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On the relationship of radar backscatter to wind speed and fetch

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Abstract

The physics of the interaction of electromagnetic waves with the ocean surface has been an active area of research for a number of years. We present here the results of satellite and aircraft experiments to investigate the ability of active microwave radars to infer surface wind speeds remotely. Data obtained from the recent National Aeronautics and Space Administration (NASA) Skylab experiment are compared with surface wind speeds measured by low-flying aircraft and ships-of-opportunity and found to give useful estimates of the oceanic wind field. We also investigate the influence of varying wave height on radar measurements of wind speed by measuring the backscattering cross-section for constant wind speed but variable wave conditions. We conclude that this effect is of little importance.

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References

  • Banner, M. L. and Phillips, O. M.: 1974, ‘On Small Scale Breaking Waves’,J. Fluid Mech. 65, 647–657.

    Google Scholar 

  • Bass, F. G., Fuks, I. M., Kalmykov, A. I., Ostrovsky, I. E., and Rosenberg, A. D.: 1968, ‘Very High Frequency Radiowave Scattering by a Disturbed Sea Surface’,IEEE Trans. on Antennas and Propagation AP-16, No. 5, 554–568.

    Google Scholar 

  • Cardone, V. J.: 1969, ‘Specification of the Wind Distribution in the Marine Boundary Layer for Wave Forecasting’, New York Univ. Technical Report TR-69-1, Bronx, New York.

  • Cardone, V. J., Young, J. D., Pierson, W. J., Moore, R. K., Greenwood, J. A., Greenwood, C., Fung, A., Salfi, R., Chan, H., Afarani, M., and Komen, M.: 1976, ‘The Measurement of Winds Near the Ocean Surface with a Radiometer-Scatterometer on Skylab’, Final Report on EPN550, Cont. No. NAS-9-13642, City Univ. of New York, 324 pp.

  • CRC Standard Mathematical Tables, 16th Edition, 1968, 533.

  • Duncan, J. W., Keller, W. C., and Wright, J. W.: 1974, ‘Fetch and Windspeed Dependence of Doppler Spectra’,Radio Sci. 9, 809–819.

    Google Scholar 

  • Guinard, N. W. and Daley, J. C.: 1970, ‘An Experimental Study of a Sea Clutter Model’,Proc. IEEE 58, 543–550.

    Google Scholar 

  • Hasselmann, K., Barnett, T. P., Bouws, E., Carlson, H., Cartwright, D. E., Enke, K., Ewing, J. A., Gienappe, H., Hasselmann, D. E., Kruseman, P., Meerburg, A., Mueller, P., Olbers, Richter, K., Sell, W., and Walden, H.: 1973, ‘Measurements of Wind-Wave Growth and Swell Decay During the Joint North Sea Wave Project (JONSWAP)’,Deut. Hydrogr. Z., Suppl. A,8, 95 pp.

  • Hasselmann, K., Ross, D. B., Muller, P., and Sell, W.: 1976 ‘A Parametrical Wave Prediction Model’,J. Phys. Oceanogr. 6, 200–228.

    Google Scholar 

  • Jones, W. L., Schroeder, L. C., and Mitchell, J. L.: 1977, ‘Aircraft Measurements of the Microwave Scattering of the Ocean’,IEEE Trans. on Antennas and Propagation, Special Issue on Radio OceanographyAP-25, No. 1, 22 pp.

  • Keller, W. C. and Wright, J. W.: 1976, ‘Modulation of Microwave Backscatter by Gravity Waves in a Wave Tank’, Naval Research Laboratory, Report 7968, Washington, D.C., 21 pp.

  • Kitaigorodskii, S. A.: 1961, ‘Applications of the Theory of Similarity to the Analysis of Wind-Generated Wave Motion as a Stochastic Process’,Izv. Akad. Nauk. Oceanogr. 1, 249–257.

    Google Scholar 

  • Krishen, K.: 1971, ‘Correlation of Radar Backscattering Cross Section with Ocean Wave Height and Wind Velocity’,J. Geophys. Res. 76, 6528–6539.

    Google Scholar 

  • Liu, P. C.: 1971, ‘Normalized and Equilibrium Spectra of Wind Waves in Lake Michigan’,J. Phys. Oceanogr. 1, 249–257.

    Google Scholar 

  • Long, M. W.: 1975,Radar Reflectivity of Land and Sea, Lexington Books, 366 pp.

  • Moore, R. K., Classen, J. P., Cook, A. C., Fayman, D. L., Holtzman, J. C., Sobti, A., Spencer, W. E., Ulaby, F. T., Young, J. D., Pierson, W. J., Cardone, V. J., Hayes, J., Spring, W., Kern, R. J., and Hatcher, N. M.: 1974, ‘Simultaneous Active and Passive Microwave Response to the Earth — The Skylab RADSCAT Experiment’,Ninth International Symposium on Remote Sensing of Environment, Anne Arbor, Michigan.

  • Phillips, O. M.: 1958, ‘The Equilibrium Range in the Spectrum of Wind-generated Waves’,J. Fluid Mech. 4, 426–434.

    Google Scholar 

  • Phillips, O. M.: 1966,The dynamics of the Upper Ocean, The University Press, Cambridge, England.

    Google Scholar 

  • Pierson, W. J., Cardone, V. J., and Greenwood, J. A.: 1974, ‘The Applications of SEASAT-A to Meteorology’, prepared for SPOC Group of NOAA under Grant No. 04-4-158-11, Univ. Inst. of Oceanography, City Univ. of New York.

  • Ramamonjiarisoa, A.: 1974, Contribution à l'étude de la structure statistique et des mécanismes de génération des vagues de vent, Ph.D. Thesis, à l'Université de Provence, Institut de Mécanique Statistique de la Turbulence, Luminy, France, 160 pp.

    Google Scholar 

  • Richards, T. L., Dragert, H., and McIntyre, D. R.: 1966, ‘Influence of Atmospheric Stability and Overwater Fetch on Winds over the Lower Great Lakes’,Mon. Weather Rev. 94, 454–458.

    Google Scholar 

  • Ross, D., Au, B., Brown, W., and McFadden, J.: 1974, ‘A Remote Sensing Study of Pacific Hurricane AVA’,Proc. of the Remote Sensing Symposium, Willow Run Laboratories, Ann Arbor, Mich., 15–20 April.

    Google Scholar 

  • Ross, D.: 1975, ‘A Comparison of SKYLAB S-193 and Aircraft Views of Surface Roughness and Look Toward SEASAT’,Proc. of the NASA Earth Resources Symposium, Houston, Texas, 9–13 June.

  • Rouse, J. W. and Moore, R. K.: 1972, ‘Measured Surface Spectrum Dependence of Backscattering from Rough Surface’,IEEE Trans, on Antennas and Propagation AP-20, 211–214.

    Google Scholar 

  • Toba, Y.: 1974, ‘Macroscopic Principles on the Growth of Wind Waves’,Sci. Rep. Tohoku Univ., Ser. 5,Geophysics 22, 61–73.

    Google Scholar 

  • Valenzuela, G. R.: 1968, ‘Scattering of Electromagnetic Waves from a Tilted Slightly Rough Surface’,Radio Sci. 3, 1057–1066.

    Google Scholar 

  • Valenzuela, G. R., Laing, M. B., and Daley, J. C.: 1971, ‘Ocean Spectra for the High Frequency Waves as Determined from Airborne Radar Measurements’,J. Mar. Res. 29, 69–84.

    Google Scholar 

  • Wright, J. W.: 1968, ‘A New Model for Sea Clutter’,IEEE Trans. on Antennas and Propagation AP-16, 217–223.

    Google Scholar 

  • Wright, J. W., and Keller, W. C.: 1971, ‘Doppler Spectra in Microwave Scattering from Wind Waves’,Phys. Fluids 14, 466.

    Google Scholar 

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Ross, D., Jones, W.L. On the relationship of radar backscatter to wind speed and fetch. Boundary-Layer Meteorol 13, 151–163 (1978). https://doi.org/10.1007/BF00913868

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