| X波段双线性偏振雷达电磁波衰减对冰雹识别的影响 |
| |
| 引用本文： | 马建立,苏德斌,金永利,李睿劼.X波段双线性偏振雷达电磁波衰减对冰雹识别的影响[J].高原气象,2012,31(3):825-835. |
| |
| 作者姓名： | 马建立 苏德斌 金永利 李睿劼 |
| |
| 作者单位： | 1. 北京市人工影响天气办公室,北京,100089
2. 北京市气象局,北京,100089 |
| |
| 摘 要： | 利用X波段双线性偏振雷达2009年4-10月降雨的ZH-ZDR统计分布,得到基于ZH-ZDR分布的冰雹识别参量(HDR)表达式。雷达发射的电磁波经过雨区导致的衰减会使HDR识别冰雹不准确,需要进行衰减订正。文中利用差分相移(DP)订正了HDR表达式中经过雨区衰减的反射率(ZH)和差分反射率(ZDR)。个例分析表明,经雨区衰减订正后X波段双线性偏振雷达回波与北京南郊观象台CIN-RAD/SA多普勒天气雷达回波具有较高的一致性,在零度层之下,HDR>0的区域能有效地反映出地面降雹情况;在零度层之上,HDR>0的区域可能是冰雹或湿霰,订正后HDR判别冰雹的虚警率有可能提高。
|
| 关 键 词： | X波段双线性偏振雷达 冰雹识别 衰减订正 |
The Impact of Attenuation of X-Band Dual Linear Polarimetric Radar on Hail Recognition |
| |
| MA Jian-li,SU De-bin,JIN Yong-li,LI Rui-.The Impact of Attenuation of X-Band Dual Linear Polarimetric Radar on Hail Recognition[J].Plateau Meteorology,2012,31(3):825-835. |
| |
| Authors: | MA Jian-li SU De-bin JIN Yong-li LI Rui- |
| |
| Institution: | 1 (1.Beijing Weather Modification Office,Beijing 100089,China;2.Beijing Meteorology Bureau,Beijing 100089,China) |
| |
| Abstract: | The hail identification parameter′s(H_DR) formula expression of X-band dual linear polarimetric radar is derived from statistical distribution between Z_H and Z_DR rainfall data from April to October 2009. The caused attenuation of radar transmitting wave passing rain area will lead H_DR to identify hail inaccurately,so it is need to correct radar data.The differential phase shift(_DP) is used to correct the reflectivity(Z_H) and differential reflectivity(Z_DR).The case analysis shows that the reflectivity of X-band dual linear polarimetric radar has a high consistency with the reflectivity of Beijing Nanjiao CINRAD/SA doppler weather radar after correction.Below the zero-temperature level,the region of H_DR>0 can effectively reflect the ground hail shooting,and above the zero-temperature level,the region of H_DR>0 may be wet graupel or hail,and H_DR after correction may increase the false alarm rate. |
| |
| Keywords: | X-band dual linear polarimetric radar Hail recognition Attenuation correction |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
