Abstract
In eddy-flux measurements of wind stress, heat exchange, and evaporation over the sea a knowledge of the instantaneous wind vector is essential. Dynamic anemometers measure wind velocity by sensing either pressure or drag force on an object placed in the flow. Three-axis thrust anemometers sense the wind thrust, or drag, on a spherical object. Pressure-sensing dynamic anemometers are seen to have similar characteristics. These anemometers, designed for measurements of turbulence and eddy fluxes, are normally mounted on stable platforms. Dynamic anemometers which measure horizontal wind speed and direction and require minimal maintenance may be suitable for general use on buoys, ships, etc., where rotating anemometers (see Busch, Chapter 1) are more often used. In many cases the anemometer is used to determine the wind stress on the sea surface,
where u’1 and u’3 are wind velocity fluctuations along the mean wind direction and in the vertical direction, respectively. Since the rms downwind and vertical fluctuations over the sea are typically 10% and 5%, respectively, of the mean wind speed, the anemometer must have good resolution and low noise in both wind speed and tilt angle, relative to these figures.
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References
COLTON, R.F. 1976. Vortex anemometers — second generation. Instrument Society of America Transactions, 15: 343–353.
DOE, L.A.E. 1963. A three component thrust anemometer for studies of vertical transports above the sea surface. Report 63–1, Bedford Institute of Oceanography, Dartmouth, N.S., Canada, 87 pp.
DOE, L.A.E. 1967. A series of three-component thrust anemometers. Proceedings of the First Canadian Conference on Micro-meteorology: 105–114. Atmospheric Environment Service, Downsview, Ont., Canada.
HOGSTROM, U. 1974. A critical examination of the turbulence instrument used in the Marsta micro-meteorological field project. Tellus, 26: 672–681.
HOPLEY, C.E. and M.J. TUNSTALL. 1971. A fast-response anemometer for measuring the turbulence characteristics of the natural wind. Journal of Physics E, Scientific Instruments, 4: 489–494.
KIRWAN, A.D., Jr., G.J. MCNALLY and E. MEHR. 1975. Response characteristics of a three-dimensional thrust anemometer. Boundary-Layer Meteorology, 8: 365–381.
LAFERTY, J.D. and L.V. SCHMIDT. 1969. Aerodynamic frequency response measurements of a wind anemometer. Journal of Spacecraft and Rockets, 6: 1080–1081.
MARTINOT-LAGARDE, A., A. FAUQUET and F.N. FRENKIEL. 1952. The IMFL Anemoclinometer — an instrument for the investigation of a fluctuating velocity vector. Review of Scientific Instruments, 23: 661–666.
MCBEAN, G.A. 1972. Instrument requirements for eddy correlation measurements. Journal of Applied Meteorology, 11: 1078–1084.
NORMAN, J.M., S.G. PERRY and H.A. PANOFSKY. 1976. Measurement and theory of horizontal coherence at a two-meter height. Reprints of Third Symposium on Atmospheric Turbulence, Diffusion, and Air Quality, Raleigh, N.C., U.S.A., October 19–22, 1976, American Meteorological Society: 26–31.
NORWOOD, M.H., A.E. CARIFFE and V.E. OLSZEWSKI. 1966. Drag force solid state anemometer and vane. Journal of Applied Meteorology, 5: 887–892.
OOST, W.A. 1974. A fast spray-proof anemometer. Report WR 74–5, Royal Netherlands Meteorological Institute, deBilt, Netherlands, 7 pp.
PERRY, S.G., J.M. NORMAN, H.A. PANOFSKY, and J.D. MARTSOLF. 1978. Horiziontal coherence decay near large mesoscale variations in topography. Journal of the Atmospheric Sciences, 35: 1884–1887.
PRANDTL, L. and O.G. TIETJENS. 1934. Applied Aero- and Hydro-Mechanics. Dover edition, New York, 1957, 311 pp.
SMITH, S.D. 1969. A sensor system for wind stress measurement. Report 1969–4, Bedford Institute of Oceanography, Dartmouth, N.S., Canada, 64 pp.
SMITH, S.D. 1970. Thrust-anemometer measurements of wind turbulence, Reynolds stress and drag coefficient over the sea. Journal of Geophysical Research, 75: 6758–6770.
SMITH, S.D. and E.G. BANKE. 1975. Variation of the sea surface drag coefficient with wind speed. Quarterly Journal of the Royal Meteorological Society, 101: 665–673.
TANNER, C.B. and G.W. THURTELL. 1970. Sensible heat flux measurements with a yaw sphere and thermometer. Boundary-Layer Meteorology, 1: 195–200.
THURTELL, G.W., C.B. TANNER and M.L. WESLEY. 1970. Three-dimensional pressure-sphere anemometer system. Journal of Applied Meteorology, 9: 379–385.
YAP, D. and T.R. OKE. 1974. Eddy correlation measurements of sensible heat flux over a grass surface. Boundary-Layer Meteorology, 7: 151–163.
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© 1980 Plenum Press, New York
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Smith, S.D. (1980). Dynamic Anemometers. In: Dobson, F., Hasse, L., Davis, R. (eds) Air-Sea Interaction. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9182-5_4
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DOI: https://doi.org/10.1007/978-1-4615-9182-5_4
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