Accession Number : ADA319646

Title :   Relationships Between the Wind-Field, the Transport-Field and the Mean Mass-Field in a Non-Homogeneous Ocean,

Corporate Author : DEFENCE RESEARCH BOARD OTTAWA (ONTARIO)

Personal Author(s) : Shtokman, V. B.

PDF Url : ADA319646

Report Date : 1948

Pagination or Media Count : 9

Abstract : The classical theory of the horizontal circulation in a homogeneous ocean, as constructed by V. Ekman suffers from the defect that it considers only the frictional forces acting in horizontal planes. In consequence, once the water on the sea-bottom has acquired a motion, vertical velocity-gradients must be developed just as great as those in the surface layer of the sea. This result does not agree with observed data, which show that the vertical velocity-gradients in a non-homogeneous ocean are rapidly damped out with increasing depth, and at the bottom are to all practical intents and purposes insignificant. This rapid attenuation of the vertical velocity-gradients is a result of intensive horizontal exchange and transfer of motions, setting up, in vertical planes parallel to the horizontal components of flow, large frictional forces which almost entirely counter-balance the tangential stresses due to the wind on the surface of the ocean. Thus the distinctive feature of an established motion in a non-homogeneous ocean is the fact, confirmed by observation, that the frictional forces at the bottom are extremely small in comparison with the stresses set up by the turbulent 'side-friction'. On the basis of these findings, this report presents equations for the components of the steady-state transport in a non-homogeneous ocean.

Descriptors :   *MATHEMATICAL MODELS, *OCEAN CURRENTS, LAYERS, ENERGY TRANSFER, TRANSPORT PROPERTIES, MATHEMATICAL PREDICTION, VERTICAL ORIENTATION, RUSSIAN LANGUAGE, WIND SHEAR, ATTENUATION, HETEROGENEITY, RUSSIA, TRANSLATIONS, FRICTION, HOMOGENEITY.

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE