EVERGLADES WIND VARIABILITY VS SOLAR RADIATION INTENSITY.
Abstract
Pibal wind data were collected in the Florida Everglades in support of field tests. From these wind data it was hoped to determine the relationship between wind variability and stability as represented by the intensity of solar radiation at the surface of the earth. A variation in the wind, as defined in this study, is the magnitude of the vector difference between the wind velocities which occurred on two different occasions. The overall wind variability of the time interval in question was taken as the root-mean-square (RMS) variation. The variability time intervals studied were 3, 6, 10, 20, 30, 45, and 60 minutes. Data were classified into three stability regimes based on solar radiation, which in turn were affected by cloud cover. During days of clear skies, there was only a slight increase of variability with increasing variability time interval. During overcast sky conditions, the wind variability more than doubled as one progressed from three-minute to sixty-minute intervals of variability. As a result, the variability was proportional to the amount of solar radiation at the earth's surface during the shortest time intervals. As time intervals increased in length, the trend gradually reversed, resulting in an inverse relationship between variability and solar radiation for the longest time intervals. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0675399
Entities
People
- Laurence J. Budney
Organizations
- United States Army Communications-Electronics Command