| 藏北高原夏季典型天气大气边界层特征分析 |
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| 引用本文： | 谷良雷,胡泽勇,吕世华,姚济敏.藏北高原夏季典型天气大气边界层特征分析[J].冰川冻土,2006,28(6):893-899. |
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| 作者姓名： | 谷良雷 胡泽勇 吕世华 姚济敏 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000 |
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| 基金项目： | 国家重点基础研究发展计划项目(2005CB422003-6)资助 |
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| 摘 要： | 利用加密探空资料,分析了藏北高原那曲和安多地区夏季典型晴天与阴天边界层风速、位温与比湿时空分布及变化特征.结果发现:在夏季8月,上述地区东西分量风速(切变)晴天均比阴天小,安多地区盛行偏西风,那曲地区盛行偏东风;南北分量风速(切变)晴天比阴天大.边界层晴天和阴天白天(晚上)的对流(稳定)边界层特征明显,阴天稳定边界层的厚度和对流边界层的高度较晴天时的都低;比湿夜间比白天大,阴天比晴天大.在安多地区和那曲地区都出现了逆湿现象,强逆湿主要出现在午夜或正午.
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| 关 键 词： | 藏北高原 风速 位温 比湿 |
| 文章编号： | 1000-0240(2006)06-0893-07 |
| 收稿时间： | 04 19 2006 12:00AM |
| 修稿时间： | 06 7 2006 12:00AM |
Atmosphere Boundary Layers in Typical Days over the North Tibet Plateau during Summer |
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| GU Liang-lei,HU Ze-yong,L Shi-hua,YAO Ji-min.Atmosphere Boundary Layers in Typical Days over the North Tibet Plateau during Summer[J].Journal of Glaciology and Geocryology,2006,28(6):893-899. |
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| Authors: | GU Liang-lei HU Ze-yong L Shi-hua YAO Ji-min |
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| Institution: | Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China |
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| Abstract: | By using the radiosonde data,the temporal and spatial distributions and characteristics of wind velocity,potential temperature and specific humidity over North Tibet Plateau during summer were analyzed.It is found that the zonal wind components(meridional wind components) and the shears are smaller(greater) in clear day than those in cloudy day in August.The prevailing wind direction is west in Amdo and east in Naqu.Besides,the depths of SBL and the height of CBL are higher in clear day than in cloudy day.The specific humidity of the night is greater than that of the daytime,and also the specific humidity of the cloudy day is greater than that of the clear day.There are humidity inversion phenomena over the Tibet Plateau.The strong humidity inversion phenomena appear in night or noon. |
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| Keywords: | North Tibet Plateau wind velocity potential temperature specific humidity |
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