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| 三峡坛子岭单点地面矢量风分析 | |
| 引用本文： | 沈铁元,陈少平,陈正洪,杨维军,毛以伟. 三峡坛子岭单点地面矢量风分析[J]. 气象, 2003, 29(3): 12-16 |
| 作者姓名： | 沈铁元 陈少平 陈正洪 杨维军 毛以伟 |
| 作者单位： | 1. 中国气象局武汉暴雨研究所,武汉,430074;南京大学大气科学系 2. 宜昌市气象局;南京大学大气科学系 3. 武汉城市环境工程技术中心 4. 湖北省气象局 5. 宜昌市气象局 |
| 基金项目： | 中国长江三峡工程开发总公司“长江三峡工程坝区大气扩散规律分析”项目的资助 |
| 摘 要： | 利用UVW三轴风速仪三峡坛子岭单点地面风观测资料分析了三峡坝区地面风速量值、风向风速出现频率分布、风的日变化规律等，并根据这些观测资料、结合一些地形风理论知识和观测现象推测了三峡坛子岭附近地面风平面流场特征，从而揭示了河道地形回流风这一特殊小地形下的局地风现象。三峡坛子岭附近地面的这种回流风尺度在百米到千米量级，与由于地形热力因子引起的山地风不同，是由于小地形的动力作用引起的，其风向与长江河道引导的山地风相反。 |
| 关 键 词： | 地面矢量风 河道 地形回流风 风速 风向 动力作用 |
Analysis of Wind Vector above Tanziling Mountain of Three Gorges |
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| Shen Tieyuan , Chen Shaoping , Chen Zhenghong Yang Weijun Mao Yiwei. Analysis of Wind Vector above Tanziling Mountain of Three Gorges[J]. Meteorological Monthly, 2003, 29(3): 12-16 | |
| Authors: | Shen Tieyuan Chen Shaoping Chen Zhenghong Yang Weijun Mao Yiwei |
| Affiliation: | Shen Tieyuan 1,5 Chen Shaoping 2,5 Chen Zhenghong 3 Yang Weijun 4 Mao Yiwei 2 |
| Abstract: | Based on observations of wind vector above Tanziling mountain of Three Gorges with a three dimensions anemocinemograph, the wind velocity, frequencies of velocity and direction and the daily variation in the areas are analyzed. Combining with the theories of orographic wind and some natural phenomenon,the horizontal characteristics of air flowing filed are given, so the riverway returning breeze is found. It emerged in a river channel around the basic flow if there is a special topographic form. This returning breeze in the areas has a hundred to thousand meter scale. It is different from mountain valley wind directed by Changjiang riverway that it is caused by orographic dynamical factor not by thermodynamical factor and has opposite direction. |
| Keywords: | Tanziling of Three Gorges surface wind vector riverway(river channel) returning breeze(backflow) |
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