A Study of the Large-Scale Impacts of Antarctic Katabatic Winds

该项目是一个大气模拟工作，其目的是 环极区同时演化的研究 涡旋和垂直下降风场。 下降风 经常发生在南极大气层的最低层 并形成一个赤道方向的分支的平均环流， 南半球高纬度地区 它们传递能量和动量 向北，从而减轻了一些强烈的斜压性 沿着南极洲的边缘 因为水平方向的温度差异。 边界层 流动似乎有一个显着的影响，迫使大规模 南极上空对流层中上层的运动。 的 这项研究的基本目标是评估浅层排水 这些特征影响着南极洲的热量和动量收支 中尺度模式与统计模式相结合 常规站和自动站地面分析 意见。 该研究将补充当前的研究 南半球高纬度地区的大气环流， 平流层平流涡旋

This project is an atmospheric modelling effort whose purpose is the examination of the concurrent evolution of the circumpolar vortex and the antarctic katabatic wind regime. Katabatic winds occur regularly in the lowest levels of the antarctic atmosphere and form an equatorward-directed branch of the mean circulation in high southern latitudes. They transport energy and momentum northward, thereby alleviating some of the intense baroclinicity that develops along the periphery of the antarctic continent because of the horizontal temperature contrast. Boundary layer flows appear to have a significant effect in forcing large-scale motions in the middle and upper troposphere over Antarctica. The fundamental goal of this research is to assess how shallow drainage features affect the heat and momentum budgets of the Antarctic atmosphere by integrating mesoscale modelling with statistical analyses of conventional and automatic weather station surface observations. The study will complement current studies of the general circulation in high southern latitudes, and of the antarctic stratospheric vortex.