| 水汽导风在GRAPES模式中的同化应用 |
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| 引用本文： | 田伟红,万晓敏.水汽导风在GRAPES模式中的同化应用[J].气象科技,2015,43(3):469-473. |
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| 作者姓名： | 田伟红 万晓敏 |
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| 作者单位： | 国家气象中心,北京 100081,国家气象中心,北京 100081 |
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| 基金项目： | “GRAPES数值预报系统发展专项”（GRAPES FZZX 2014 05）、公益性行业（气象）科研专项（GYHY201206007）“GRAPES全球三维变分资料同化框架的改进和业务化”资助 |
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| 摘 要： | 分析探讨了水汽导风（AMV-WV）资料的分布、质量,并使用国家气象中心准业务数值预报系统GRAPESGFS1-4-2-3版本进行了2013年5月1个月的数值预报影响试验。观测资料从国家信息中心的要素库中获取。结果显示:AMV-WV资料的主要分布在700hPa以上高度,云区QI（质量标识）大于80的AMV-WV其观测误差和红外导风相当;对数值预报影响试验表明云区AMV-WV资料对500100hPa高度上的风场分析是有改善的,分析的均方差略有减小,对6天预报500hPa高度距平相关系数提高0.02;晴空区AMV-WV的观测质量在700hPa以上相对较差,对分析和预报没有改进。
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| 关 键 词： | 水汽导风 资料同化 影响试验 |
| 收稿时间： | 2014/5/30 0:00:00 |
| 修稿时间： | 2014/10/29 0:00:00 |
Application of Water Vapor Atmospheric Motion Vectors to GRAPES |
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| Tian Weihong and Wan Xiaomin.Application of Water Vapor Atmospheric Motion Vectors to GRAPES[J].Meteorological Science and Technology,2015,43(3):469-473. |
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| Authors: | Tian Weihong and Wan Xiaomin |
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| Institution: | National Meteorology Center, Beijing 100081 and National Meteorology Center, Beijing 100081 |
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| Abstract: | The coverage and quality of AMV WV (Atmospheric Motion Vectors Water Vapor) are discussed. To verify the AMV WV impaction, the quasi operational edition GRAPES_GFS_1 4 2 3 is used to carry out a one month test. The AMV WV observations come from the data base of the National Meteorological Information Center (NMIC). The results indicate that AMV WV data distribute above 700 hPa, and the observation errors of the AMV WV with QI above 80% can compare with that of AMV IR. The assimilation of AMV WV can improve the analysis of the wind from 500 hPa to 100 hPa. The RMS of the wind analysis is reduced slightly. The anomaly correlation coefficient of the 500 hPa height for 144 hour forecast is enhanced by 0.02. The data quality of AMV WV in the clear sky above 700 hPa is relatively poor. The third experiment does not have much improvement in analysis and forecast. |
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