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| 模拟台风Ewiniar（2006）内部扰动的时空变化特征 | |
| 引用本文： | 冯琎,孙照渤,沈新勇,李艳杰.模拟台风Ewiniar（2006）内部扰动的时空变化特征[J].气象与减灾研究,2009,32(2):11-19. |
| 作者姓名： | 冯琎 孙照渤 沈新勇 李艳杰 |
| 作者单位： | 1. 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;中国气象科学研究院灾害天气国家重点实验室,北京100081;中国人民解放军95561部队气象室,西藏拉萨850000 2. 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 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;中国气象科学研究院灾害天气国家重点实验室,北京100081 4. 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;中国科学院大气物理研究所1ASG,北京100029 |
| 基金项目： | 国家自然科学基金，公益性行业科研专项经费项目，国家重点基础研究发展规划(973计划) |
| 摘 要： | 在使用WRF（V2．2）模式双向移动嵌套方案对台风Ewiniar模拟结果的基础上，利用空间上的离散功率谱和时间上的连续功率谱、最大熵谱方法对Ewiniar内部扰动的时空变化特征作简要的分析。结果表明：台风内部波动在空间上以长波分量占优，距台风中心越近，长波分量的比重越大，而台风外围的短波分量则有所增加；Ewiniar内部的振荡现象具有非对称特征，这种非对称特征在对流层中高层及台风前移的左右两侧的眼壁内表现得非常明显，越往台风外围、越往对流层低层越不明显；对流层低层的台风眼壁内部，无论是台风前移的左侧还是右侧，低频振荡总是占很大优势。 |
| 关 键 词： | Ewiniar台风 数值模拟 功率谱 最大熵谱 |
TEMPORAL AND SPATIAL VARIATION CHARACTERISTICS OF SIMULATED TYPHOON EWINIAR (2006) |
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| Feng Jin,Sun Zhaobo,Shen Xinyong,Li Yanjie.TEMPORAL AND SPATIAL VARIATION CHARACTERISTICS OF SIMULATED TYPHOON EWINIAR (2006)[J].Meteorology and Disaster Reduction Research,2009,32(2):11-19. | |
| Authors: | Feng Jin Sun Zhaobo Shen Xinyong Li Yanjie |
| Institution: | 1. Key Laboratory of Meteorological Disaster of Ministry of Education, NUIST, Nanjing 210044, China; 2. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beoijing 00081, China ;3. Meteorological Section of PLA No.95561, Xizang Autonomous Region, Lasa 850000, China ;4. LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029, China) |
| Abstract: | Based on the numerical simulation on typhoon Ewiniar by use of the WRF （weather research and forecasting） model V2.2 and the two way movable nesting technology, the temporal and spatial characteristics of perturbations in Ewiniar has been analyzed briefly by means of power spectrum and maximum entropy spectrum methods. The results show that the long wave component dominates inside the typhoon; the nearer the distance to the typhoon center, the greater the long wave component. However the short wave component increases around the periphery of the typhoon. The oscillation inside typhoon Ewiniar is asymmetrical, the asymmetry is very remarkable at the middle and upper levels of the troposphere and within the eyewall but blur in the outer region of the typhoon and at the low level. The low frequency oscillation dominates in the inner region within typhoon eyewall at the low level. |
| Keywords: | Typhoon Ewiniar Numerical simulation Power spectrum Maximum entropy spectrum |
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