Assimilation of SSM/I-derived surface rainfall and total precipitable water for improving the GEOS analysis for climate studies

Earlier studies by Krishnamurti (1984, 1991, 1993, 1994) on physical initialization have shown that satellite-derived rain rate can be used to improve nowcasting and 1-day forecasts, but the impact is sensitive to the retrieved rainfall intensity. Since physical initialization improves the analysis...

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Bibliographic Details
Published in:Monthly weather review 2000-03, Vol.128 (3), p.509-537
Main Authors: HOU, A. Y, LEDVINA, D. V, DA SILVA, A. M, ZHANG, S. Q, JOINER, J, ATLAS, R. M, HUFFMAN, G. J, KUMMEROW, C. D
Format: Article
Language:English
Subjects:
Boundary conditions
Climate studies
Data assimilation
Earth, ocean, space
Estimates
Exact sciences and technology
External geophysics
Geophysics. Techniques, methods, instrumentation and models
Meteorological satellites
Meteorology
Physics
Precipitation
Rainfall intensity
Studies
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Summary:Earlier studies by Krishnamurti (1984, 1991, 1993, 1994) on physical initialization have shown that satellite-derived rain rate can be used to improve nowcasting and 1-day forecasts, but the impact is sensitive to the retrieved rainfall intensity. Since physical initialization improves the analysis through an improved forecast, this sensitivity is potentially an issue in satellite data applications. Results presented in this study provide a useful baseline for evaluating the performance of error covariance models in optimizing the IAU parameter estimate. [...]we have shown that satellite- derived rainfall and TPW data are useful for correcting model physics and reducing systematic errors in the assimilation fields.
ISSN:0027-0644
1520-0493
DOI:10.1175/1520-0493(2000)128<0509:aosids>2.0.co;2