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| 用雷达反射率作对流性降水和层状云降水自动分类 | |
| 引用本文： | 吴涛,吴翠红,万玉发,舒防国.用雷达反射率作对流性降水和层状云降水自动分类[J].气象科技,2006,34(5):610-614,I0005. |
| 作者姓名： | 吴涛 吴翠红 万玉发 舒防国 |
| 作者单位： | 1. 中国气象局武汉暴雨研究所,武汉,430074;湖北省十堰市气象局,十堰,442000 2. 武汉中心气象台,武汉,430074 3. 中国气象局武汉暴雨研究所,武汉,430074 4. 湖北省十堰市气象局,十堰,442000 |
| 基金项目： | 湖北省科技攻关计划课题(2004AA306B01)，湖北省气象局科技发展基金项目(2003ZZ01资助 |
| 摘 要： | 为提高雷达定量测量降水的精度,利用武汉CINRAD/SA雷达反射率数据,研究提出了对流性降水和层状云降水自动分类算法(ACSS)。该算法在二维反射率结构场初步分类降水的基础上,识别亮带并从体扫描数据中提取降水的三维结构特征,然后对初步分类结果进行订正。试验表明,ACSS能较准确地实现对流性降水和层状云降水的自动分类,相对于只根据二维结构分类降水性能上有较大提高,主要表现在能正确识别出亮带特征明显的强层状云和对流核外沿的对流弱回波区。 |
| 关 键 词： | 武汉雷达 对流性 层状云 分类 |
| 收稿时间： | 2006-01-17 |
| 修稿时间： | 2006-01-172006-03-15 |
Automatic Convective/Stratiform Cloud Precipitation Classification Based on Radar Reflectivity |
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| Wu Tao,Wu Cuihong,Wan Yuf,Shu Fangguo.Automatic Convective/Stratiform Cloud Precipitation Classification Based on Radar Reflectivity[J].Meteorological Science and Technology,2006,34(5):610-614,I0005. | |
| Authors: | Wu Tao Wu Cuihong Wan Yuf Shu Fangguo |
| Institution: | 1 Institute of Heavy Rain, China Meteorological Administration, Wuhan 430074; 2 Shiyan Meteorological Bureau, Hubei Province, Shiyan 442000; 3 Wuhan Central Weather Office, Wuhan 430074 |
| Abstract: | To increase the accuracy of radar rainfall estimation,an automatic convective/stratiform precipitation classification algorithm based on radar reflectivity data at the Wuhan radar station is proposed.Based on the two-dimensional reflectivity field,it can identify bright bands,extract the information about the three-dimensional structure of precipitation,and use them to correct the preliminarily analyzed results.Evaluation shows that the method can separate most of the convective and stratiform cloud precipitation correctly,and the performance is obviously better than that by using two-dimensional information.Especially it can identify stratiform precipitation with an obvious bright band and weak echoes in the periphery of the convective core. |
| Keywords: | weather radar convective/stratiform cloud classification |
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