Determination of the Constants for a Second-Order Closure Turbulence Model from Geophysical Data

摘要

Values of four parameterization constants for the bulk, second-order closure turbulence model of Garwood (1976) are determined using ocean data from the North Pacific experiment (NORPAX) Trans-Pacific ship of opportunity program (TRANSPAC) and atmospheric forcing from the Fleet Numerical Oceanography Center (FNOC) model. The annual cycle of sea surface temperature is simulated for each of the years 1976-1978. The difference between the simulated and the analyzed monthly change of sea surface temperature is minimized to determine the optimal values of the model constants. Three statistical techniques are used to determine the sensitivity of the model to changes of the model constants. Two techniques, bootstrapping and pooled permutation procedure, yield similar conclusions. The third, a standard students's t-test, proved to be overly sensitive. The formulation for the absorption of solar radiation with depth, in the Garwood model, is a simplification of a two exponent model.