment. Quart. J. Roy. Meteorol. Soc. 94: pp. 586-588
- Hess, G. D. (1973) On Rossby-Number Similarity Theory for a Baroclinic Planetary Boundary Layer. J. Atmospheric Sci. 30: pp. 1722-1723
- Kazansky, A. B., Monin, A. S. (1960) A Turbulent Regime Above the Ground Atmospheric Layer. Izv Acad. Sci. U.S.S.R. Geophys. Ser. 1: pp. 110-112
- Swinbank, W. C. and Dyer, A. J.: 1968, ‘Micrometeorological Experiments 1962–1964’, Technical Paper No. 17, CSIRO, Div. Meteorol. Phys. 48 pp.
- Vager, B. G., Zilitinkevich, S. S. (1968) A Theoretical Model of the Daily Oscillation of Meteorological Fields. Meteorol. Hydrol. U.S.S.R. 7: pp. 3-18
- Webb, E. K. (1970) Profile Relationships: the Log-Linear Range, and Extension to Strong Stability. Quart. J. Roy. Meteorol. Soc. 96: pp. 67-90
- Wippermann, F. (1972) Baroclinic Effects on the Resistance Law of the Planetary Boundary Layer of the Atmosphere. Beiträge Phys. Atmos. 45: pp. 244-259
- Zilitinkevich, S. S., Chalikov, D. V. (1968) The Laws of Resistance and of Heat and Moisture Exchange in the Interaction Between the Atmosphere and Underlying Surface. Izv. Atmospheric Oceanic Phys. 4: pp. 438-441
- Geostrophic departure and the functions A and B of Rossby-number similarity theory
Volume 7, Issue 3 , pp 267-287
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- Industry Sectors