An Optimum Model with a Small Number of Variables for Multilevel Forecasting of the Geopotential Field,
Abstract
Many of the methods presently used for operational numerical weather forecasting cannot be used on more than a few levels. The difficulties in forecasting the fields of meteorological factors for a large number of levels are given and a two-parameter model is proposed for forecasting the geopotential fields. This model is based on optimum conventionalization, i.e. on a system which assures the best statistical accuracy in approximating the vertical profiles of the meteorological elements. Equations are derived which should be satisfied by the optimum function system. The author considered the statistical stability of optimum functions and found that those for daily changes in the geopotential are stable regardless of latitude or season, which applies as well to the optimum functions of the vertical profiles for the meridian and regional wind velocity components and those of daily geopotential changes are similar. The optimum functions were calculated for 20 days selected from the beginning of January, the middle of April, the beginning of July and the end of Octobe. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 09, 1970
- Accession Number
- AD0719805
Entities
People
- L. V. Rukhovets
Organizations
- National Air and Space Intelligence Center