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Physical initialization using SSM/I rain ratesFollowing our recent study on physical initialization for tropical prediction using rain rates based on outgoing long-wave radiation, the present study demonstrates a major improvement from the use of microwave radiance-based rain rates. A rain rate algorithm is used on the data from a special sensor microwave instrument (SSM/I). The initialization, as before, uses a reverse surface similarity theory, a reverse cumulus parameterization algorithm, and a bisection method to minimize the difference between satellite-based and the model-based outgoing long-wave radiation. These are invoked within a preforecast Newtonian relaxation phase of the initialization. These tests are carried out with a high-resolution global spectral model. The impact of the initialization on forecast is tested for a complex triple typhoon scenario over the Western Pacific Ocean during September 1987. A major impact from the inclusion of the SSM/I is demonstrated. Also addressed are the spin-up issues related to the typhoon structure and the improved water budget from the physical initialization.
Document ID
19940035510
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Krishnamurti, T. N.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bedi, H. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ingles, Kevin
(Florida State Univ. Tallahassee, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Tellus, Series A - Dynamic Meteorology and Oceanography
Volume: 45A
Issue: 4
ISSN: 0280-6495
Subject Category
Meteorology And Climatology
Accession Number
94A12165
Funding Number(s)
CONTRACT_GRANT: NSF ATM-88-12053
CONTRACT_GRANT: NAG5-1595
CONTRACT_GRANT: N00014-89-J-1476
Distribution Limits
Public
Copyright
Other

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