Continued Investigation of the Extraordinary Katabatic Windsat Terra Nova

这个项目是一个成功的调查的延续， 无风地面和边界层风场， 特别强调了极强的下坡下降风 泰拉诺瓦湾附近 向外流动的地表空气是 与入流一起， 和收敛高空，并普遍下沉运动， 大陆 在倾斜的冰盖上的下降风的模式是 高度不规则，空气汇聚成几个狭窄的沿海地区， 在当地生产被认为是最强的 也是世界上最持久的地表风 已知示例 位于阿德利地的丹尼森角和马丁港（面向 澳大利亚），以及罗斯海峡西岸的特拉诺瓦湾（Terra Nova Bay） 海 作为该项目一部分的具体任务是： 完成以下活动的运动学、动力学和气候学分析： 具体的下降事件，以整合高分辨率卫星 图像到具体的案例研究，并进行广泛的 不同空间尺度的数值模拟。 现有阵列 自动气象站提供了原始数据集， 在这项研究中，它被卫星图像所扩展， 这将被用来调查离岸传播的 下降气流 建模工作正在扩展到 使用40公里网格间距的全大陆模拟 为了探索海岸汇流对气候的影响 区域动力学

This project is a continuation of a successful investigation into the antarctic surface and boundary layer wind field, with specific emphasis on the extremely strong down-slope katabatic winds in the vicinity of Terra Nova Bay. The outward flowing surface air is an integral part of the meridional circulation, together with inflow and convergence aloft, and generally sinking motion over the continent. The pattern of katabatic winds over the sloping ice sheet is highly irregular, with air converging into several narrow coastal regions to produce locally what are recognized as the strongest and most persistent surface winds in the world. Known examples are at Cape Denison and Port Martin in Adelie Land (facing Australia), and in Terra Nova Bay on the western coast of the Ross Sea. Specific tasks to be undertaken as part of this project are to complete the kinematic, dynamic, and climatological analysis of specific katabatic events, to integrate high resolution satellite imagery into specific case studies, and to carry out extensive numerical modeling at various spatial scales. An existing array of automatic weather stations has provided the primary data set for this study; it is being extended by the satellite imagery which will be used to investigate the offshore propagation of the katabatic air stream. The modeling effort is being extended to continent-wide simulations using a grid spacing of 40 kilometers in order to explore the climatic impacts of the coastal confluence zone dynamics.