The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone

Tsou Chih-Hua Tsou, P. J. Smith

    研究成果: 雜誌貢獻文章同行評審

    2 引文 斯高帕斯(Scopus)

    摘要

    Non-quasigeostrophic (NQG) processes present prior to and during the development of a blocking anticyclone over the southern tip of Greenland on 21 January 1979 are diagnosed by comparing energy quantities and height tendencies determined from quasigeostrophic (QG) estimates with the same quantities obtained from more general formulations. Energetics results indicate that NQG processes strengthened the intensity of the block and a precursor explosive cyclone. The height tendency fields show that the QG calculations, which generally yielded height changes that were larger than the more general height tendency model, produced smaller height changes associated with the northward amplification of the ridge from which the block ultimately formed. Further, these smaller values were primarily due to the QG vorticity advection. This suggests that NQG vorticity advection, which usually acted to moderate the wave developments, enhanced the block development. -from Authors

    原文英語
    頁(從 - 到)328-342
    頁數15
    期刊Tellus, Series A
    42 A
    發行號3
    出版狀態已發佈 - 1990 一月 1

    ASJC Scopus subject areas

    • Oceanography
    • Atmospheric Science

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