In this paper,turbulent flux over canopy of field crops was calculated using Profile Gradient Method derived from Monin Obhov Similarity Theory and drag coefficient,Stanton number and Dalton number were also further defined.

• 根据农田植被层上方的温湿风梯度观测资料，采用基于莫宁－奥布霍夫相似理论的廓线梯度法计算了农田植被层上方的湍流通量，进而确定出拖曳系数、斯坦顿数和道尔顿数。