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| 沙漠地区沙尘天气近地层湍流输送特征分析 | |
| 引用本文： | 孙继明,肖稳安,牛生杰,杨有林,黄顺祥.沙漠地区沙尘天气近地层湍流输送特征分析[J].南京气象学院学报,2002,25(4):489-495. |
| 作者姓名： | 孙继明 肖稳安 牛生杰 杨有林 黄顺祥 |
| 作者单位： | 1. 南京气象学院,电子工程系,江苏,南京,210044 2. 宁夏气象科学研究所,宁夏,银川,750002 3. 中国人民解放军防化指挥工程学院,北京,102205 |
| 基金项目： | 国家自然科学基金项目 495 6 5 0 10 |
| 摘 要： | 利用1996－04－20－50－10在内蒙古自治区吉兰泰气象站以及1997－04－05－27在内蒙古自治区阿拉善右旗气象站观测到的风，温，湿廓线资料，应用空气动力学方法，计算了每天各观测时次的流动量通量，湍流感热通量和湍流潜热通量，并且比较分析了荒漠下垫面不同沙尘天气状况下的湍流动量通量，感热通量和潜热通量的日变化。结果表明，在沙漠地区春季无降水天气状况下，晴空条件下，白天热力湍流基于动力湍流，在近地层最重要的物质交换是湍流感热交换，浮尘天气条件下，近地层湍流输送较晴空天气条件下弱；扬沙天气条件下，近地层湍流感热交换和湍流动力量流感热通量的峰值大于交换，并且湍流动量通量的峰值较晴空峰值大将近一个量级，湍流感热通量的峰值大于浮尘天气峰值，但小于晴空条件下峰值，沙尘暴天气条件下，湍流动量通量和感热通量一样都是最重要的湍流交换，湍流交换强于扬沙天气，强的感热对沙漠地局地性沙尘暴的产生和加强起着重要作用。 |
| 关 键 词： | 沙漠地区 沙尘天气 近地面层 湍流通量 感热 |
| 文章编号： | 1000-2022(2002)04-0489-07 |
| 修稿时间： | 2001年10月8日 |
Turbulent Transfer Features of the Surface Layer over Desert Area in a Dust and Sand Weather |
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| SUN Ji-ming ,XIAO Wen-an ,NIU Sheng-jie ,YANG You-ling ,HUANG Shun-xiang.Turbulent Transfer Features of the Surface Layer over Desert Area in a Dust and Sand Weather[J].Journal of Nanjing Institute of Meteorology,2002,25(4):489-495. | |
| Authors: | SUN Ji-ming XIAO Wen-an NIU Sheng-jie YANG You-ling HUANG Shun-xiang |
| Institution: | SUN Ji-ming 1,XIAO Wen-an 1,NIU Sheng-jie 2,YANG You-ling 2,HUANG Shun-xiang 3 |
| Abstract: | With the wind,temperature and humidity profile data obtained at Jilantai station,Inner Mongolia from April 20 to May 10 in 1996 and at Alashan Youqi station,Inner Mongolia from April 5 to May 27 in 1997,the momentum,sensible and latent heat fluxes have been calculated by an aerodynamic method.Furthermore,the diurnal variations of the fluxes in different dust and sand weather conditions over the desert area have been analysed.The results suggest that the diurnal thermal turbulence is stronger than the dynamic turbulence in the surface layer and the most important material exchange is sensible heat turbulent exchange in a clear sky; in a dust and sand floating weather,the turbulent transfer is weaker than that in a clear sky;in a dust and sand blowing weather,the turbulent exchange of momentum is as same important as that of sensible heat,and the peak value of turbulent momentum flux is about one order greater than that in a clear sky,moreover,the peak value of turbulent sensible heat flux is greater than that in a dust and sand floating weather,but smaller than that in a clear sky; as for sandstorm weather,the turbulent exchange of momentum is as same important as that of sensible heat,and the turbulent exchanges are greater than those in a dust and sand blowing weather,as a result,the strong sensible heat takes an important role in the generating and strengthening of sandstorms. |
| Keywords: | surface layer dust/sand weather turbulent transfer |
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