THE DETERMINATION OF RICHARDSON NUMBER AND ROUGHNESS PARAMETER AT OCEAN VESSEL VICTOR.
Abstract
Research on wind and temperature profiles over land have established a number of fundamental relationships that are tested here over an oceanic location. Most attempts at calculating the roughness parameter over oceanic surfaces have been based on surface-layer theories, and often employ an iterative procedure in approaching the sea surface. A similarity relationship between the wind and temperature profiles is employed, using data at ship 'Victor' appropriate to forced convective theory, as defined by Priestley. The theory of forced convection, as applied here, makes it necessary to compute the Richardson number and the MoninObukhov scale length as preliminaries to the computation of roughness parameter. The roughness parameter and friction velocity are obtained from the theory using an iterative procedure. The wind speed at 20 meters is correlated against scale length and roughness parameter. The latter makes very little contribution to the variance of the windspeed while the scale length contributes in a manner reasonably expected from theory. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0616530
Entities
People
- Larry M. Riley
Organizations
- Naval Postgraduate School