非均匀下垫面大气边界层研究进展

Review of researches on atmospheric boundary layer over heterogeneous underlying surface

总结了水平非均匀下垫面的大气边界层研究,指出干旱区的绿洲具有明显的"冷湿岛效应",并可形成边缘逆湿和区域环流,而植被和水域的分布则显著改变了大气边界层结构.阐述了复杂地形下垫面对局地风场和小尺度环流产生的影响、城市热岛效应的产生及特点和城市中绿地和水体的微气候效应.比较分析了不同陆面参数化方案以及边界层气候模式,提出未来在热力与动力非均匀的结合、湿地下垫面的数值模拟、城市复杂下垫面参数化以及气候模式的耦合等方面尚需进行深入的研究.

Based on various documentary materials, the paper summarizes the progress in research on the level atmospheric boundary layer（ABL） over non-uniform underlying surface. It points out that oasis shows obvious ＂cold- humid island effect＂ in arid area, leading to humidity inversion in the boundary region as well as regional oasis-Gobi circulation. The distribution of vegetation and water significantly changes the structure of ABL and greatly influences local climate. Besides, the underlying surface with complex terrain would affect local winds and small-scale circula- tions. Meanwhile, the occurrence and characteristics of ＂heat island effect＂, and the modification of microclimate by greenbelt and water in urban areas are also discussed in detail. Moreover, different planetary boundary layer（PBL） parameterization and land-surface models（LSM） are also described and compared in this paper. In the end, it pres- ents the points deserving further investigation, including combination of thermal heterogeneity and dynamical heterogeneity, numerical simulation of wetland underlying surface, land surface parameterization of complex urban underlying surface, integration of climate models and other numerical schemes.