Accession Number:

ADA305883

Title:

Application of an Inverse Model in the Community Modeling Effort Results.

Descriptive Note:

Doctoral thesis,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s):

Report Date:

1995-02-01

Pagination or Media Count:

266.0

Abstract:

An inverse model IM consisting of approximate thermal wind balance and steady state conservation laws for mass, heat, and salt was examined in 1 a non-eddy resolving GCM ocean, 2 the 5-year time means of an eddy-resolving GCM EGCM ocean with a fine grid resolution, and 3 the spatially smoothed time means of the EGCM ocean with a coarse grid resolution. Assumptions of the IM were approximately satisfied by 1, 2, and 3, but residuals in conservation equations were comarable to eddy diffusion terms in deep ocean. IM estimates for horizontal circulation were robust - they were consistent with the circulation in 1, the time-mean circulation in 2, and the spatially smoothed time-mean circulation in 3 most of the time. Effects of the data noise were more easily seen on solutions for eddy diffusion coefficients. Discrepancies between conclusions of this work and previous studies were explained. Data noise in the coarse grid resolution was partially caused by subsampling. This aliasing was greatly reduced by spatial smoothing. IM solutions were sensitive to vertical level numbers while insensitive to horizontal domain size. Properly representing the vertical profiles of hydrographic data was essential in getting the correct answers. AN

Subject Categories:

  • Physical and Dynamic Oceanography
  • Operations Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE