التفاصيل البيبلوغرافية
| العنوان: |
Assessment of 3DVAR assimilation on the Yakecan subtropical cyclone. |
| Alternate Title: |
Impacto da assimiliação 3DVAR no ciclone subtrofical Yakecan. (Portuguese) |
| المؤلفون: |
Pereira Härter, Fabricio, Calvetti, Leonardo, Hideiti Shiguemori, Elcio, Copceski Rossatto, Felipe |
| المصدر: |
Revista Ciência e Natura; 2023 Special Issue, Vol. 45, p1-14, 14p |
| مصطلحات موضوعية: |
WEATHER forecasting, CYCLONES, SIMULATION methods & models |
| مصطلحات جغرافية: |
BRAZIL |
| Abstract (English): |
In the present work, the impact of the assimilation of AMSU-A satellite data, performed through the three-dimensional variational system of the WRF weather forecast model, is evaluated. The Yakecan cyclone, a system that have caused socioeconomic damage in southern Brazil on May 17, 2022, is emulated. Extratropical systems are quite common in the region, however systems such as the Yakecan, which have hybrid characteristics are especially interesting for research purposes. The simulations performed by the WRF model capture the propagation and development of the system. However, the initial condition generated by the variational technique showed a more accurate positioning of the system than the simulation without data assimilation. This difference is fundamental for weather forecasting in southern Brazil, as the correct positioning of the system determines whether the consequences of the cyclone affect densely populated areas on the coast of the country or are limited to the adjacent ocean. [ABSTRACT FROM AUTHOR] |
| Abstract (Portuguese): |
No presente trabalho, avalia-se o impacto da assimilação dos dados do satélite AMSU-A realizada através do sistema variacional tridimensional do modelo de previsão de tempo WRF. Estuda-se o caso do ciclone Yakecan, que causou prejuízos socioeconômicos no sul do Brasil no dia 17 de maio de 2022. Sistemas extratropicais são bastante comuns na região de estudo, entretanto sistemas como o Yakecan, que possuem características mistas entre ciclone tropical e extratropical são de particular interesse. As simulações realizadas pelo modelo WRF captaram a propagação e desenvolvimento do sistema. Entretanto, a condição inicial gerada com dados de satélite mostrou um posicionamento do sistema de maneira mais precisa do que a simulação sem assimilação de dados. Essa diferença é fundamental para a previsão de tempo no sul do Brasil, uma vez que o correto posicionamento do sistema define se as consequências do ciclone atingem áreas densamente povoadas no litoral do país ou limita-se a atingir o oceano adjacente. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
