Accession Number:

AD0259439

Title:

A STUDY OF THE WIND PROFILE IN THE LOWEST 400 FEET OF THE ATMOSPHERE

Descriptive Note:

Corporate Author:

BROOKHAVEN NATIONAL LAB UPTON N Y

Personal Author(s):

Report Date:

1961-01-15

Pagination or Media Count:

1.0

Abstract:

Efforts were continued on the analysis of errors in predicting upper level wind speeds from speeds at a lower reference level by using an unweighted predictor of varying averaging length and relative displacement in time. Analyses of hindcast predictions revealed that resultant errors were slightly smaller than those for forecast predictions. However, the results show that the errors were effectively symmetrical about zero. Hindcast analysis also revealed that during unstable conditions the prediction errors were smaller for short averaging lengths. During stable conditions, the forecast predictions were lower than hindcast predictions for all averaging lengths used in the test procedure. The relationship between errors with minus L and plus L displacements was approximately the same for both simple and mean models. The same symmetry was observed in the analysis of additional runs with similar gustiness characteristics. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE