A STATISTICAL EXAMINATION OF THE 500-MB 48-HR PROGNOSES PREPARED BY FLEET NUMERICAL WEATHER FACILITY, MONTEREY, CALIFORNIA
Abstract
The Fleet Numerical Facility (FNWF) 500-mb long wave prognoses at latitudes 20N through 70N were analyzed statistically for possible error-bias. FNWF issued a correction field (verified minus prognostic) for each latitude circle and day under study as well as the initial height field 48 hours earlier. Fourier analyses of both the correction fields and the initial height fields were made. Spectral analyses of the correction fields indicated that more than 60% of the error lay in correction-waves 1, 2, and 3 at all lati tudes and that this figure increased northward. The queof stabilization of the ultra-long waves (1, 2, and 3), using the present opera tional barotropic model is investigated. The model seems to retard waves 1 and 3 at the lower and middle latitudes, and to move them too far at high latitudes. The results for wave 2 are somewhat less conclusive, but are generally in agreement with those for waves 1 and 3.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0412914
Entities
People
- Frank C. Nelson Jr.
- Roger W. Kelly
Organizations
- Naval Postgraduate School