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| 多普勒雷达径向散度与强对流回波变化特征分析 | |
| 引用本文： | 王艳兰,汤达章,唐伍斌,周文志,王丽荣.多普勒雷达径向散度与强对流回波变化特征分析[J].热带气象学报,2007,23(6):659-663. |
| 作者姓名： | 王艳兰 汤达章 唐伍斌 周文志 王丽荣 |
| 作者单位： | 1. 广西桂林市气象局,广西,桂林,541001;南京信息工程大学,江苏,南京,210044 2. 南京信息工程大学,江苏,南京,210044 3. 广西桂林市气象局,广西,桂林,541001 4. 河北省石家庄市气象局,河北,石家庄,050081 |
| 摘 要： | 运用多普勒雷达的径向速度资料，采用极坐标散度差分公式计算对流回波单体的径向散度值，利用回波辐合总量及辐合中心值与反射率因子、垂直累积液态含水量及中心值进行对比分析。结果表明：回波的强中心与低层径向辐合中心对应；低层径向辐合有利于回波维持或加强；径向辐合中心值的变化对未来回波强度变化有一定的指示意义，对于强对流回波的指示意义更为明显。经过对两次冰雹天气过程的应用检验，结果证明，低层径向辐合对强对流灾害性天气的临近预报有一定的指导作用。 |
| 关 键 词： | 多普勒雷达 径向辐合 回波变化 临近预报 |
| 文章编号： | 1004-4965（2007）06-0659-05 |
| 收稿时间： | 2006-06-28 |
| 修稿时间： | 2007-02-15 |
DOPPLER RADAR CHARACTER ANALYSIS ON RADIAL DIVERGENCE AND ECHO CHANGE OF STRONG CONVECTIVE |
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| WANG Yan-lan,TANG Da-zhang,TANG Wu-bin,ZHOU Wen-zhi and WANG Li-rong.DOPPLER RADAR CHARACTER ANALYSIS ON RADIAL DIVERGENCE AND ECHO CHANGE OF STRONG CONVECTIVE[J].Journal of Tropical Meteorology,2007,23(6):659-663. | |
| Authors: | WANG Yan-lan TANG Da-zhang TANG Wu-bin ZHOU Wen-zhi and WANG Li-rong |
| Institution: | Guangxi Province Guilin Meteorological Observatory, Guilin 541001, China;Nanjing University of Information Science and Technology, Nanjing 210044, China;Nanjing University of Information Science and Technology, Nanjing 210044, China;Guangxi Province Guilin Meteorological Observatory, Guilin 541001, China;Guangxi Province Guilin Meteorological Observatory, Guilin 541001, China;Shijiazhuang Meteorological Observatory of Hebei Province, Shijiazhuang 050081, China |
| Abstract: | By means of new generation Doppler weather radar radial velocity products and divergence difference formula in polar coordinates,the value of cloud-echos' divergence are calculated.The result indicate that the strong center of echos are corresponding with convergence center in low level,it is benefit that echos maintain or strengthen while radial convergence in low level;the value of convergence center as well as its change rate are effective to forecast the variational trend of echos,especially to convectional,which have more obvious indications.Based on two hail weather process,the investigation suggest that the radial convergence in low level is useful to the nowcasting of strong convectional disaster weather. |
| Keywords: | Doppler radar radial velocityconvergence change of echos nowcasting |
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