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中文摘要: 采用η坐标中尺度有限区域模式，对98·7鄂东沿江突发性特大暴雨进行了数字化天气雷达探测降水资料调整湿度廓线的一维变分同化的敏感性试验。对湿度廓线初猜场X(0) 所做的敏感性试验结果表明:不同的湿度廓线初猜场X(0)对目标函数的下降速度有非常大的影响，而且在观测降水Ro≠0 ，模式背景降水Rb=0的特定情形下，采用不同的湿度廓线初猜场方案会对降水资料变分同化的成功与否产生重要影响。
中文关键词: 降水，变分同化，温度括线
Abstract:With limited area meso-scale numerical model under η-coordinate,sensitivity experiments of retrieving model humidity profiles by one-dimensional variational assimilation of digital weather radar-derived precipitation are studied for the abrupt heavy rainfall along the Yangtze River in the east part of Hubei Province. Results show as follows. Different initial values X(0)of humidity profiles have great effects on the decline of the object function, and different initial evaluation schemes of humidity profiles have substantial effects on the results of rainfall variational assimilation under the special condition that model background precipitation equals to zero while observation precipitation does not equal to zero.
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基金项目:“十五”国家重点科技攻关计划项目“中国气象数值预报技术创新研究”2001BA607B号课题、国家重点基础研究发展规划项目“我国重大气候和天气灾害形成机理与预测理论研究”G1998040910号课题及湖北省科技攻关计划项目2001AA313B01号课题共同资助
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引用文本：
王叶红,赵玉春,崔春光,2004.雷达降水资料一维变分同化的敏感性研究[J].气象,30(4):6-10.
,2004.Sensitivity Research on One-Dimensional Variational Assimilation of Radar-Derived Precipitation Data[J].Meteor Mon,30(4):6-10.
王叶红,赵玉春,崔春光,2004.雷达降水资料一维变分同化的敏感性研究[J].气象,30(4):6-10.
,2004.Sensitivity Research on One-Dimensional Variational Assimilation of Radar-Derived Precipitation Data[J].Meteor Mon,30(4):6-10.