Accession Number : ADP008741

Title :   Estimation of Free Parameters by Inverse Modeling,

Corporate Author : ALFRED WEGENER INST FOR POLAR AND MARINE RESEARCH BREMERHAVEN (GERMANY)

Personal Author(s) : Schroter, Jens

Report Date : NOV 1993

Pagination or Media Count : 27

Abstract : An objective procedure is presented which allows the systematic determination of free model parameters in numerical models. A nonlinear inverse technique is applied to fit the model to observations. Optimal values for the free parameters are found in a systematic way be minimizing the least squares distance between modeled and observed data. The method is applied to a general circulation model (GCM) of the Atlantic Ocean. The GCM includes an embedded mixed layer model based on the equation of turbulent kinetic energy. A number of free parameters describe, e.g., the efficiency of wind stirring, decay scales of turbulence, and so forth. They are determined by fitting the annual cycle of the modeled mixed layer depth to climatological data. The parameter values and their error covariance matrix are computed.

Descriptors :   *MATHEMATICAL MODELS, *OCEAN CURRENTS, *NUMERICAL ANALYSIS, ATLANTIC OCEAN, TURBULENCE, DATA PROCESSING, KINETIC ENERGY, MIXED LAYER(MARINE), LEAST SQUARES METHOD, GERMANY.

Subject Categories : Operations Research
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE