Wind Speed, Stability and Eddy Viscosity over Melting Ice Surfaces

• Published in: Journal of Glaciology
• Main Authors: Grainger, M. E., Lister, H.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1966
• Subjects: Journal of Glaciology
• Online Access: http://dx.doi.org/10.1017/s0022143000019109; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000019109

Abstract The laws of wind-speed variation with height and their modification with stability are discussed and applied to observations in the first 2 m. over various cold surfaces. An exponential law is superior save in frequent, near-neutral conditions, but the logarithmic law is superior in neutral and again in really stable conditions. A power law and a logarithmic-plus-linear law give the best fit with the data only at moderate stabilities. A logarithmic-plus-cubic law of wind speed is evolved that permits suppression of linear additions to the logarithmic law at two distinct stabilities. A power form of variation of Richardson number with height is found and compared with a linear form. The former is applied with the logarithmicplus-cubic law to the observed data, though with limited success. Eddy-viscosity coefficients for the different laws are compared.