Representation of Topography in Spectral Models,
Abstract
Various ways of representing topography that is a part of a global spectral model have been examined using the notions of error-in-synthesis and error-in-reproduction in measuring accuracy and fidelity. The trapezoidal and Gauss-Legendre quadratures are employed in conjuction with different truncations in the numerical computation of the transformations. The results have led to the following conclusions: (1) The model terrain is best defined by the set of spectral coefficients in a truncation range tahat is commensurate with the model resolution; (2) The model terrain in the real domain should be defined on the Gaussian latitudes as the transform of the spectral coefficients using the Gauss-Legendre quadrature; (3) Smoothing by aspectral truncation alone is not suffiecient to insure the accuracy either in synthesis or in reproduction. Originator-supplied keyword: Global circulation model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 23, 1985
- Accession Number
- ADA159917
Entities
People
- Henry Yang
Organizations
- Air Force Research Laboratory