Three-dimensional Stokes grounding line dynamics with the open community JPL/UCI Ice Sheet System Model (ISSM).

EAGER基金将用于向美国和国外更广泛的学术界开放一个成熟的数值冰盖建模工具的源代码。喷气推进实验室的冰盖系统模型（ISSM）旨在作为地球冰盖表征的数值模拟工具，并能够进行大规模卫星和其他数据的同化。ISSM具有很高的空间分辨率，能够解析整个大陆（南极洲）和局部（低至~100米）冰流动力学特征，以及Stokes方程冰流预估的全分辨率。开放该模型的源代码是使其与其他地球系统建模工作相结合的一个合乎逻辑的步骤，例如旨在包括全范围冰冻圈海洋和大气过程的全球环流大气和海洋模型。EAGER提案的一个具体重点目标是开发和测试一种新的求解器，以研究松岛冰川接地线演变的三维模拟。加州大学欧文分校的这项工作将涉及加州大学欧文分校本科生和研究生的培训和使用，以及其他学术机构的科学家和学生参加计划中的ISSM研讨会。正如政府间气候变化专门委员会（IPCC AR-4）最近的报告所承认的那样，目前科学上对南极和格陵兰冰盖未来的大规模变化以及冰盖流入变暖海洋的可能加速的不确定性，仍然是对未来一个世纪全球和地方海平面上升预测不确定性的主要来源。海平面上升的不确定性，在几十年到几百年的显著快速时间尺度上，是一个具有一定社会和经济意义的问题。

EAGER funding is to be used to open, to the wider academic community in the US and abroad, the source code for a maturing numerical ice-sheet modeling tool. The JPL Ice Sheet System Model (ISSM) is intended as a numerical modeling tool for the representation of the earth's ice sheets, and to be capable of large-scale satellite and other data assimilation. ISSM has high spatial resolution capable of resolving both continent wide (Antarctica) and local (down to ~100's meters) ice flow dynamical features, along with full resolution of Stokes equation ice flow projections. Opening up the source code of the model is a logical step towards its coupling with other earth systems modeling efforts, such as global circulation atmospheric and ocean models intended to include a full range of cryosphere ocean and atmosphere processes. A specific focus goal of the EAGER proposal, is the development and testing of a new solver to study the three-dimensional simulation of the evolution of the Pine Island Glacier grounding lines. Housing of this effort at UC Irvine will involve UCI undergraduate and graduate student training and use, along with participation of scientists and students from other academic institutions taking part in planned ISSM workshops.As recognized in the most recent reports from Intergovernmental Panel on Climate Change (IPCC AR-4), current scientific uncertainty as to the future mass changes in the Antarctic and Greenland ice sheets, and possible accelerations in ice sheet flow into a warming ocean remains a major source in uncertainty in projections for global and local sea-level rise over the coming century. Uncertainty of sea-level rise, on a notably rapid time scale of decades to centuries, is a matter of some societal and economic relevance.