Contribution of Western Antarctic Peninsula glaciers to sea level rise: Separation of the dynamic and climatic components

1043649/布劳恩该奖项支持一个项目，以确定西南极半岛（WAP）和邻近岛屿，包括国王乔治岛和利文斯顿岛的选定冰川目前的质量平衡。一个主要的目标是区分当前质量预算的气候和动力组成部分。动态部分将使用通量门方法进行评估。将通过对重复SAR卫星图像的偏移跟踪来获得冰川速度场，并将通过基于质量连续性的新方法来近似计算接地线或终点附近的冰厚度。地表物质平衡将根据区域气候模型的温度和降水数据所强迫的空间分布的温度指数物质平衡模型计算。我们的研究结果将提供更好的质量预算估计南极西部半岛冰川和气候和动力成分之间的比例更透彻的理解。将开发的技术将适用于该地区的其他冰川，从而可以得出区域规模的质量预算。这项工作的更广泛影响是，冰川损耗目前是全球海平面上升的最重要因素，南极半岛已被确定为最大的单一因素之一。未来的海平面上升具有重大的社会、经济和生态影响。该活动将通过与欧洲和南美同事的合作促进新的伙伴关系。该项目将成为博士后研究奖学金的基础。它还将通过将数据和结果纳入课程大纲，为本科生和研究生提供培训。

1043649/BraunThis award supports a project to determine the current mass balance of selected glaciers of the Western Antarctic Peninsula (WAP) and adjacent islands, including King George Island and Livingston Island. A major goal is to discriminate the climatic and dynamic components of the current mass budget. The dynamic component will be assessed using a flux gate approach. Glacier velocity fields will be derived by offset tracking on repeat SAR satellite imagery, and ice thicknesses across grounding lines or near terminus will be approximated from a new methods based on mass continuity. The surface mass balance will be computed from a spatially distributed temperature-index mass-balance model forced by temperature and precipitation data from regional climate models. Our results will provide improved mass budget estimates of Western Antarctic Peninsula glaciers and a more thorough understanding of the ratio between the climatic and dynamic components. The techniques to be developed will be applicable to other glaciers in the region allowing regional scale mass budgets to be derived. The broader impacts of this work are that glacier wastage is currently the most important contributor to global sea level rise and the Antarctic Peninsula has been identified as one of the largest single contributors. Future sea-level rise has major societal, economic and ecological implications. The activity will foster new partnerships through collaboration with European and South American colleagues. The project will form the base of of a postdoctoral research fellowship. It will also provide training of undergraduate and graduate students through inclusion of data and results in course curriculums.