| C波段双线偏振雷达反射率因子的衰减订正及对降雨估测精度的改进 |
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| 引用本文： | 黄兴友,张磊,芦荀,李盈盈,印佳楠,马雷,张帅.C波段双线偏振雷达反射率因子的衰减订正及对降雨估测精度的改进[J].气象科学,2018,38(2):237-246. |
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| 作者姓名： | 黄兴友 张磊 芦荀 李盈盈 印佳楠 马雷 张帅 |
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| 作者单位： | 南京信息工程大学气象灾害预报预警与评估协同创新中心 |
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| 基金项目： | 国家自然科学基金资助项目（41475034）；国家重点基础研究发展计划（973计划）项目（2013CB430101） |
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| 摘 要： | C波段双线偏振雷达反射率因子易受衰减的影响,为了提高降雨的准确性,需要对雷达反射率因子进行衰减订正。K_(DP)是能够用于衰减订正的一个有效因子,本文采用小波分析法对Ф_(DP)数据进行预处理,再将处理后的数据拟合得到相对准确的K_(DP)。为了验证衰减订正的效果,利用S波段雷达反射率因子作为参考,对比分析了衰减订正前后C波段双线偏振雷达反射率因子的变化,结果表明:经过衰减订正后的Z_H更接近于S波段雷达的反射率因子。在进行降雨估测时,不同方案估测降雨的差异较大,当C波段双线偏振雷达与S波段雷达均采用Z-R关系估测降雨时,S波段雷达的效果更好。当C波段双线偏振雷达采用衰减订正后的R(Z_H,K_(DP))法估测降雨时,效果优于S波段雷达的R(Z)方案。当降雨强度10 mm·h~(-1)时,雷达估测的雨量普遍低于地面雨量计的雨量,经过雨量计校准后,可以进一步提高降雨估测精度。
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| 关 键 词： | C波段双线偏振雷达 衰减订正 降雨估测 |
| 收稿时间： | 2016/12/5 0:00:00 |
| 修稿时间： | 2017/5/20 0:00:00 |
Attenuation correction for C-band dual-polarization radar reflectivity factor and the accuracy improvement of precipitation estimation |
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| HUANG Xingyou,ZHANG Lei,LU Xun,LI Yingying,YIN Jianan,MA Lei and ZHANG Shuai.Attenuation correction for C-band dual-polarization radar reflectivity factor and the accuracy improvement of precipitation estimation[J].Scientia Meteorologica Sinica,2018,38(2):237-246. |
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| Authors: | HUANG Xingyou ZHANG Lei LU Xun LI Yingying YIN Jianan MA Lei and ZHANG Shuai |
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| Institution: | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | |
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| Keywords: | C-band linear dual-polarization radar Attenuation correction Rainfall estimation |
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