| 大理近地层山谷盆地湖陆风及湍流特征分析 |
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| 引用本文： | 杨智,刘劲松,孙绩华.大理近地层山谷盆地湖陆风及湍流特征分析[J].气象与环境学报,2008,24(5):32-37. |
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| 作者姓名： | 杨智 刘劲松 孙绩华 |
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| 作者单位： | 大理国家气候观象台 |
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| 基金项目： | 云南省气象局资助项目，云南省气象局短平快项目 |
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| 摘 要： | 研究湖陆风特征不仅能够为提高天气气候的预测能力奠定基础，而且对风能资源的开发利用等具有重要的实用意义。利用大理国家气候观象台近地面通量观测系统的2007年3月－2008年5月资料，采用涡动相关法等分析了大理近地层中湖陆风、峡谷风特征及形成原因和影响因素。结果表明：大理地区白天以东风和东南风为主，夜间以西风和西南风为主。进一步对湍流和湍流通量特征分析发现，大理地区白天不稳定层结多于夜间；湍流强度白天强于夜间，并且随着风速的增大而减小；湍流通量具有明显的日变化特征，热量交换形式以潜热为主。
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| 关 键 词： | 大理 近地层 山谷盆地 湖陆风特征 涡动相关法 |
| 收稿时间： | 2008-5-23 |
| 修稿时间： | 2008-6-23 |
Characteristics of lake-land breeze and turbulence in the surface layer of valley and basin in Dali, Yunnan province |
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| YANG Zhi,LIU Jin-song,SUN Ji-hua.Characteristics of lake-land breeze and turbulence in the surface layer of valley and basin in Dali, Yunnan province[J].Journal of Meteorology and Environment,2008,24(5):32-37. |
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| Authors: | YANG Zhi LIU Jin-song SUN Ji-hua |
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| Institution: | Dali National Climatic Observatory |
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| Abstract: | The analysis of lake-land breeze not only improves the forecast abilities of weather and climate,but also is significant to the development and utilization of wind energy resources.Based on the flux data from March 2007 to May 2008 in the national climatic observatory of Dali,the characteristics of lake-land breeze and gorge wind and their forming reasons as well as their controlling factors were analyzed by eddy correlation method.The results indicate that the prevailing winds are the east and southeast winds in the day,so are the west and southwest winds at night.According to the characteristics of turbulence and turbulent flux,it found that the frequency of unstable stratification in the day is higher than that at night.Turbulence intensity in the day is larger than that at night,and it decreases with the increase of wind speed.The diurnal variations of turbulent fluxes are obvious.And the latent heat fluxes are dominant in the energy exchange in Dali. |
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| Keywords: | Dali Surface layer Valley and basin Lake-land breeze characteristics Eddy correlation |
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