Determination of the Fennoscandian Land Uplift and Mass Variations in Northern Europe from GRACE Data

由GRACE月解得出的重力场变化是大气、水圈和地圈质量变化的综合效应。这些影响包括海洋、大气和水文团块的运动以及由地球内部动力学引起的运动。此外，由于预处理不足可能存在残留信号。该项目的主要目标是从GRACE数据中提取北欧（和加拿大）的质量变化，特别是那些与Fennoscandian陆地隆起有关的数据。冰川均衡调整（GIA）一个关键问题是通过应用专用滤波器（例如高斯或非各向同性）和分析技术（例如模式识别）来分离各种信号部分并减少观察到的（或导出的）数量。将以一致的方式分析每个过程的相关时间尺度（如每年、半年、长期）。除了对各个信号部分进行滤波外，为了确定相互关系和相应的精度，对单个测量和约简模型的质量评估也具有特殊的意义。然后将凸起结果进行比较。结合地面数据。最后，将开发的方法推广到其他地区（如多年冻土区），并推广结果。

Gravity field variations as derived from the monthly GRACE solutions result from the integral effect of mass variations in the atmosphere, hydrosphere and geosphere. These effects include oceanic, atmospheric and hydrological mass movements and those caused by dynamics in the Earth¿s interior. In addition, residual signals from insufficient pre-processing may be present. The main objective of this project is to extract mass variations in Northern Europe (and Canada) from the GRACE data, especially those which are related to the Fennoscandian land uplift resp. glacial isostatic adjustment (GIA). One key issue is the separation of the various signal parts and the reduction of the observed (or derived) quantities by applying dedicated filter (e.g. Gaussian or non-isotropic) and analysis techniques (e.g. pattern recognition). The relevant time scales (e.g. annual, semi-annual, secular) for each process will be analysed in a consistent way. Besides filtering of the various signal parts, the quality assessment of the individual measurements and the reduction models are of special relevance, in order to determine the interrelations and the corresponding accuracies. The uplift results will then be compared resp. combined with terrestrial data. Finally, the developed methods shall be transferred to other regions (e.g. permafrost regions) and the results shall be generalised.