Develop a methodology for merging marine, airborne, and satellite magnetic surveys and compile a world digital magnetic anomaly map

磁测量在揭示地球岩石圈的结构和动力学方面发挥了关键作用。因此，有人可能会问，为什么迄今为止没有编制全球磁异常图。一个重要的原因是，地核的主磁场变化迅速，使得在不同时间、地点和高度测量的数据很难结合起来。在这里，我提出了一个方案来编制一个世界数字磁异常图，基于一个新的，可逆源表示的地壳场。这种表示的长波长可以从卫星和长剖面航磁数据中唯一确定。在局部，表示将被调整为包括高通滤波的航磁和海洋磁汇编的短波长信息。最终的震源表示可以用来生成任何期望高度的磁场图，包括总场异常、垂直分量，甚至是磁异常的标量势。

Magnetic surveys have played a key role in unravelling the structure and dynamics of the Earth's lithosphere. One may wonder, therefore, why no global magnetic anomaly map has been compiled to date. An important reason is that the rapidly changing main magnetic field from the Earth's core renders it difficult to combine data measured at different times, locations and altitudes. Here, I propose a scheme for compiling a world digital magnetic anomaly map, based on a new, invertible source representation of the crustal field. The long wavelengths of this representation can be uniquely determined from satellite and long profile aeromagnetic data. Locally, the representation will be adjusted to include the short wavelength information from high pass filtered aeromagnetic and marine magnetic compilations. The final source representation can then be used to produce maps of the magnetic field at any desired altitude in terms of the total field anomaly, the vertical component, or even the scalar potential of the magnetic anomaly.