长白山阔叶红松林林冠大气界面湍流主导时间尺度特征 |
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| 出 版 社：林业研究（英文版） |
| 发表时间：2002，13(3):205~208 |
| 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，韩士杰，邹春静，周玉梅 |
| 点 击 率：10633 |
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| 关 键 字：冠层-大气界面,多尺度,大气稳定度,主导时间尺度 |
摘 要：使用多尺度分析方法分析了长白山阔叶红松林林冠大气界面湍流交换的主导时间尺度特征及相应的的作用系数特征及大气层结和林冠结构的的影响。:发现：水平风速的DTS大于垂直风速的相应值，垂直风速的DCR大于水平风速的DCR。大气层结影响是非线性的。不稳定层结条件下的DTS和DCR大于稳定条件下，在强稳定层结和强不稳定层结条件下，DTS和DCR主要取决于来流特征。生长季节各高度DTS的变化规律较为复杂且不一致，非生长季节各高度变化具有一致的变化。不稳定层结条件下的生长季节水平风速DTS大于非生长季节；林冠结构可以显著影响主导过程贡献率。
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关 键 字(英文)：Canopy-atmosphere interface, Multi-scale, Atmospheric stability, Dominate time scale
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摘 要(英文)：The measurement and observation for this study were carried out at Forest System Opened Research Station of Changbai Mountains. Characteristics of Dominate time scales(DTSes) and dominate time scales contribution ratios(DCRs) across canopy-atmosphere interface and controlling factors were analyzed with multi-scale method. DTS of stream wise and lateral velocity components were larger than that of vertical velocity components. Effect of atmospheric stability on DCR and DTC was nonlinear. DTC under unstable conditions was larger than under stable conditions; DTC and DCR across canopy-atmosphere interface remarkably.
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