Accession Number : ADA182578

Title :   Sea-State Engineering Analysis System (SEAS). Revision.

Descriptive Note : 1ST Edition,

Corporate Author : COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS

Personal Author(s) : McAneny,Danielle S

PDF Url : ADA182578

Report Date : Nov 1986

Pagination or Media Count : 199

Abstract : A description is provided for the Sea-State Engineering Analysis System (SEAS) which is a computer-based system designed to provide direct access to wave hindcast data produced by the Wave Information Study. This first revised edition describes new SEAS system capabilities and additional data sets which are now available. New revised editions/supplements will be issued as other new data sets or capabilities are added to SEAS. There are four basic steps in the calculation of waves from past meteorological data. First, pressure data must be assimilated into a pressure field that depicts all important synoptic weather features. Gradients of pressure in time and space, along with certain thermal characteristics of the planetary boundary layer, are then used to construct an estimate of a quasi-geostrophic wind speed and direction at some level where it is assumed that the frictional effects of the ocean surface on the atmosphere are negligible. Next, an analysis of the vertical variation of the wind in the planetary boundary layer is used to reduce this wind to a common 19.5-metre level. Finally, these surface winds are input into a numerical wave model to simulate wave generation, propagation, and decay.

Descriptors :   *OCEAN WAVES, OCEANOGRAPHIC DATA, COMPUTERIZED SIMULATION, ACCESS, BOUNDARY LAYER, COMPUTATIONS, COMPUTER APPLICATIONS, DATA BASES, ENGINEERING, FRICTION, MATHEMATICAL MODELS, METEOROLOGICAL DATA, OCEAN SURFACE, OCEANS, PLANETARY ATMOSPHERES, PRESSURE, SEA STATES, SURFACES, THERMAL PROPERTIES, TIME, VARIATIONS, VERTICAL ORIENTATION, WAVES, WIND

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE