Land-Atmosphere-Ice and Snow Interactions in the High Arctic: the Hazen Plateau, Ellesmore Island

该项目将在加拿大埃尔斯米尔岛北极高地的冰川上进行，向下延伸到大约相当于平均雪线的海拔。这种关系使这座冰川对气候变化非常敏感，对冰川的开始或消退至关重要。在这种情况下，即使是微小的变暖也会影响冰川接地线的位置。因此，这项研究将能够确定在预测的全球变化情景下冰川开始大范围消退所必需的关键条件。该项目涉及一项广泛的实地方案和利用埃尔斯米尔岛上现有的气候站，以确定重要的气候变量和推动冰川消退和前进的空气-陆地-冰系统的反馈。该项目可以确定气候-冰川系统的动态，并可能检测到冰川对观测到的北极变暖的持续反应。

ABSTRACTOPP-9819362BRADLEY, RAYMONDUNIVERSITY OF MASSACHUSETTSThis project will be conducted on a glacier on an arctic upland on Ellesmere Island, Canada that extends down to an elevation approximately equivalent to the elevation of the average snow line. That relationship makes this glacier very sensitive to climate change and critical to the onset or retreat of the glacier. Even a small warming would affect the position of the grounding line of the glacier under these conditions. Therefore this study will be able to identify the critical conditions necessary for the onset of widespread retreat of glaciers under predicted global change scenarios. The project involves an extensive field program and utilization of existing climate stations on Ellesmere Island to determine the important climate variables and feedbacks of the air-land-ice system that drives glacial retreat and advance. This project could determine both the dynamics of the climate-glacier system and possibly detect ongoing glacial response to observed arctic warming.