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Volume 20 Issue 4

Jul.  2003

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2003 >  20(4): 612-622

Initialization and Simulation of a Typhoon Using 4-Dimensional Variational Data Assimilation-Research on Typhoon Herb(1996)

  • 1.

    LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Mesoscale and Microscale Meteorology, National Center for Atmospheric Research, Boulder, Colorado, USA,LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Mesoscale and Microscale Meteorology, National Center for Atmospheric Research, Boulder, Colorado, USA,LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029


doi: 10.1007/BF02915504

  • The MM5 and its four dimensional variational data assimilation (4D-Var) system are used in thispaper. Based on the National Centers for Environmental Prediction/National Center for AtmosphericResearch (NCEP/NCAR) reanalysis data, the authors generate an optimal initial condition for a typhoonby using the bogus data assimilation (BDA) scheme. BDA is able to recover many of the structuralfeatures of typhoons including a warm-core vertex, the correct center position, and the strong circulation.As a result of BDA using a bogus surface low, dramatic improvement is achieved in the 72 h predictionof typhoon Herb. Through several cases, the initialization by BDA effectively generates the harmoniousinner structure of the typhoon, but which is lacking in the original analysis field. Therefore the intensityforecast is improved greatly. Some improvements are made in the track forecast, but more work still needsto be done.
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    • Manuscript History

    Manuscript received: 10 July 2003
    Manuscript revised: 10 July 2003
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Initialization and Simulation of a Typhoon Using 4-Dimensional Variational Data Assimilation-Research on Typhoon Herb(1996)

    • 1. LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Mesoscale and Microscale Meteorology, National Center for Atmospheric Research, Boulder, Colorado, USA,LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Mesoscale and Microscale Meteorology, National Center for Atmospheric Research, Boulder, Colorado, USA,LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2003-07-10
    • Manuscript revised: 2003-07-10

    Abstract: The MM5 and its four dimensional variational data assimilation (4D-Var) system are used in thispaper. Based on the National Centers for Environmental Prediction/National Center for AtmosphericResearch (NCEP/NCAR) reanalysis data, the authors generate an optimal initial condition for a typhoonby using the bogus data assimilation (BDA) scheme. BDA is able to recover many of the structuralfeatures of typhoons including a warm-core vertex, the correct center position, and the strong circulation.As a result of BDA using a bogus surface low, dramatic improvement is achieved in the 72 h predictionof typhoon Herb. Through several cases, the initialization by BDA effectively generates the harmoniousinner structure of the typhoon, but which is lacking in the original analysis field. Therefore the intensityforecast is improved greatly. Some improvements are made in the track forecast, but more work still needsto be done.

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