A Study of the Katabatic Wind Confluence Zone Near Siple Coast, West Antarctica

9417983 THIQ计划是一项研究南极东部西普尔海岸内陆的瞬变天气系统与地表热风系统的动力相互作用的项目。西伯利亚海岸的地形将来自内陆的冷空气引导成强烈而持久的卡塔式气流，这些气流流经罗斯冰架。天气尺度气旋风暴的周期性经过通过加强地面气流而影响地面风流的结构和行为，使地面气流成为涌浪事件，在罗斯冰架上延伸多达1000英里，而赤道风可能通过在冰架上形成一个强烈斜压区来影响气旋风暴的产生。该项目将把九个自动气象站网络的观测、多光谱卫星图像和数值模拟结合起来，目的是测试和阐述从先前对卡塔尔风动力学的调查中建立的假设。需要讨论的具体方面包括南极西部和东部的赤道气流的相对重要性，气压梯度和云辐射强迫的影响的评估，以及赤道流场与中尺度气旋的相互作用。***

9417983 Thiq project is a study of the dynamic interaction of transient weather systems with the surface katabatic wind system inland from the Siple Coast in East Antarctica. The topography of the Siple Coast channels the cold air from the interior into intense and persistent streams of katabatic winds which flow out over the Ross Ice Shelf. The periodic passage of synoptic-scale cyclonic storms affects the structure and behavior of the surface wind streams by reinforcing the surface flow into surge events, extending for as much as a thousand miles across the Ross Ice Shelf, and the katabatic winds may affect the generation of cyclonic storms by forming a strongly baroclinic zone on the Ice Shelf. This project will integrate observations from a network of nine automatic weather stations, multi-spectral satellite imagery, and numerical modeling with the goal of testing and elaborating upon hypotheses established from prior investigations of the dynamics of katabatic winds. Specific aspects to be addressed include the relative importance of katabatic flows in West and East Antarctica, evaluation of the impacts of pressure gradient and cloud- radiative forcing, and the interaction of the katabatic flow field with mesoscale cyclones. ***