Collaborative Research: A Three-Dimensional and Time Dependent Study of the Katabatic Winds at Terra Nova Bay

9218544 Parish这个项目是对南极表面和边界层风场成功调查的一年延续，特别强调了特拉诺瓦湾附近的极强的下坡倾斜风。向外流动的地面空气是经向环流的组成部分，与高空的流入和辐合以及大陆上空的下沉运动一起。倾斜冰盖上的斜降风模式非常不规则，空气汇聚到几个狭窄的沿海地区，在当地产生了被认为是世界上最强、最持久的地面风。已知的例子是阿德利地的丹尼森角和马丁港（面向澳大利亚），以及罗斯海西海岸的特拉诺瓦湾。作为该项目的一部分，需要承担的具体任务是完成特定跳伞事件的运动学、动力学和气候学分析。在1988年至1991年期间，将审查特拉诺瓦湾附近自动气象站的观测资料、麦克默多站收集的卫星图像和澳大利亚气象局的天气分析，以确定与特拉诺瓦湾降风状况变化有关的大尺度条件。＊＊＊

9218544 Parish This project is a one-year 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. Automatic weather station observations from the vicinity of Terra Nova Bay, satellite imagery collected at McMurdo Station, and synoptic weather analyses from the Australian Bureau of Meteorology will be examined for the period of 1988 to 1991 to determine the broadscale conditions associated with variations in the katabatic wind regime at Terra Nova Bay. ***