| 北半球冬季中纬度位势高度场的季节内振荡 |
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| 引用本文： | 姚素香,龚克坚,赵琛.北半球冬季中纬度位势高度场的季节内振荡[J].气象科学,2016,36(5):622-628. |
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| 作者姓名： | 姚素香 龚克坚 赵琛 |
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| 作者单位： | 南京信息工程大学 气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室, 南京 210044,南京信息工程大学 气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室, 南京 210044;民航宁夏空管分局气象台, 宁夏 750009,南京信息工程大学 气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室, 南京 210044 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）项目（2015CB453201）；科技部公益性行业（气象）科研专项（GYHY201406022） |
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| 摘 要： | 利用1979—2012年逐日NCEP/DOE再分析资料,分析北半球中纬度冬季(11月1日—4月30日)对流层位势高度的季节内振荡特征。结果表明:对流层上层位势高度的季节内变化强度较中下层更强,中心主要位于太平洋和大西洋上空;对流层上层位势高度场主要为1~3波的超长波形势,功率谱分析结果表明其时间序列呈现显著的季节内振荡(10~60 d)特征;10~60 d滤波的位势高度异常空间分布与原异常场一致,位势高度季节内振荡随时间主要表现为向西传播的特征,尤其表现在北太平洋上空,而亚欧大陆更为复杂一些;亚洲冬季风对北半球中纬度位势高度的季节内振荡有响应,主要表现为蒙古高压位置和强度的异常,继而对我国冬季气温产生影响。
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| 关 键 词： | 季节内振荡 位势高度 亚洲冬季风 |
| 收稿时间： | 2015/5/28 0:00:00 |
| 修稿时间： | 8/2/2015 12:00:00 AM |
Intraseasonal oscillation of the winter geopotential height in the middle latitude of the Northern Hemisphere |
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| YAO Suxiang,GONG Kejian and ZHAO Chen.Intraseasonal oscillation of the winter geopotential height in the middle latitude of the Northern Hemisphere[J].Scientia Meteorologica Sinica,2016,36(5):622-628. |
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| Authors: | YAO Suxiang GONG Kejian and ZHAO Chen |
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| Institution: | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China;Meteorological Observatory of Ningxia Civil Aviation ATC, Ningxia 750009, China and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/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 the NCEP/DOE reanalysis data from 1979 to 2012, the intraseasonal oscillation characteristics of the winter geopotential height in Northern Hemisphere were analyzed. Results show that:the intraseasonal variation strength is stronger in the upper-troposphere than that in the lower troposphere; the maximum variability appears over the Atlantic and the Pacific; in the upper troposphere, the geopotential height presents 1 to 3 waves with the obvious intraseasonal oscillation (ISO) characteristics (10-60 day oscillation);the intraseasonal oscillations (10-60 day filtered) propagate westward;the ISO of the geopotential height in the upper troposphere influences the Asian winter monsoon systems, such as Mongolia high and probably leads to the air temperature anomaly in the monsoon areas to maintain for a long time. |
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| Keywords: | Intraseasonal oscillation Geopotential height Asian winter monsoon |
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