International Symposium: Reconciling Observations and Models of Elastic and Viscoelastic Deformation due to Ice Mass Change

该项目要求资助美国科学家（主要是研究生、博士后和初级教师）参加在格陵兰岛伊卢利萨特（丹麦）举行的“冰质量变化引起的弹性和粘弹性变形观测和模型的协调”国际研讨会。这次会议将为美国科学家提供一个机会，让他们与来自世界各地的同事互动，共同开发冰川均衡调整（GIA）模型。确定变暖气候下地球冰冻圈的质量平衡趋势和波动是地球和环境科学界非常感兴趣的课题。由于过去质量变化的长期影响，目前对冰冻圈变化的测量并不能唯一地限制当前的质量平衡。GIA是由冰川和冰盖下岩石的弹性和粘弹性共同作用引起的。开发这些GIA模型需要考虑质量载荷历史和地球的物理特性，通过各种时间尺度的数值模拟整合冰川学、大地测量学和地震学，从几十年到几百年到几千年的弹性响应到粘弹性响应。这些研究结果对于理解地震后的形变和协调冰冻圈和海平面对气候变化的响应具有重要意义。这一提议将支持美国科学家，特别是早期职业科学家参加一个有重点的国际会议。他们将有机会展示他们的工作，并与相关领域的全球专家进行互动。他们还将在世界上移动最快的冰川之一雅各布港冰川的实地考察中获得第一手的冰川经验。这次会议的主题对许多领域都很重要，例如估算当今冰冻圈对气候变化的反应，以及为海平面上升和气候变化的其他影响制定适当的预算。

The PI requests funds for travel support for US based scientists, mostly graduate students, postdocs, and junior falculties to attend the International Symposium: Reconciling Observations and Models of Elastic and Viscoelastic Deformation due to Ice Mass Change, to be held in Ilulissat, Greenland (Denmark). This conference will provide an opportunity for US-based scientists to interact with colleagues from around the world to develop Glacial Isostatic Adjustment (GIA) models. Determining the mass balance trend and fluctuations of the Earth's cryosphere in a warming climate is a topic of great interest in the Earth and environmental sciences communities. Present day measurements of changes in the cryosphere do not uniquely constrain the present-day mass balance, because of the long-lasting effects of past mass changes - GIA. GIA is caused by the combined elastic and viscoelastic responses of rock beneath glaciers and ice sheets. Developing these GIA models requires accounting for the mass load history and the physical properties of the earth, integrating glaciology, geodesy and seismology through numerical modeling over a variety of timescales, from the elastic response to the viscoelastic response over decades to centuries to millennia. Results from theses studies are needed for understanding postseismic deformation after earthquakes and reconciling the response of the cryosphere and sea level to climate change. This proposal will support the participation of US-based scientists, especially early career scientists, in a focused international conference. They will have the opportunity to present their work and interact with global experts in their related fields. They will also gain first hand experience of glaciation during a field trip to Jakobshavn Isbrae, one of the fastest moving glaciers in the world. The topic of the conference is important for a wide range of fields, such as deriving estimates of the present-day response of the cryosphere to climate change, and developing a proper budget for sea level rise and other impacts of a changing climate.