An Unfiltered Primitive-Equation Model of the Upper Layers of the Pacific Ocean.

by R. C. Alexander

Purchase Print Copy

 FormatList Price Price
Add to Cart Paperback84 pages $25.00 $20.00 20% Web Discount

A resumption of work begun by Crowley to construct a model of stratified ocean circulations based on the unfiltered (or free-surface) primitive equations of motion. Solutions for temperature and velocity are sought to an initial value problem using an explicit, leapfrog, numerical scheme. This introduces the problem of initialization of unfiltered primitive equations for oceanic predictions, which represents a novel feature of the present study. Representative results from initialization and a 15-day prediction using climatological January initial and boundary data are presented. Specification of geostrophic and nondivergent initial data for prescribed temperature, followed by spin-up after the method of Sarkisyan, is found adequate to initialize the model without introducing unrealistic gravity-inertial oscillations. Use of a fixed value of bottom friction is effective in damping transients generated by the initial data. Spin-up is achieved in less than 90 simulated days, after which thermal imbalances generally exist. 84 pp. Ref.

This report is part of the RAND Corporation Paper series. The paper was a product of the RAND Corporation from 1948 to 2003 that captured speeches, memorials, and derivative research, usually prepared on authors' own time and meant to be the scholarly or scientific contribution of individual authors to their professional fields. Papers were less formal than reports and did not require rigorous peer review.

Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.