Improvements to the Staniforth-Mitchell barotropic numerical weather prediction code
By: R.E. Newton
Contributors: Naval Postgraduate School (U.S.). Dept. of Mechanical Engineering
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1986
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 22
Subjects: SUBROUTINES; WEATHER FORECASTING
Other titles: NPS-69-86-008.
Description: Improvements to the Staniforth-Mitchell barotropic numerical weather prediction code are proposed. Three separate contributions are described: (1) a direct solution of the Helmholtz equation is offered as a substitute for the iterative scheme currently employed; (2) a new algorithm is developed to solve the generalized eigenvalue problem for symmetric tridiagonal matrices; (3) the latter algorithm is extended to deal with a periodic boundary condition. It is estimated that a direct solution of the Helmholtz equation, for a 13 X 13 grid, will effect a computation time saving per time step of at least 10 percent. FORTRAN 77 listings of the subroutines needed to implement the proposed improvements are included
Notes: Title from cover.

"NPS-69-86-008."

"October 1986."

"Interim report for period June 1986 - September 1986."

AD A173 568.

Includes bibliographical references (p. 7).

aq/aq cc:9116 04/19/99.