复杂地形上空大气边界层结构的理想数值模拟研究

项目名称： 复杂地形上空大气边界层结构的理想数值模拟研究

项目编号： No.41205007

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 大气科学学科

项目作者： 王婵

作者单位： 中国科学院寒区旱区环境与工程研究所

项目金额： 25万元

中文摘要： 与地形有关的各种物理过程对边界层中流场的分布及动量、物质的通量输送有着不可忽视的作用。因此，研究地形有关的过程，特别是地形强迫抬升对边界层中风场和温度场结构的调整，及其对大气边界层的各种物理过程发展和演变的进一步影响，具有重要的意义。而由于地形起伏使边界层流场结构变得极为复杂，非均匀地表性质与地形起伏在众多数值模拟研究中常被分开考虑，但实际情况往往是这两种非均匀作用的复杂组合。为了进一步了解地形起伏和地表植被造成的非均一性对边界层结构的影响，本项目利用高分辨率的边界层模式BLASIUS，考虑辐射过程和陆面过程，结合地表植被分布非均匀性和地形非均匀性，分析复杂地形上空的边界层结构特征，深入探讨地形起伏和太阳辐射日变化引起的山区阴坡阳坡的水热通量平衡特征，及其进一步影响山区区域环流的形成及物质和能量的输送问题。为植被退化区植被恢复的研究和山区生态环境的建设提供重要参考。

中文关键词： 复杂地形；大气边界层结构；区域环流；坡度；植被

英文摘要： Various physical process related to a terrain has significant effect on distribution of flow field and flux transportion of momentum and mass in boundary layer. Therefore, study on the process related to a terrain, especially effect of terrain forced uplift on structure adjustment of wind field and temperature field in boundary layer, and development and evolution of various physical process , has the vital significance.But, due to the terrain undulation,the flow field in the boundary layer is very complex . heterogeneity over uneven surface and orograph is often considered separately in many numerical study, but the fact is that the two heterogeneity almost influent together.In order to further understand the effect of inhomogeneity of orograph and vegetation on boundary layer structure, using high-resolution boundary layer mode BLASIUS, consideried radiation process and the land surface process, combined with vegetation distribution heterogeneity and terrain heterogeneity. We will analyze the structure characteristics of the boundary layer over the complicated terrain, further discuss balance of vapor and heat flux varying with terrain fluctuation and solar radiation change in shady slope and sunny slope,and its further influence on area circulation over the mountains,mass and energy transportion

英文关键词： complex terrain；structure of atmospheric boundary；regional circulation；gradient；vegetation