Simulation of ice sheet / sea-level feedbacks with a coupled ice sheet / solid Earth model

使用耦合冰盖/固体地球模型模拟冰盖/海平面反馈

• 批准号: 248087342
• 负责人: Dr. Ingo Sasgen
• 金额: --
• 依托单位: Sektion Paläoklimadynamik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/248087342?language=en
• 关键词: Simulation; ice; sheet; sea; level

Aim of the project is to simulate the dynamic interaction between the ice sheets, solid Earth and sea-level. This is done using a coupled ice sheet / solid Earth modeling system, describing the ice-sheet / ice shelf physics, viscoelastic Earth deformation, i.e. glacial-isostatic adjustmet (GIA) and gravitationally self-consistent sea-level variations. The investigations build upon the achievments of the first project phase of developing the coupled ice sheet / solid Earth modeling system, and applying it to a synthetic scenario. In this final project phase, the Antarctic ice sheet is simulated, and it will be quantified how sensitive different regions of the ice sheet respond to the various forcing in 1) basal melting, 2) surface-mass balance and 3) local sea-level variations. The (de-)stabilizing effect of the solid Earth deformation on the ice margin will be assessed, as well as the influence of the mantle rheology on grounding line position and the ice sheet dynamics. The hypothesis of an inter-hemispheric connection of the deglaciation of the Paleo ice sheets via sea-level is tested. The project will provide new insights into the mechanisms relevant for rapid deglaciation phases of the ice sheets.

该项目的目的是模拟冰盖、固体地球和海平面之间的动态相互作用。 这是使用耦合冰盖/固体地球模拟系统，描述冰盖/冰架物理，粘弹性地球变形，即冰川均衡调整（GIA）和重力自洽海平面变化。调查建立在开发耦合冰盖/固体地球建模系统的第一个项目阶段的成果基础上，并将其应用于合成场景。在最后的项目阶段，模拟南极冰盖，并量化冰盖的不同区域对1）基底融化，2）表面质量平衡和3）当地海平面变化的各种强迫的敏感程度。将评估固体地球变形对冰缘的（去）稳定效应，以及地幔流变学对接地线位置和冰盖动力学的影响。通过海平面的古冰盖的冰川消退的半球间连接的假设进行了测试。该项目将提供有关冰盖快速消融阶段的机制的新见解。

项目成果

The Deformational Response of a Viscoelastic Solid Earth Model Coupled to a Thermomechanical Ice Sheet Model

粘弹性固体地球模型与热机械冰盖模型耦合的变形响应

• DOI: 10.1007/s10712-013-9257-8
• 发表时间: 2014
• 期刊: Surveys in Geophysics
• 影响因子: 4.6
• 作者: Konrad;M. Thoma;I. Sasgen;V. Klemann;D. Barbi;K. Grosfeld;Z. Martinec
• 通讯作者: Z. Martinec

Antarctic ice-mass balance 2003 to 2012: regional reanalysis of GRACE satellite gravimetry measurements with improved estimate of glacial-isostatic adjustment based on GPS uplift rates

• DOI: 10.5194/tc-7-1499-2013
• 发表时间: 2013-09
• 期刊: The Cryosphere
• 作者: I. Sasgen;H. Konrad;E. Ivins;M. Broeke;J. Bamber;Z. Martinec;V. Klemann