【作者】 姚德良； 张强； 谢正桐；

【Author】 Yao De-Liang Zhang Qiang Xie Zheng-tong (Institute of Mechanics,CAS, Beijing 100080, China)

【机构】 中国科学院力学研究所；

【摘要】 本文论述了陆气相互作用的研究意义与现状。在原有研究工作基础上,针对海北高寒草甸地区陆气水热传输过程,提出了一个多层陆气耦合模式。对植被内部湍流交换的物理过程作了深入研究,特别考虑了叶片气孔为非饱和水汽条件下的交换情况,并且给出了修正后的根系吸水模式。陆气耦合模式分别对大气、植被、土壤作多层划分,以助于细致了解沿高度分布的各物理量。利用本模式对中国科学院海北高寒草甸生态试验站地区矮嵩草草甸陆气水热交换过程进行了数值模拟,模拟结果与实测值吻合较好。证明该模式成功地模拟了陆气相互作用过程,可为当地合理利用水热资源提供科学依据。更多还原

【Abstract】 In this paper, the importance of investigation on land-atmosphere interaction as well as its present state of the art is elucidated. Based on the previous work and focusing on the water-heat transfer process between land and atmosphere in Habei high-cold meadow area, a multi-layer land-atmosphere interaction coupling model is presented. With special attention paid to the moisture transfer in leaf stomatal under unsaturated condition, a profound investigation is made on the physical process of the turbulent transfer inside the vegetation. A revised water-absorption model for root system is presented. The multi-layer coupling model, dividing atmosphere, vegetation and soil into multi-layers, facilitates the study of vertically distributed physical variables in detail. Numerical simulation is conducted according to the transfer process of Kinesia humility meadow in the area of Habei High-Cold Meadow Ecosystem Station, CAS. The numerical results agree well with experimental data. The model is proved to successfully simulate the land-atmosphere interaction process and can provide scientific basis for the optimized use of local water-heat resources.更多还原