| 中国东北和西北区域三种再分析资料与探空资料的温度对比分析 |
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| 引用本文： | 支星,徐海明,米卫红,苏志侠,段项锁,唐振兴.中国东北和西北区域三种再分析资料与探空资料的温度对比分析[J].气象与环境学报,2014,30(6):147-157. |
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| 作者姓名： | 支星 徐海明 米卫红 苏志侠 段项锁 唐振兴 |
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| 作者单位： | 1. 上海市气象科技服务中心，上海 200030；2. 南京信息工程大学 大气科学学院，江苏 南京 210044；3. 南京信息工程大学 气象灾害省部共建教育部重点实验室，江苏 南京 210044 |
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| 基金项目： | 公益性行业(气象)科研专项，上海市气象局研究型业务专项(YJ201214)共同资助。 |
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| 摘 要： | 利用中国105站的探空资料以及NCEP/NCAR、ERA和JRA三种再分析资料，采用均方根误差、趋势分析等多种统计分析方法，对再分析资料的高空温度在中国东北和西北区域的可信度进行了分析。结果表明：在气候平均方面，JRA资料相比于探空资料的均方根误差较小，冬季的均方根误差较小，西北区的均方根误差普遍大于东北区；在年际变化方面，东北区三种再分析资料在低层的反映程度明显好于高层，西北区各层三种再分析资料与探空资料的差值普遍比东北区大；在长期变化方面，三种再分析资料在对流层低层都较好，东北区NCEP资料能更好地反映探空资料高层的降温趋势，而在西北区，则是JRA资料能更好地反映探空资料高层的降温趋势。
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| 关 键 词： | 探空资料 再分析资料 气候平均 REOF |
Comparative analysis of atmospheric temperature between three reanalysis datasets and radiosonde dataset in northeast and northwest of China |
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| ZHI Xing,XU Hai-ming,MI Wei-hong,SU Zhi-xia,DUAN Xiang-suo,TANG Zhen-xing.Comparative analysis of atmospheric temperature between three reanalysis datasets and radiosonde dataset in northeast and northwest of China[J].Journal of Meteorology and Environment,2014,30(6):147-157. |
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| Authors: | ZHI Xing XU Hai-ming MI Wei-hong SU Zhi-xia DUAN Xiang-suo TANG Zhen-xing |
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| Institution: | 1. Shanghai Meteorological Sci-Tech Service Center, Shanghai 200030, China; 2. School of Atmospheric Science, Nanjing University of Information Science & Technology, Nanjing 210044, China; 3. Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | Based on temperature data from radiosonde dataset at 105 stations in China and three reanalysis datasets of NCEP/NCAR, ERA and JRA, the reliability of free atmospheric temperature in the northeast and northwest of China was analyzed by methods of a root mean square error analysis and a trend analysis and so on. The results indicate that in terms of climatological mean, the root mean square error of JRA datasets is lower than that of radiosonde dataset, and it is lower in winter and higher in the northwest of China than in the northeast of China. In terms of annual variance, atmospheric temperature of three reanalysis datasets are close to that of radiosonde dataset in low layer than in upper layer in the northeast of China, while temperature differences between three reanalysis datasets and radiosonde dataset are higher in the northwest of China than in the northeast of China. In the aspect of long-term variance, three reanalysis datasets have comparable ability in reproducing the trend in lower troposphere. Cooling trend in upper layer can be better identified by the NCEP reanalysis dataset in the northeast of China, while it is by the JRA reanalysis dataset in the northwest of China. |
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| Keywords: | Radiosonde dataset Reanalysis dataset Climatological mean REOF (rotated empirical orthogonal function) |
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