RESEARCH IN NUMERICAL ANALYSIS AND FORECASTING.
Abstract
Observational data have been used in studies of friction and frictional dissipation in the atmosphere. Data from aerological stations in southern U.S. during suitable weather conditions were used for vertical integration in the equa tions of motion in order to determine stresses in the lowest two kilometers of the atmosphere. Data from the dense radio-wind network over the British Isles were used in order to study the frictional dissipation within a limited area and to determine characteristic values for the cross isobaric angle, for the ratio of the wind at aneomometer level and geostrophic surface wind, for the geostrophic drag coefficient and for the eddy viscocity in their dependence of surface roughness. On the assumption that zonal averages of third order perturbation quantities can be neglected, it is shown that one can derive a complete set of equations for prediction in barotropic flow. It is shown that a considerable simplification can be obtained if one considers a quasi linearized system, which with regard to the statistical quantities is equivalent to the first system. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1963
- Accession Number
- AD0413058
Entities
Organizations
- Stockholm University