中文摘要：

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.

英文摘要：

Based on the continuous observations on the land-atmosphere flux exchange and the meteorological and biological elements in a maize field at the Jinzhou Agricultural Ecosystem Research Station in Liaoning Province of Northeast China from 2006 to 2008, and by using the dynamic roughness （z0） and zero-displacement （d） parameterization scheme considering the effects of leaf area index, canopy height and wind speed at different developmental stages of maize, the BATS1e model was modified, and applied to investigate the effects of dynamic aerodynamic parameters on the flux exchange between maize agroecosystem and atmosphere. Compared with the original model, the drag coefficient （CD） simulated by the modified model increased, and its diurnal variation was more obvious with increasing vegetation coverage, which was more accordant with practical circumstances. The simulation accuracies of sensible heat （H）, latent heat （λE） and soil heat flux were improved in varying degree, and the Nash-Sutcliffes （NSs） were increased by 0.0569, 0.0194 and 0.0384, with the improvement quantities in the growth season being 0.9%, 1.1% and 1.2% of global radiation, respectively. The dynamic parameterizations of z0 and d played a more remarkable role to increase the simulation accuracies of H and λE with the actual observation of soil water content introduced into the improved model. This research proved that more reasonable dynamic aerodynamic parameterizations could fulfill an obvious function to improve the land surface processes simulation.