| 辽宁汛期暴雨的大气环流特征分析 |
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| 引用本文： | 吴艳青,崔锦,阎琦.辽宁汛期暴雨的大气环流特征分析[J].气象与环境学报,2009,25(2):38-44. |
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| 作者姓名： | 吴艳青 崔锦 阎琦 |
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| 作者单位： | (1.鞍山市气象局，鞍山 114004；2.中国气象局沈阳大气环境研究所，沈阳 110016） |
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| 摘 要： | 应用合成分析、距平分析和位势平均等方法，基于美国NCEP/NCAR的再分析资料和辽宁地区逐日降水资料，对辽宁地区汛期暴雨的大气环流、风场、温度场和湿度场特征进行对比分析。结果表明：在厄尔尼诺或拉尼娜背景下，辽宁夏季多暴雨月与少暴雨月相比，对应的500 hPa高度距平场、500 hPa风矢量与温度距平叠合场以及850 hPa水汽输送矢量场，均存在着显著的差异；同样是暴雨多（少）的月份，对应的厄尔尼诺与拉尼娜背景相比，500 hPa高度距平场、500 hPa风矢量与温度距平叠合场以及850 hPa水汽输送矢量场均有不同的表现。
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| 关 键 词： | 汛期暴雨 厄尔尼诺现象 拉尼娜现象 大气环流特征 差异分析 |
| 收稿时间： | 2008-10-17 |
| 修稿时间： | 2008-12-1 |
Characteristics of atmospheric circulation of rainstorm during flood season in Liaoning province |
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| WU Yan-qing,CUI Jin,YAN Qi.Characteristics of atmospheric circulation of rainstorm during flood season in Liaoning province[J].Journal of Meteorology and Environment,2009,25(2):38-44. |
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| Authors: | WU Yan-qing CUI Jin YAN Qi |
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| Institution: | (1. Anshan Meteorological Bureau, Anshan 114004, China; 2. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China) |
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| Abstract: | Based on the reanalysis data of national center for environmental prediction/national center for atmospheric research (NCEP/NCAR) and daily precipitation data in Liaoning province from 1960 to 2006, the atmospheric circulation, wind field, temperature field and humidity field were analyzed by the composite analysis, distance average analysis, average geopotential calculation. The results show that there are obvious differences in height anomaly field at 500 hPa, wind vector field at 500 hPa, temperature anomaly superposition field at 500 hPa and water vapor transport vector field at 850 hPa, based on the comparison of frequent rainstorms month with infrequent rainstorms month in summer under the background of El Nino or La Nina. In the same frequent rainstorms month or infrequent rainstorms month, the corresponding backgrounds of El Nino and La Nina are compared, and the fields as mentioned above also have different characteristics. |
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| Keywords: | Rainstorm during flood season El Nino La Nina Characteristics of atmospheric circulation Difference analysis |
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