Recent Standard Ocean Evaluation Results.
Abstract
This report evaluates recent changes in NAVOCEANO's Generalized Digital Environmental Model. GDEM is the prime candidate for Standard Ocean--a system for retrieving oceanographic and acoustic data in 1 deg x 1 deg oceanic squares, formatted for NORDA's numerical acoustic models and usable by nonspecialists. Eighteen recent GDEM (Mod 1) sound speed (SS) profiles for various locations and seasons in the North Pacific are compared with typical real SS profiles selected by NOSC as well as previously reported GDEM (Mod 0) results. Mod 1 is better able than Mod 0 to match the typical real profiles at most locations. Mod 1 values now lie within the envelope of observed data and show decreased deep seasonal shifts. Further, the mean typical-minus-GDEM SS differences and standard deviations improve in Mod 1. However, Mod 1 still has difficulty representing secondary sound channels accurately and, in areas of high variability or few observations, occasionally shows a decreased matching ability. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1980
- Accession Number
- ADA087394
Entities
People
- S. C. Daubin Jr.