RADAR MEASUREMENTS OF SERVERE STORMS IN NEW ENGLAND
Abstract
Two investigations concerning severe storms are presented. Basic data for both are iso-echo contours of the averaged, range-corrected signal, photographed from the PPI of a 10-cm radar. These quantitative measurements at a wavelength unaffected by rain attenuation are particularly suitable for the study of severe storms. A numerical investigation of New England squall lines was undertaken to provide a quantitative description which can be used for statistical analysis and as a basis for formulating and testing dynamic models. Eight squall lines are analyzed and three charts are plotted for each one: a total intensity chart which shows the rate at which water is being precipitated in the whole line as a function of time; a space composite showing the distribution of rain in a moving grid attached to the squall line; a time-space composite showing the distribution of rain along the line as a function of time. The use of a coordinate system attached to the line permitted investigation of changes in internal structure while eliminating effects produced by the motion of the line as a whole. The time scale was roughly the same for all the lines as were the motions and orientation with respect to the prevailing wind. Strong similarities in internal structure were noted.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1962
- Accession Number
- AD0284812
Entities
People
- Pauline M. Austin
Organizations
- Massachusetts Institute of Technology