TWP-ICE/ACTIVE MONSOON CASE STUDY
Doppler velocity profiles based on measurements (white symbols) versus sample case study simulations (colored symbols):
Comments:
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Convective and stratiform areas in data and model results are identified at 3-km elevation from collocated
C-pol radar data at 3 km elevation according to the algorithm described in `Climatological
characterization of three-dimensional
storm structure from operational radar and rain gauge data' by M. Steiner, R. A. Houze, Jr., and S. E. Yuter,
Journal of Applied Meteorology, 34, 1978-2007, 1995. Profiles are means of
reflectivities > 0 dBZ in columns identified as either convective or stratiform.
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S-band vertically pointing profiler (2835-MHz) data are supplied by Christopher Williams.
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S-band times identified as convective and stratiform using C-pol data.
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Values contributing to each altitude range plotted as a function of collocated reflecitivity:
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All measurement data have been downloaded from the DOE ARM data archive (www.arm.gov) and use in publications is
subject to the policies described there.
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Model results are derived from fields reported at 3-hour frequency and 0.9-km resolution
over a domain size of about 37,000 km2.
Preliminary summary:
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The S-band observes deep, strong updrafts (directly over the instrument)
only during event C (stratiform areas are observed during events A and B). Statistics for convective columns
are poor for a vertically-pointing instrument over a two-week period, but stratiform areas are more uniform,
more common, and better-sampled.