Accession Number : ADA300493

Title :   Variability of CN(2) and Wind as Seen by the 50-MHz Radar at WSMR.

Descriptive Note : Final rept.,

Corporate Author : SAINT CLOUD STATE UNIV MN

Personal Author(s) : Nastrom, Gregory D.

PDF Url : ADA300493

Report Date : AUG 1995

Pagination or Media Count : 77

Abstract : The mean vertical profile of the refractivity turbulence structure constant CN2 and its variability with season, time of day, and background weather conditions at White Sands Missile Range (WSMR), NM from approximately 5 to 20 km altitude are described. Observations, taken with a very high frequency 5O MHz profiling radar located at WSMR from January 1991 through April 1994, are used to describe the variability of windspeed, vertical wind shear, spectral width, and volume reflectivity calibrated as CN2. CN2 is lognormally distributed, shows very small diurnal and interannual variation at all heights, has maximum value in the troposphere during summer, and shows small seasonal variation in the stratosphere. The typical time between statistically independent observations of CN2 is approximately 2 h. Daily values of CN2 depend strongly on local weather conditions, resulting in a strong correlation of meridional wind direction in the troposphere and indicators of gravity wave activity in the stratosphere. A simple regression model for estimating CN2 is presented.

Descriptors :   *RADAR METEOROLOGY, *RADAR REFLECTIONS, *WIND SHEAR, MATHEMATICAL MODELS, REGRESSION ANALYSIS, PROFILES, SEASONAL VARIATIONS, VERTICAL ORIENTATION, WIND VELOCITY, MEAN, TROPOSPHERE, INDICATORS, STRATOSPHERE, GRAVITY WAVES.

Subject Categories : Meteorology
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE