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Estimating tropical cyclone central pressure and outer winds from satellite microwave dataA new technique is presented for estimating central pressure and surface winds outside of the radius of maximum winds from brightness temperatures measured by the SCAMS on Nimbus 6. The problem of estimating maximum surface winds is not treated because the spatial resolution of the radiometer is not high enough for this purpose. The technique is developed on the basis of measurements over eight typhoons and five hurricanes during 1975. It is shown that the warm 55.45-GHz brightness temperature anomaly previously observed over Typhoon June can be found over other tropical cyclones. Maximum brightness temperature anomaly correlates with central pressure with a correlation coefficient of -0.859. Outer surface wind speeds are calculated by assuming gradient balance and using the regression between brightness temperature anomaly and central pressure to estimate pressure gradients.
Document ID
19790041374
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kidder, S. Q.
(Colorado State Univ. Fort Collins, CO, United States)
Gray, W. M.
(Colorado State Univ. Fort Collins, CO, United States)
Vonder Haar, T. H.
(Colorado State University Fort Collins, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
October 1, 1978
Publication Information
Publication: Monthly Weather Review
Volume: 106
Subject Category
Meteorology And Climatology
Accession Number
79A25387
Funding Number(s)
CONTRACT_GRANT: NSG-5258
CONTRACT_GRANT: NGR-06-002-102
Distribution Limits
Public
Copyright
Other

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