The Impact of Different Terrain Configurations on the Formation and Dynamics of Katabatic Flows: Idealised Case Studies
The Impact of Different Terrain Configurations on the Formation and Dynamics of Katabatic Flows: Idealised Case Studies
复制标题
不同地形配置对下降流的形成和动力学的影响：理想化案例研究
DOI：
10.1007/s10546-009-9445-8
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发表时间：
2010
影响因子：
4.3
通讯作者：
J. Bendix
中科院分区：
文献类型：
--
作者：
K. Trachte;T. Nauss;J. Bendix
在数值模式研究中，研究了不同地形形状对理想化katabatic流一般行为的影响。各种简化的地形模式被用来揭示由于预先定义的地形结构而导致的夜间冷排空气动力学的改变。生成的理想化地形模型涵盖了厄瓜多尔南部和秘鲁北部的热带东安第斯山脉地区以及邻近的亚马逊地区的所有主要地形要素。理想化的模拟证实：(I)在地形要素(坡度和山谷)上发展的非绝热水流，(Ii)低地盆地中的非绝热水流发生汇流，以及(Iii)直接进入这种盆地的复杂的排水系统可以维持汇流，尽管坡度和坡距不同。
Impacts of different terrain configurations on the general behaviour of idealised katabatic flows are investigated in a numerical model study. Various simplified terrain models are applied to unveil modifications of the dynamics of nocturnal cold drainage of air as a result of predefined topographical structures. The generated idealised terrain models encompass all major topographical elements of an area in the tropical eastern Andes of southern Ecuador and northern Peru, and the adjacent Amazon. The idealised simulations corroborate that (i) katabatic flows develop over topographical elements (slopes and valleys), that (ii) confluence of katabatic flows in a lowland basin with a concave terrainline occur, and (iii) a complex drainage flow system regime directed into such a basin can sustain the confluence despite varying slope angles and slope distances.