Abstract
The wind speed profile in a coastal marine environment is investigated with observations from the measurement program Rødsand, where meteorological data are collected with a 50 m high mast in the Danish Baltic Sea, about 11 km from the coast. When compared with the standard Monin—Obukhov theory the measured wind speed increase between 10 m and 50 m height is found to be systematically larger than predicted for stable and near-neutral conditions. The data indicate that the deviation is smaller for short (10–20 km) distances to the coast than for larger (>30 km) distances.
The theory of the planetary boundary layer with an inversion lid offers a qualitative explanation for these findings. When warm air is advected over colder water, a capping inversion typically develops. The air below is constantly cooled by the water and gradually develops into a well-mixed layer with near-neutral stratification. Typical examples as well as scatter plots of the data are consistent with this explanation. The deviation of measured and predicted wind speed profiles is shown to be correlated with the estimated height and strength of the inversion layer.
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Businger, J. A., Wyngaard, J. C., Izumi, Y., and Bradley, E. F.: 1971, ‘Flux-Profile Relationships in the Atmospheric Surface Layer’, J. Atmos. Sci. 28, 181–189.
Charnock, H.: 1955, ‘Wind Stress over a Water Surface’, Quart. J. Roy. Meteorol. Soc. 81, 639–640.
Csanady, G. T.: 1974, ‘Equilibrium Theory of the Planetary Boundary Layer with an Inversion Lid’, Boundary-Layer Meteorol. 6, 63–79.
Edson, J. B. and Fairall, C. W.: 1998, ‘Similarity Relationships in the Marine Atmospheric Surface Layer for Terms in the TKE and Scalar Variance Budgets’, J. Atmos. Sci. 55, 2311–2328.
Fairall, C. W., Bradley, E. F., Godfrey, J. S., Wick, G. A., Edson, J. B., and Young, G. S.: 1996, ‘Cool-Skin and Warm-Layer Effects on Sea Surface Temperature’, J. Geophys. Res. 101(C1), 1295–1308.
Garratt, J. R.: 1987, ‘The Stably Stratified Internal Boundary Layer for Steady and Diurnally Varying Offshore Flow’, Boundary-Layer Meteorol. 38, 169–394.
Garratt, J. R.: 1994, The Atmospheric Boundary Layer, Cambridge University Press, Cambridge, 316 pp.
Garratt, J. R. and Ryan B. F.: 1989, ‘The Structure of the Stably Stratified Internal Boundary Layer in Offshore Flow over the Sea’, Boundary-Layer Meteorol. 47, 17–40.
Geernaert, G. and Larsen, S.: 1993, ‘On the Role of Humidity in Estimating Marine Surface Layer Stratification and Scaterometer Cross Section’, J. Geophys. Res. 98(C1), 927–932.
Grachev, A. A. and Fairall C. W.: 1997, ‘Dependence of the Monin-Obukhov Stability Parameter on the Bulk Richardson Number over the Ocean’, J. Appl. Meteorol. 36, 406–414.
Högström, U.: 1988, ‘Nondimensional Wind and Temperature Profiles’, Boundary-Layer Meteorol. 42, 55–78.
Højstrup, J.: 1999, ‘Vertical Extrapolation of Offshore Wind Profiles’, in E. L. Petersen, P. Hjuler Jensen, K. Rave, P. Helm, and H. Ehmann (eds.), Wind Energy for the Next Millennium. Proceedings. 1999 European Wind Energy Conference (EWEC '99), Nice, FR, March 1-5, 1999, James and James Science Publishers, London, U.K., pp. 1220–1223.
Johnson, H. K., Højstrup, J., Vested, H. J., and Larsen S. E.: 1998, ‘On the Dependence of Sea Surface Roughness on Wind Waves’, J. Phys. Oceanogr. 28, 1702–1716.
Källstrand, B.: 1998, ‘Low Level Jets in a Marine Boundary Layer during Spring’, Contr. Atmos. Phys. 71, 359–373.
Kristensen, L.: 1998, ‘Cup Anemometer Behaviour in Turbulent Environments’, J. Atmos. Oceanic Tech. 15, 5–17.
Lange, B., Barthelmie, R. J., and Højstrup, J.: 2001, Description of the Rødsand Field Measurement, Report Risø-R-1268, Risø National Laboratory, 4000 Roskilde, DK, 60 pp.
Lange, B., Johnson, H.K., Larsen, S., Højstrup, J., Kofoed-Hansen, H., and Yelland, M. J.: 2004, ‘On Detection of a Wave Age Dependency for the Sea Surface Roughness’, J. Phys. Oceanog., in press.
Larsen, S. E.: 1993, ‘Observing and Modelling the Planetary Boundary Layer’, in E. Raschke and D. Jacob (eds.), Energy and Water Cycles in the Climate System, NATO ASI series I, Volume 5, Springer-Verlag, Berlin, Heidelberg, pp. 365–418.
Lenschow D. H., Li X. S., Zhu C. J., and Stankov, B. B.: 1988, ‘The Stably Stratified Boundary Layer over the Great Plains, I, Mean and Turbulence Structure’, Boundary-Layer Meteorol. 42, 95–121.
Melas, D.: 1989, ‘The Temperature Structure in a Stably Stratified Internal Boundary Layer over a Cold Sea’, Boundary-Layer Meteorol. 48, 361–375.
Mortensen, N. G., Landberg L., Troen, I., and Petersen, E. L.: 1993, Wind Analysis and Application Program (WASP)-User's Guide, Report Risø-I-666(EN) (v.2), Risø National Laboratory, 4000 Roskilde, Denmark, 133 pp.
Panofsky, H. A.: 1973, ‘Tower Micrometeorology’, in D. A. Haugen (ed.), Workshop on Micrometeorology, American Meteorological Society, Boston, 151–176.
Schotanus, P., Nieuwstadt, F. T. M., and De Bruin, H. A.: 1983, ‘Temperature Measurement with a Sonic Anemometer and its Application to Heat and Moisture Fluxes’, Boundary-Layer Meteorol. 26, 81–93.
Smedman, A.-S., Bergström, H., and Grisogono, B.: 1997, ‘Evolution of Stable Internal Boundary Layers over a Cold Sea’, J. Geophys. Res. 102(C1), 1091–1099.
Tennekes, H.: 1982, ‘Similarity Relations, Scaling Laws and Spectral Dynamics’, in F. T. M. Nieuwstadt and H. van Dop (eds.), Atmospheric Turbulence and Air Pollution Modelling, Reidel, Hingham, MA, pp. 37–68.
Tjernström, M., and Smedman, A.-S.: 1993, ‘The Vertical Turbulence Structure of the Coastal Marine Atmospheric Boundary Layer’, J. Geophys. Res. 98(C3), 4809–4826.
Wu, J.: 1980, ‘Wind Stress Coefficients over Sea Surface near Neutral Conditions-A Revisit’, J. Phys. Oceanogr. 10, 727–740.
Wyngaard, J. C.: 1973, ‘On Surface-Layer Turbulence’, in D. A. Haugen (ed.), Workshop on Micrometeorology, American Meteorological Society, Boston, pp. 101–149.
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Lange, B., Larsen, S., Højstrup, J. et al. The Influence of Thermal Effects on the Wind Speed Profile of the Coastal Marine Boundary Layer. Boundary-Layer Meteorology 112, 587–617 (2004). https://doi.org/10.1023/B:BOUN.0000030652.20894.83
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DOI: https://doi.org/10.1023/B:BOUN.0000030652.20894.83