报告题目：Turbulence in land-atmosphere coupling

　　报 告 人：Prof. Dan LI

　　单 位：Department of Earth and Environment, Boston University

　　时 间：2017年7月3日上午10:00-11:30

　　地 点：大气所40号楼319会议室

　　The importance of surface-atmosphere interaction (e.g., land-atmosphere interaction and air-sea interaction) is rarely disputed. However, our understanding of these interacting processes remains to be advanced. In this presentation, I will talk about surface-atmosphere interaction from the perspective of fluid mechanics. In particular, I will focus on two important concepts: the Monin-Obukhov similarity theory and the roughness length, which are the foundation for nearly all parameterizations of surface-atmosphere interaction in numerical models. The universality of Monin-Obukhov similarity functions and the scaling of thermal roughness length with respect to the Reynolds number will be discussed.