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

南极洲西部Siple海岸附近下降风汇合区的研究

• 批准号: 9417983
• 负责人: David Bromwich
• 金额: $ 18.03万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1998-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417983&HistoricalAwards=false
• 关键词: Study; Katabatic; Wind; Confluence; Zone

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. ***

9417983 Thiq 项目是一项瞬态天气系统与东南极洲 Siple 海岸内陆地面下降风系统动态相互作用的研究。 西普尔海岸的地形将冷空气从内部引导成强烈而持久的下降风流，从罗斯冰架上流出。 天气规模气旋风暴的周期性通过，通过增强地表气流形成涌动事件，影响地表风流的结构和行为，在罗斯冰架上延伸长达一千英里，而下降风可能通过在冰架上形成强烈的斜压区来影响气旋风暴的产生。 该项目将整合来自九个自动气象站网络的观测、多光谱卫星图像和数值建模，目的是测试和阐述先前对下降风动力学研究所建立的假设。 需要讨论的具体方面包括南极洲西部和东部下降流的相对重要性、压力梯度和云辐射强迫影响的评估以及下降流场与中尺度气旋的相互作用。 ***