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基于2006—2008年锦州玉米农田生态系统的通量、气象及生物因子连续观测,利用所建立的考虑玉米不同发育期叶面积指数、冠层高度和风速的地表粗糙度(z0)和零平面位移(d)动态参数化方案对BATS1e陆面模型进行改进,研究空气动力学参数变化对玉米田陆-气通量模拟的影响.结果表明:改进后的拖曳系数(CD)随植被覆盖度增大而增大,更符合实际;感热、潜热和土壤热通量的模拟精度均有不同程度改进,效率系数分别提高0.0569、0.0194和0.0384,生长季累计改进量分别占总辐射的0.9%、1.1%和1.2%;当输入真实的表层土壤湿度后,z0和d动态参数化对感热和潜热的改进作用更大.合理的动态空气动力学参数化方案对陆面过程模拟具有明显改善作用.
Based on the continuous observation of the fluxes, meteorological and biological factors of maize agroecosystems in Jinzhou from 2006 to 2008, the surface roughness (z0) and the zero plane displacements (d) Dynamic parameterization scheme The BATS1e land surface model was modified to study the effects of aerodynamic parameters on the land-atmosphere flux simulation in maize field.The results show that the improved drag coefficient (CD) increases with vegetation coverage While the simulation results show that the sensible heat, latent heat and soil heat flux have different degrees of improvement. The efficiency coefficient increases by 0.0569, 0.0194 and 0.0384, respectively. The cumulative improvement in growth season accounts for 0.9% and 1.1 % And 1.2%, respectively.When inputting the real surface soil moisture, dynamic parameterization of z0 and d can greatly improve the sensible heat and latent heat.A reasonable dynamic aerodynamic parameterization scheme can significantly improve the land surface process simulation.