论文标题
恩典 - 理解深地球内部的重力数据
GRACE -- gravity data for understanding the deep Earth's interior
论文作者
论文摘要
虽然宽限期任务的时间重力变化的主要原因是由于水质量重新分布在地球表面发生的，这是对气候和人为强迫的响应（例如，海洋水文学，海洋质量，冰川和冰淇淋的质量变化），但固体地球的质量分配也记录在这些观察结果上。尤其是冰川等静态调整（GIA）或地幔对最后一次脱气的粘性响应的情况。但是，直到最近才表明，重力数据还包含外芯内部流的特征及其对核心壳边界（CMB）的影响。在宽限期观察中检测深地球的过程提供了一个令人兴奋的机会，可以提供对核心掩体界面动态的更多见解。在这里，我们介绍了优美的（重为重量，磁和核心流）项目的一个方面，即使用重力场数据来理解地球流体核心和核心掩体边界内部的动态过程，旁边是通过地磁场变量提供的动态过程。
While the main causes of the temporal gravity variations observed by the GRACE space mission result from water mass redistributions occurring at the surface of the Earth in response to climatic and anthropogenic forcings (e.g., changes in land hydrology, in ocean mass, in mass of glaciers and ice sheets), solid Earth's mass redistributions are also recorded by these observations. This is the case, in particular, for the Glacial Isostatic Adjustment (GIA) or the viscous response of the mantle to the last deglaciation. However, it is only recently showed that the gravity data also contain the signature of flows inside the outer core and their effects on the core-mantle boundary (CMB). Detecting deep Earth's processes in GRACE observations offers an exciting opportunity to provide additional insight on the dynamics of the core-mantle interface. Here, we present one aspect of the GRACEFUL (GRavimetry, mAgnetism and CorE Flow) project, i.e. the possibility to use the gravity field data for understanding the dynamic processes inside the fluid core and core-mantle boundary of the Earth, beside that offered by the geomagnetic field variations.
