APPLICATION OF DOPPLER RADAR TO STORM DYNAMICS.

Abstract

The variance due to vertical wind shear is calculated for Doppler wind measurements using a realistic beam pattern. The effect of reflectivity changing with height is evaluated. The existence of horizontal wind shear is analyzed from measurements by Doppler radar in widespread precipitation. The method of determining wind velocity, divergence and deformation is summarized. By representing the distribution of precipitation fall speeds with a Gaussian function, rain intensity and liquid water content are determined as a function of the reflectivity, the mean fall velocity and the standard deviation. A case of sorting of a Marshall-Palmer drop size distribution is analyzed. Multigate Doppler observations in snow demonstrate the feasibility of measuring the translation, dimension and amplitude of microscale turbulence. Eddies at low levels have periods of about one minute and dimensions of 0.4 km. These increase at higher levels. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0649317

Entities

People

  • Raymond Wexler

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Atmospheric Motion
  • Doppler Radar
  • Dynamics
  • Intensity
  • Measurement
  • Microbalances
  • Observation
  • Physical Properties
  • Precipitation
  • Radar
  • Reflectivity
  • Turbulence
  • Wind
  • Wind Shear
  • Wind Velocity

Fields of Study

  • Environmental science

Readers

  • Atmospheric Remote Sensing.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Regression Analysis.