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可能的未来海平面上升具有重要意义。 最近的观察数据表明，格陵兰岛的质量损失加速，随之而来的全球海平面上升。 但是，关于未来趋势可能没有共识。 因此，确定解决格陵兰冰盖稳定性问题的优先级有迫切之处。 提供了有关格陵兰冰盖稳定性的研讨会的资金。 将组建一个专家社区，以评估格陵兰冰盖历史的当前知识状态和对气候强迫的敏感性。 该小组还将提出关键的研究优先级，以促进格陵兰冰盖稳定性问题的牵引力。 对格陵兰冰纸历史，相关过程及其可能的未来的了解得以提高，将极大地影响我们预测和减轻海平面上升的能力。该研讨会将保证性别和年龄多样性，从而确保将新成员引入研讨会代表的国家和国际社会。 了解冰盖稳定性对于理解和预测海平面上升至关重要。 但是，我们目前没有数据或模型，这些数据或模型允许过去对冰盖变异性的确定观点，而不是未来。 宇宙同位素的最新测量要求在GISP2 Summit钻头上缺少冰块，以便大量更新世。另一方面，已经解释了来自格陵兰中部其他冰芯以及来自近海记录的其他冰核的新数据，以表明冰盖通过Plio-Pleistecene的持续存在。 虽然数值冰盖模拟在上一次冰期期间显示出一个较小但相对完整的格陵兰冰盖，但冰川动力学界的新发现揭示了可能导致格陵兰岛大陆冰崩溃的过程。 因此，研讨会将着重于评估和核对四个重要子学科的知识状态和理解 - 冰芯，地层记录，冰盖建模和冰盖工艺。