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.

在我们拟议的项目中，我们计划分析格陵兰冰盖和岩石圈的热状态，重点是对两个地理空间的调和温度估计。现有模型中存在很大的差异，我们首先对地热观测和冰温特征的不确定性进行了强大的地统计分析。这些点/轮廓的估计将首先通过使用空气传播调查的辅助地球物理数据（雷达，重力，磁力）来局部尺度链接，以验证估计值的兼容性。在第二步中，我们将使用SMOS卫星任务的温度估计以及所有可用的地球物理数据将分析扩展到整个冰片，以描述冰顶床界面的热状态和地质条件。我们还将扩展分析以通过使用潜在的改进的冰温模型来评估可能性，这是欧洲航天局提议作为地球探险家召唤12候选人的一个卫星任务的目标之一。所有热模型都将在冰片动力学模型中作为输入进行测试，重点是阐明东北格陵兰冰流开始时热异常的作用。