| 500 hPa高度场的信号场突变与我国暴雨的发生规律性研究 |
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| 引用本文： | 黄嘉佑,杨扬,周国良.500 hPa高度场的信号场突变与我国暴雨的发生规律性研究[J].大气科学,2002,26(5):625-632. |
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| 作者姓名： | 黄嘉佑 杨扬 周国良 |
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| 作者单位： | 1.北京大学地球物理系,北京,100871 |
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| 基金项目： | 国家重点基础研究发展规划项目G1998040901-1资助 |
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| 摘 要： | 作者在500hPa高度信号场与我国暴雨发生的规律研究基础上,进一步寻找高度信号场能显示与暴雨的突变现象有关的异常信号出现的地区和描述指标.发现异常信号出现的地区大致可分为三个区域:我国境外西部、我国内陆地区和我国境外东部,可以反映区域信号场的主要特征,并由此形成信号场指标.研究表明,利用致洪暴雨发生日的前期信号场指标序列,其累积距平和逐日滑动平均值与我国暴雨出现有密切关系.对我国年度暴雨短期预报分析有一定的参考价值,可以作为传统天气动力诊断与预测的补充工具.
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| 关 键 词： | 暴雨 500hPa信号场 突变分析 |
| 修稿时间： | 1/1/2002 12:00:00 AM |
Jump Phenomena in the 500 hPa Signal Field and the Occurrence of China's Heavy Rainfalls |
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| Huang Jiayou,Yang Yang and Zhou Guoliang.Jump Phenomena in the 500 hPa Signal Field and the Occurrence of China's Heavy Rainfalls[J].Chinese Journal of Atmospheric Sciences,2002,26(5):625-632. |
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| Authors: | Huang Jiayou Yang Yang and Zhou Guoliang |
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| Abstract: | Based on the previous paper entitled " A Study of the 500 hPa Signal Field about Heavy rainfall in China", the statistics is found in the 500 hPa signal field. It is found that there are three areas of significant signal: to west of China, inland of China, and to east of China, seperately. The indices representing the 500 hPa signal field are extracted. They can describe the anomaly phenomena before the occurrence of the heavy rainfall. The accumulated values and moving averages can be presented of the climate signal and be associated with the occurrence of the heavy rainfall occurrence. They are the efficient statistics being used in the heavy rainfalls on the short climate predictions. It shows that the 500 hPa-signal field is also additionally efficient tools in the synoptic diagnostic studies. |
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| Keywords: | heavy rainfall 500 hPa-signal field abrupt jump analysis |
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