Accession Number : ADA247518

Title :   Validation of the Harvard Open Ocean Model in the Gulf-Stream Region.

Descriptive Note : Final technical rept. 1 Jun-30 Nov 89,

Corporate Author : NEW ORLEANS UNIV LA

Personal Author(s) : Robinson, Allan R. ; Glenn, Scott M.

Report Date : 30 NOV 1989

Pagination or Media Count : 25

Abstract : During this contract period work was carried out on the evaluation of the Harvard Gulf-Stream forecasting system (GULFCAST). This was a continuation of work carried out under Contract No. N00014-86-K-6002. The Gulfcast system was designed for nowcasts and forecasts of 1 duration. It consisted of a quasigeostrophic dynamical model, feature models for initialization and updating, and an observational base of Infrared SST frontal locations, Geosat altimetric data when available, and a weekly dedicated AXBT flight designed to maintain accuracy via critical in situ data input (Robinson et at., EOS, TOR, 70 (45) 1464-1473, 1989). for over two years of real time forecasting, the Geosat determined standard deviation of the forecast stream axis offset was about 30 km, comparable to the noise level of its determination (Glenn et at., JCG 96(C4) 7145-7166, 1991). The system correctly forecasts approximately 75 percent of ring birth and reabsorption events.

Descriptors :   *FORECASTING, *GULF STREAM, *OCEAN MODELS, *OCEAN CURRENTS, ACCURACY, CONTRACTS, DYNAMICS, FLIGHT, MODELS, NOISE, OCEANS, RINGS, STANDARD DEVIATION, STANDARDS, STREAMS, TIME, WORK, WATER FLOW, WATER MASSES, FLOW RATE, FRONTS(OCEANOGRAPHY), OCEAN WAVES.

Subject Categories : Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE