| 双偏振雷达评估IMERG对不同类型降水的观测精度 |
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| 引用本文： | 吴雪菲,陈爱军,余安安,陈孝腔,刘光普.双偏振雷达评估IMERG对不同类型降水的观测精度[J].气象科技,2022,50(4):476-484. |
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| 作者姓名： | 吴雪菲 陈爱军 余安安 陈孝腔 刘光普 |
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| 作者单位： | 福建省大气探测技术保障中心，福州 350008;南京信息工程大学大气物理学院，南京 210044 |
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| 摘 要： | 采用地面雨量计校准后的南京信息工程大学 (Nanjing University of Information Science & Technology, NUIST) C波段双偏振 (C band Dual Polarization Radar, NUIST CDP) 雷达降水估测数据，研究全球降水观测 (Global Precipitation Measurement, GPM) 计划多星融合降水产品 (Integrated Multi satellite Retrievals for GPM, IMERG) 对苏皖地区梅雨、台风和飑线等不同类型降水观测精度，结果表明，①梅雨降水过程中，IMERG的累计降水量整体大于NUIST CDP的累计降水量；②台风降水过程中，IMERG一定程度上低估了累计降水量较大时的降水结果；③IMERG不能很好地观测到飑线降水的空间结构，几乎没有观测到这次降水过程中的强降水区域。
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| 关 键 词： | IMERG 双偏振雷达 降水 |
| 收稿时间： | 2021/6/4 0:00:00 |
| 修稿时间： | 2022/3/24 0:00:00 |
Using Dual polarization Radar to Evaluate Accuracy of GPM/IMERG in Different Types of Precipitation Process |
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| WU Xuefei,CHEN Aijun,YU Anan,CHEN Xiaoqiang,LIU Guangpu.Using Dual polarization Radar to Evaluate Accuracy of GPM/IMERG in Different Types of Precipitation Process[J].Meteorological Science and Technology,2022,50(4):476-484. |
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| Authors: | WU Xuefei CHEN Aijun YU Anan CHEN Xiaoqiang LIU Guangpu |
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| Abstract: | The precipitation estimation ability of the integrated multi satellite retrievals for Global Precipitation Measurement (GPM/IMERG) is refined and evaluated in the study for Meiyu, typhoon and squall line precipitation, using the measurements from C band dual polarization radar from the Nanjing University of Information Science & Technology (NUIST CDP). The ground based gauges are used to calibrate the radar data. The main conclusions are: (1) IMERG overestimates the cumulative precipitation estimated by NUIST CDP during Meiyu precipitation. (2) During typhoon precipitation, when the cumulative precipitation estimated by NUIST CDP is large, IMERG greatly underestimates the precipitation of NUIST CDP. (3) IMERG performs poorly during squall line precipitation because it hardly observes heavy precipitation. |
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| Keywords: | IMERG dual polarization radar precipitation |
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