森林冠层边界层湍流传输的观测和数值模拟

刘和平,桑建国,刘树华 已出版文章查询
刘和平,桑建国,刘树华
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1北京大学地球物理系!北京,100871,北京大学地球物理系!北京,100871,北京大学地球物理系!北京,100871


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文中分析和模拟了森林冠层上下动量、热量和水汽传输的特征。结果表明冠层对动量的吸收十分明显,非局地扩散通量在冠层上下的动量传输中起着很大的作用白天在冠层下层结稳定,但冠层下观测的感热通量向上传输夜晚冠层下层结不稳定,但冠层下观测的感热通量向下传输,白天和晚上都出现了热量的反梯度传输现象,从而证明在热量输送中,非局地扩散通量不可忽视。同时对冠层上下的水汽交换特征的分析表明非局地扩散通量是冠层内水汽向冠层上传输的主要机制。

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语种: 中文   

基金国家自然科学基金!49575251

关键词森林冠层 动量、热量和水汽传输 非局地湍流扩散 数值模拟


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