A Simulated Preconditioning of Typhoon Genesis Controlled by a Boreal Summer Madden-Julian Oscillation Event in a Global Cloud-system-resolving Model

DOI Web Site 被引用文献14件 参考文献21件 オープンアクセス

書誌事項

公開日
2009
DOI
  • 10.2151/sola.2009-017
公開者
公益社団法人 日本気象学会

説明

A preconditioning of a typhoon genesis over the North Western Pacific by an Madden-Julian Oscillation (MJO) event is simulated in a boreal summer numerical experiment conducted using a global cloud-system-resolving model. The simulation highlights the importance of the following processes in the typhoon genesis that were not clearly captured in the conventional general circulation models: as the MJO propagates over that region, the easterly shear (with an enhanced low-level westerly) of the western branch of the MJO’s circulation moderates the climatological westerly shear that is otherwise persistent and inhibits cyclogenesis there. Meanwhile, its attendant cyclonic vorticity from the westerly region migrates northward, causing the genesis to occur. The trough in the upper troposphere at 15°-20°N is found to contribute to the genesis. The result demonstrates the performance of a global cloud-system-resolving model at predicting tropical cyclogenesis associated with the MJO in the North Western Pacific during the active typhoon season in boreal summer.

収録刊行物

  • SOLA

    SOLA 5 65-68, 2009

    公益社団法人 日本気象学会

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参考文献 (21)*注記

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