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A case study using kinematic quantities derived from a triangle of VHF Doppler wind profilersHorizontal divergence, relative vorticity, kinematic vertical velocity, and geostrophic and ageostrophic winds are computed from Colorado profiler network data to investigate an upslope snowstorm in northeastern Colorado. Horizontal divergence and relative vorticity are computed using the Gauss and Stokes theorems, respectively. Kinematic vertical velocities are obtained from the surface to 9 km by vertically integrating the continuity equation. The geostrophic and ageostrophic winds are computed by applying a finite differencing technique to evaluate the derivatives in the horizontal equations of motion. Comparison of the synoptic-scale data with the profiler network data reveals that the two datasets are generally consistent. Also, the profiler-derived quantities exhibit coherent vertical and temporal patterns consistent with conceptual and theoretical flow fields of various meteorological phenomena. It is suggested that the profiler-derived quantities are of potential use to weather forecasters in that they enable the dynamic and kinematic interpretation of weather system structure to be made and thus have nowcasting and short-term forecasting value.
Document ID
19900024833
Document Type
Reprint (Version printed in journal)
Authors
Carlson, Catherine A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Forbes, Gregory S. (Pennsylvania State University University Park, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1989
Publication Information
Publication: Journal of Atmospheric and Oceanic Technology
Volume: 6
ISSN: 0739-0572
Subject Category
METEOROLOGY AND CLIMATOLOGY
Report/Patent Number
AD-A225336
Funding Number(s)
CONTRACT_GRANT: F19628-86-C-0026
CONTRACT_GRANT: F19628-85-K-0011
Distribution Limits
Public
Copyright
Other