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Volume 20 Issue 2

Mar.  2003

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2003 >  20(2): 195-204

Retrieval of Single-Doppler Radar Wind Field by Nonlinear Approximation

  • 1.

    Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Mathematics, Nanjing University of Technology, Nanjing 210009,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Institutes for Hydrospheric Atmospheric Sciences, Nagoya University, 464-8601 Japan


doi: 10.1007/s00376-003-0004-9

  • The methods employed in recent years to retrieve vector wind information from single-Doppler radar observation are reviewed briefly. These methods are based on a linearity hypothesis for the wind field, so the retrieved wind field is sometimes negatively affected by the non-linearity of wind. This paper proposes a new method based on a non-linear approximation technique. This method, which relies on the piecewise smooth property of the wind field and makes full use of the radar velocity data, is applied to two cases of the Huaihe River Basin Energy and Water Cycle Experiment (HUBEX) in 1998. Checked against the wind field observed by dual-Doppler radar, the retrieved wind field by the method presented in this paper yields a relatively accurate horizontal vector wind field with high resolution, as well as a reasonable estimate of the magnitude of vertical velocity.
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    • Manuscript History

    Manuscript received: 10 March 2003
    Manuscript revised: 10 March 2003
    通讯作者: 陈斌, bchen63@163.com
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    Retrieval of Single-Doppler Radar Wind Field by Nonlinear Approximation

    • 1. Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Mathematics, Nanjing University of Technology, Nanjing 210009,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Institutes for Hydrospheric Atmospheric Sciences, Nagoya University, 464-8601 Japan
    • Manuscript received: 2003-03-10
    • Manuscript revised: 2003-03-10

    Abstract: The methods employed in recent years to retrieve vector wind information from single-Doppler radar observation are reviewed briefly. These methods are based on a linearity hypothesis for the wind field, so the retrieved wind field is sometimes negatively affected by the non-linearity of wind. This paper proposes a new method based on a non-linear approximation technique. This method, which relies on the piecewise smooth property of the wind field and makes full use of the radar velocity data, is applied to two cases of the Huaihe River Basin Energy and Water Cycle Experiment (HUBEX) in 1998. Checked against the wind field observed by dual-Doppler radar, the retrieved wind field by the method presented in this paper yields a relatively accurate horizontal vector wind field with high resolution, as well as a reasonable estimate of the magnitude of vertical velocity.

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