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Revista Brasileira de Meteorologia

versão impressa ISSN 0102-7786versão On-line ISSN 1982-4351

Resumo

ANDREOLI, Rita Valéria et al. Inclusion of the AIRS/AMSU sounding in the CPTEC global data assimilation/forecast system: impact study. Rev. bras. meteorol. [online]. 2008, vol.23, n.1, pp.88-102. ISSN 1982-4351.  http://dx.doi.org/10.1590/S0102-77862008000100009.

Remote sensing data have become the predominant source of information for providing good estimation of the initial conditions for Numerical Weather Prediction. The purpose of this study is to evaluate the impact of the AIRS/AMSU sounding on the CPTEC global data assimilation/forecast system. The impact is evaluated in terms of the difference between the forecasts and analysis fields. The results clearly indicate an improvement in the quality of the analysis and forecasts, mainly in the Southern Hemisphere, when AIRS/AMSU soundings are included in the assimilation/forecast system. Besides, the results from the initial experiments with AIRS/AMSU data indicate significant improvements in forecast skill over the Southern Hemisphere and South America, compared with the experiment without AIRS/AMSU sounding data. The improvement in the forecast skills at four days in Southern Hemisphere is equivalent to gaining an extension of forecast capability of six hours. These results indicate the potential of AIRS/AMSU sounding system to improve operational forecast skill at CPTEC/INPE.

Palavras-chave : Atmospheric Profile; data assimilation; weather prediction.

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