| 不同时次地基微波辐射计反演产品评估 |
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| 引用本文： | 刘建忠,何晖,张蔷.不同时次地基微波辐射计反演产品评估[J].气象科技,2012,40(3):332-339. |
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| 作者姓名： | 刘建忠 何晖 张蔷 |
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| 作者单位： | 北京市人工影响天气办公室,北京,100089 |
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| 基金项目： | 北京市自然科学基金资助项目“地基微波辐射计产品性能分析与应用研究”资助 |
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| 摘 要： | 利用北京大型活动期间探空和微波辐射计资料,采用统计方法进行评价分析,目的是了解该型微波辐射计的性能。结果表明:①总体平均:对温度,有降水时误差变化范围大,无降水时相对比较小,比较平稳;无降水时比有降水时更接近于探空观测结果。对相对湿度,误差的变化与温度比较相似,但从相对误差的变化来看,有降水时比无降水时小。无降水时反演的相对湿度与探空的比较一致。②不同时次:对温度,无降水时统计量随高度的变化规律性比较明显,趋势一致;有降水时的规律相对较差。无降水时,20:00误差比较小,比较接近探空;14:00误差比较大。有降水时,各时次误差比无降水时大,反演的20:00温度变化曲线与探空最接近。对相对湿度,无降水时统计量随高度的变化规律性比较明显,趋势较一致;有降水时的规律性相对比较差。总体来看,降水对微波辐射计影响较大,反演的20:00的资料误差小一些,5000m高度上下误差变化比较大,与云层有关。
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| 关 键 词： | 加密探空 微波辐射计 反演产品 评价分析 |
| 收稿时间： | 2010/11/5 0:00:00 |
| 修稿时间： | 2011/8/25 0:00:00 |
Evaluation and Analysis of Retrieval Products of Ground-Based Microwave Radiometers at Different Times |
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| Liu Jianzhong,He Hui and Zhang Qiang.Evaluation and Analysis of Retrieval Products of Ground-Based Microwave Radiometers at Different Times[J].Meteorological Science and Technology,2012,40(3):332-339. |
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| Authors: | Liu Jianzhong He Hui and Zhang Qiang |
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| Institution: | Beijing Weather Modification Office, Beijing 100089;Beijing Weather Modification Office, Beijing 100089;Beijing Weather Modification Office, Beijing 100089 |
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| Abstract: | By means of the radiosonde data and retrieved data during some important activities in Beijing, evaluation and analysis are conducted from the aspects of the errors of the total average, the differences at different times, and weather conditions with or without rainfall. The results show that (1) Total average: the error variation range of temperature was great in rainy days, and small in no rain days. The retrieved temperature from microwave radiometers was closer to the radiosonde temperature in rainy days than in no rain days. The error variation trend of relative humidity was similar to that of temperature, but for the relative error, the values in rainy days were smaller than those in no rain days. (2) Different times: the statistic parameters of temperature varied with height, and the regularity was obvious in no rain days, but not in rainy days. In no rain days, the error was the smallest at 20:00, closer to the radiosonde measurements and the greatest at 14:00. In rainy days, the errors at various times were bigger than those in no rain days, and the retrieved temperature from the microwave radiometer data at 20:00 was close to the radiosonde measurements. For relative humidity, the regularities were obvious and the variation trend was the same as in no rain days, but not in rainy days. Generally, the influence of rainfall on the retrieved data from microwave radiometers is greater. The error of the retrieved data was the smallest at 20:00. The statistic value varied most obviously at 5000 m, relative to clouds. |
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| Keywords: | intensive radiosone sounding microwave radiometer retrieval product evaluation and analysis |
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