Reconciling Solid Earth and Ice Sheet Temperature Estimates for Greenland

协调格陵兰岛固体地球和冰盖温度估计

• 批准号: 535728086
• 负责人: Professor Dr. Jörg Ebbing
• 金额: --
• 依托单位: Nationale Geologiske Undersøgelser for Danmark og Grønland - GEUS
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/535728086?language=en
• 关键词: Reconciling; Solid; Earth; Ice; Sheet

In our proposed project, we plan to analyse the thermal state of the Greenland ice sheet and lithosphere with a focus on reconciling temperature estimates for the two geospaces. Considerable differences exist in existing models and we first carry out robust geostatistical analysis of the uncertainties of both geothermal observations and ice temperature profiles. These point/profile-wise estimates will be first linked on a local scale by using auxiliary geophysical data (radar, gravity, magnetics) from airborne surveys in order to verify the compatibility of the estimates. In the second step, we will extend the analysis to the entire ice-sheet using temperature estimates from the SMOS satellite mission and all available geophysical data to describe both the thermal state and the geological conditions at the base of the ice-top bed interface. We will also extend our analysis to assess possibility by using a potentially improved ice temperature model, which is one of the objectives of the CryoRad satellite mission proposed as one candidate for the Earth Explorer Call 12 by the European Space Agency. All thermal models will be tested as input in models of the ice-sheet dynamics with a focus on clarifying the role of a thermal anomaly at the onset of the Northeast Greenland ice stream.

在我们提出的项目中，我们计划分析格陵兰冰盖和岩石圈的热状态，重点是协调两个地球空间的温度估计。现有的模型存在很大的差异，我们首先进行了强大的地热观测和冰温剖面的不确定性地质统计分析。这些点/剖面方面的估计数将首先通过使用航空勘测的辅助地球物理数据（雷达、重力、磁力）在局部范围内联系起来，以核实估计数的兼容性。在第二步中，我们将使用SMOS卫星使命的温度估计和所有可用的地球物理数据来描述冰顶床界面底部的热状态和地质条件，将分析扩展到整个冰盖。我们还将扩大我们的分析，以评估可能性，通过使用一个潜在的改进冰温度模型，这是CryoRad卫星使命的目标之一，提出了一个候选人的地球探测器呼叫12由欧洲航天局。所有热模型都将作为冰盖动态模型的投入进行测试，重点是澄清格陵兰东北冰流开始时热异常的作用。