The Stability of the Greenland Ice Sheet

格陵兰冰盖的稳定性

• 批准号: 1741833
• 负责人: Jason Briner
• 金额: $ 4.98万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-05-01 至 2018-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1741833&HistoricalAwards=false
• 关键词: Stability; Greenland; Ice; Sheet

The stability of the Greenland Ice Sheet has important implications for possible future sea level rise. Recent observational data suggest an acceleration of mass loss, and consequent global sea level rise, from Greenland. There is, though, no consensus on what future trends may be. Thus, there is urgency in defining priorities for addressing the Greenland Ice Sheet stability problem. Funds are provided for a workshop on the stability of the Greenland Ice Sheet. A community of experts will be assembled to assess the current state of knowledge of Greenland Ice Sheet history and sensitivity to climate forcing. The group also will suggest key research priorities that would promote traction on the problem of Greenland Ice Sheet stability. Improved understanding of Greenland Ice Sheet history, the associated processes, and its possible future will significantly impact our ability to predict and mitigate sea level rise. The workshop will guarantee gender and age diversity, thus ensuring the introduction of new members to the national and international community represented at the workshop. Understanding ice sheet stability is important for understanding and projecting sea level rise. However, we do not currently have data or models that allow for a definitive consensus view of ice sheet variability during the past, much less the future. Recent measurements of cosmogenic isotopes demand the absence of ice at the GISP2 summit drill site for significant portions of the Pleistocene. On the other hand, new and published data from other ice cores in central Greenland and from offshore sediment records have been interpreted to suggest persistence of the ice sheet through the Plio-Pleistocene. While numerical ice sheet simulations reveal a smaller, but relatively intact Greenland Ice Sheet during the Last Interglaciation, new discoveries from the glacial dynamics community reveal processes that could lead to the collapse of continental ice in Greenland. Thus, the workshop will focus on assessing and reconciling the state of knowledge and understanding of four important sub-disciplines - ice coring, stratigraphic records, ice sheet modeling, and ice sheet processes.

格陵兰冰盖的稳定性对未来海平面可能上升有重要影响。 最近的观测数据表明，格陵兰岛的质量损失加速，从而导致全球海平面上升。 然而，对于未来的趋势可能是什么，还没有达成共识。 因此，迫切需要确定解决格陵兰冰盖稳定性问题的优先事项。 为举办一个关于格陵兰冰盖稳定性的讲习班提供了资金。 将召集一批专家，评估格陵兰冰盖历史的知识现状和对气候强迫的敏感性。 该小组还将提出关键的研究重点，以促进格陵兰冰盖稳定性问题的解决。 对格陵兰冰盖历史、相关过程及其可能的未来的更好理解将显著影响我们预测和减缓海平面上升的能力。讲习班将保证性别和年龄的多样性，从而确保向参加讲习班的国家和国际社会介绍新成员。 了解冰盖的稳定性对于了解和预测海平面上升非常重要。 然而，我们目前没有数据或模型，可以对过去冰盖的变化形成明确的共识，更不用说未来了。 最近的宇宙成因同位素测量要求在更新世的重要部分，在GISP 2峰会钻探现场没有冰。另一方面，格陵兰中部其他冰芯和近海沉积物记录的新数据和已发表的数据表明，冰盖在上新世-更新世期间一直存在。 虽然数值冰盖模拟揭示了末次间冰期期间较小但相对完整的格陵兰冰盖，但冰川动力学社区的新发现揭示了可能导致格陵兰大陆冰崩溃的过程。 因此，研讨会将侧重于评估和协调四个重要子学科的知识和理解状态-冰取芯，地层记录，冰盖建模和冰盖过程。