Implementation of Advanced Land-Ice Models in the Community Earth System Model

该奖项为南极综合系统科学和极地项目办公室的北极自然科学项目“在社区地球系统模型中实施先进陆冰模型”提供支持。在气候变化时期，未来海平面上升的速度是高度不确定的，但如果冰盖融化的贡献继续增加，到2100年，全球平均海平面可能上升1米以上。Glimmer群落冰盖模型（Glimmer- cism）与群落地球系统模型（CESM）的完全耦合尚未完成，这阻碍了对未来全球海平面的理解。该合同将为软件工程师提供支持，以完成在完全动态模式下将冰模型与气候模型耦合的任务。软件工程师还将作为陆冰工作组（LIWG）和气候建模者之间的联络人。知识价值：作者建议将陆地-冰盖模型（Glimmer-CISM）与GCM （CESM）完全耦合。这种耦合如果成功，将实现IPCC上一份报告中缺少的动态耦合。由于缺乏冰盖的动力成分，IPCC第四次评估报告的最后几位作者排除了冰盖对海平面上升的贡献。在模式成功耦合之后，该小组（包括LIWG）将确定与陆冰损失相关的海平面上升幅度，以支持IPCC第5次评估报告。更广泛的影响：虽然资金将专门用于个人，但这项工作是在社区模型上完成的，因此整个研究社区都可以获得结果。就全球更广泛的影响而言，改善未来全球海平面上升预测的总体目标显然对任何生活在沿海地区的人都很重要。

This award provides support for "Implementation of Advanced Land-Ice Models in the Community Earth System Model" from the Antarctic Integrated System Science and Arctic Natural Science programs within the Office of Polar Programs. Future rates of sea-level rise in a time of climate change are highly uncertain, but global mean sea level could rise by more than one meter by the year 2100 if contributions from melting ice sheets continue to increase. Understanding future global sea level is hindered by the fact that full coupling of the Glimmer Community Ice Sheet Model (Glimmer-CISM) into the Community Earth System Model (CESM) has not been completed. This award will provide support for a software engineer to complete the task of coupling the ice model to the climate model in a fully dynamic mode. The software engineer will also serve as a liaison between the Land Ice Working Group (LIWG) and the climate modelers.Intellectual Merit: The authors propose to fully couple a land-ice sheet model (Glimmer-CISM) to a GCM (CESM). The coupling, when successful, will deliver the dynamic coupling called out as missing in the last IPCC report. The lack of a dynamic component for the ice-sheets led the last IPCC AR4 authors to exclude the contribution of ice-sheets to sea-level rise. Following the successful coupling of the models, the team (including the LIWG) will determine the range of sea-level rise associated with the loss of land-ice to support the IPCC AR5.Broader Impact: While funding will go specifically to one individual, the work is being done on community models, so the results will be available to the entire research community. With regards to the global broader impacts, the overall goal of improving future predictions of global sea-level rise is of obvious importance to anyone who lives on the coast.