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Initialization of a modeled convective storm using Doppler radar-derived fieldsA method is developed to initialize convective storm simulations with Doppler radar-derived fields. Input fields for initialization include velocity, rainwater derived from radar reflectivity, and pressure and temperature fields obtained through thermodynamic retrieval. A procedure has been developed to fill in missing wind data, followed by a variational adjustment to the filled wind field to minimize 'shocks' that would otherwise cause the simulated fields to deteriorate rapidly. A series of experiments using data from a simulated storm establishes the feasibility of the initialization method. Multiple-Doppler radar observations from the 20 May 1977 Del City tornadic storm are used for the initialization experiments. Simulation results are shown and compared to observations taken at a later time. The simulated storm shows good agreement with the subsequent observations, though the simulated storm appears to be evolving faster than observed. Possible reasons for the discrepancies are discussed.
Document ID
19940035564
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lin, Ying
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Ray, Peter S.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Johnson, Kenneth W.
(Florida State Univ. Tallahassee, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1993
Publication Information
Publication: Monthly Weather Review
Volume: 121
Issue: 10
ISSN: 0027-0644
Subject Category
Meteorology And Climatology
Accession Number
94A12219
Funding Number(s)
CONTRACT_GRANT: NSF ATM-86-19957
CONTRACT_GRANT: NAG5-1869
CONTRACT_GRANT: NSF ATM-86-04143
CONTRACT_GRANT: NAG8-631
CONTRACT_GRANT: NAG10-0065
Distribution Limits
Public
Copyright
Other

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