| 青藏高原红原站平流层下部重力波观测特征分析 |
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| 引用本文： | 张灵杰,林永辉. 青藏高原红原站平流层下部重力波观测特征分析[J]. 气象科技, 2011, 39(6): 768-771 |
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| 作者姓名： | 张灵杰 林永辉 |
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| 作者单位： | 1. 中国气象科学研究院灾害天气国家重点实验室,北京100081;浙江省温州市气象局,温州325027
2. 中国气象科学研究院灾害天气国家重点实验室,北京,100081 |
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| 基金项目： | 国家自然科学基金项目（40875035）、中国气象局行业专项(GYHYQX2007620)、中国气象科学研究院基本科研业务费专项（2007Y002）和灾害天气国家重点实验室自主研究专项(2008LASWZ103)资助 |
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| 摘 要： | 利用位处青藏高原的红原探空站2008年5月垂直高分辨率的无线电探空资料分析了其上空下平流层(19～26 km)重力波的波动特性.结果表明:重力波的垂直波长主要集中在2～4 km之间,平均值约为2.9 km；水平波长主要集中在100～600 km之间,平均值约为311 km;固有频率主要集中在1.5f～3.5f(f为科氏...
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| 关 键 词： | 青藏高原 重力波 下平流层 主分量分析方法 |
| 收稿时间： | 2010-06-04 |
| 修稿时间： | 2010-07-01 |
Observational Characteristics of Gravity Waves in Lower Stratosphere over a Tibetan Plateau Station |
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| Zhang Lingjie and Lin Yonghui. Observational Characteristics of Gravity Waves in Lower Stratosphere over a Tibetan Plateau Station[J]. Meteorological Science and Technology, 2011, 39(6): 768-771 |
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| Authors: | Zhang Lingjie and Lin Yonghui |
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| Affiliation: | 1 State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081; 2 Wenzhou Meteorological Service, Zhejiang, Wenzhou 325027;1 State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081; |
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| Abstract: | Using the high vertical resolution radiosonde data of May 2008 at the Hongyuan meteorological station located in the Tibetan Plateau, the observational characteristics of gravity waves in the lower stratosphere （19 to 26 km） are investigated. The results show that the dominant vertical wavelengths of the gravity waves are 2 to 4 km, with a mean value of 2.9 km; the dominant horizontal wavelengths are 100 to 600 km, with an average value of 311 km; the intrinsic frequency is dominated by 1.5f to 3.5f （Coriolis parameter）, with a medium value of 2.5f, corresponding to an intrinsic period of 9 hours. The dominant （85%） wave energy propagation direction is upward; the horizontal propagation direction is mainly eastward. The dominant vertical intrinsic phase velocities range from -0.2 to 0.05 m/s, with an average value of -0.12 m/s; the dominant horizontal intrinsic phase velocities range from 5 to 15 m/s, with a mean value of 11.3 m/s. |
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| Keywords: | Tibetan Plateau gravity wave lower stratosphere principal component analysis |
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