地基遥感雷达反演云中降水参数有助于认识降水云微物理过程,本文提出一种直接由垂直指向雷达回波谱参数估算雨滴谱参数的方法;当雨滴谱满足Gamma函数分布时,联合雷达气象方程、雨滴下降末速度与雨滴直径关系,建立雷达降水回波谱参数反...地基遥感雷达反演云中降水参数有助于认识降水云微物理过程,本文提出一种直接由垂直指向雷达回波谱参数估算雨滴谱参数的方法;当雨滴谱满足Gamma函数分布时,联合雷达气象方程、雨滴下降末速度与雨滴直径关系,建立雷达降水回波谱参数反演雨滴谱参数的方程组,采用隐函数显化和级数展开进行方程求解,得到雨滴谱参数估算结果。用正演方法建立检验数据库,使用平均相对误差平均值对近似求解的雨滴谱参数精度进行检验,截距参数为0.83%、斜率参数为3.04%、形状参数为13.60%。对2012年7月22-23日云南腾冲的1320 M Hz雷达垂直波束探测降水回波谱参数进行了雨滴谱参数估算,并与地面激光雨滴谱仪获取的雨滴谱参数进行了比较,两者的平均粒径基本相同。使用风廓线雷达等垂直探测雷达回波谱参数估算雨滴谱参数的方法适用于稳定层状降水云。展开更多
To describe both the way in which a wave spectrum grows and the growth processes of realistic wave conditions,the dependence relationship between the spectrum parameters and wind parameters must be obtained. Based on ...To describe both the way in which a wave spectrum grows and the growth processes of realistic wave conditions,the dependence relationship between the spectrum parameters and wind parameters must be obtained. Based on data measured in 2010 by a Wave Rider buoy,which was deployed in the South China Sea at coordinates 21.89°N,115.13°E,we evaluated the wave spectrum in the sea area when affected by three typhoons:Conson,Chanthu,and Megi. The Joint North Sea Wave Project spectrum was parameterized based on the observed wave spectrum. We proposed a spectrum with three parameters:the dimensionless lowest moment of the spectrum,dimensionless peak frequency,and spectrum width. The relationships between these spectral parameters and the dimensionless fetch were also discussed.展开更多
文摘地基遥感雷达反演云中降水参数有助于认识降水云微物理过程,本文提出一种直接由垂直指向雷达回波谱参数估算雨滴谱参数的方法;当雨滴谱满足Gamma函数分布时,联合雷达气象方程、雨滴下降末速度与雨滴直径关系,建立雷达降水回波谱参数反演雨滴谱参数的方程组,采用隐函数显化和级数展开进行方程求解,得到雨滴谱参数估算结果。用正演方法建立检验数据库,使用平均相对误差平均值对近似求解的雨滴谱参数精度进行检验,截距参数为0.83%、斜率参数为3.04%、形状参数为13.60%。对2012年7月22-23日云南腾冲的1320 M Hz雷达垂直波束探测降水回波谱参数进行了雨滴谱参数估算,并与地面激光雨滴谱仪获取的雨滴谱参数进行了比较,两者的平均粒径基本相同。使用风廓线雷达等垂直探测雷达回波谱参数估算雨滴谱参数的方法适用于稳定层状降水云。
基金Supported by the National High Technology Research and Development Program of China(863 Program)(No.2013AA09A505)the National Natural Science Foundation of China(Nos.U1133001,41406017,41376027)the NSFC-Shandong Joint Fund for Marine Science Research Centers Grant(No.U1406401)
文摘To describe both the way in which a wave spectrum grows and the growth processes of realistic wave conditions,the dependence relationship between the spectrum parameters and wind parameters must be obtained. Based on data measured in 2010 by a Wave Rider buoy,which was deployed in the South China Sea at coordinates 21.89°N,115.13°E,we evaluated the wave spectrum in the sea area when affected by three typhoons:Conson,Chanthu,and Megi. The Joint North Sea Wave Project spectrum was parameterized based on the observed wave spectrum. We proposed a spectrum with three parameters:the dimensionless lowest moment of the spectrum,dimensionless peak frequency,and spectrum width. The relationships between these spectral parameters and the dimensionless fetch were also discussed.
