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研究报告目录 |
长白山阔叶红松林林地附近湍流特征分析 |
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| 出 版 社：林业研究（英文版） |
| 发表时间：2002，13(2):119~122 |
| 台 站：
长白山森林生态系统定位研究站
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| 作 者：张军辉，丁之慧，韩士杰，邹春静，周玉梅 |
| 点 击 率：10959 |
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关 键 字：林地,风速统计量,大气稳定度,对流状态
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摘 要：2001年8月使用三维超声风温仪（IAP-SA 485）测定并分析了中国科学院长白山森林生态系统开放站阔叶红松林样地林地附近湍流特征。发现林地附近气流具有高度间歇性和不对称性，并为活跃的运动方向主导。垂直方向的湍流受到抑制，其时间尺度和长度尺度都小于水平两个分量的相应值，林地附近的气团呈偏平结构。热力作用对当地湍流产生和维持过程中起了主导作用。
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关 键 字(英文)：Forest floor, Velocity statistics, Atmospheric stability, Convection state
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摘 要(英文)：The measurement and observation for this study were carried out by using a three-dimensional Sonic anemometer( IAP-SA 485), at Forest System Opened Research Station of Changbai Mountains in August 2001. The basic characteristics of turbulence, such as turbulence intensity, atmospheric stability, time scales and convention state, near the forest floor were analyzed. It is concluded that the airflow near forest floor is characterized by high intermittence and asymmetry, and the active and upward movement takes the leading position. Near forest floor, the vertical turbulence is retained and its time scale and length scale are much less than that of u, v components. The eddy near forest floor shows a flat structure and look like a “Disk”. Buoyancy plays a leading role in the generation and maintenance of local turbulence.
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