The Effect of Smoothing the Doppler Radar Derived Wind Field on Perturbation Pressure Retrieval.
Abstract
Gridded u and v wind components derived from dual-Doppler radar data were utilized to study the behavior of the perturbation pressure field when different amounts of smoothing were applied to the wind field. Data-void areas in the wind field were filled by extrapolation. Three-point and nine-point smoothing operators were employed to smooth the wind field prior to retrieving the perturbation pressure field. Smoothing the wind field produced a nonlinear variation of the central pressure value in a meso-low with respect to the smoothing parameter. The central pressure value decreased as the smoothing parameter increased. Pressure centers less than 0.1 kPa (1 mb) in absolute magnitude tended to amplify and migrate slightly. False pressure centers created by the data-void filling technique were removed when a smoothing parameter greater than or equal to 0.4 was employed. Smoothing parameters greater than or equal to 0.5 created a false pressure center. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1986
- Accession Number
- ADA166631
Entities
People
- George Philip Rosser Jr
Organizations
- Air Force Institute of Technology