Consistent integration of global gravity field information into earth process models

高时空分辨率的地球重力场模型通常以球谐模型的形式提供。这种灵活的符号允许将地球S重力场的各种泛函吸收到一个均匀的模型中。为了便于将这些重力场信息集成到地球过程模型中，以一致地考虑空间分辨率和时间变化的方式，必须将全球球谐模型转换为面向应用的网格线或表面模型的数值表示。该项目的目标是制定程序，以便将重力场参数及其方差-协方差信息最佳地整合到地球科学过程模型中。重点将放在有效表示方差-协方差信息上，同时严格考虑整个积分过程的数字特征。这一结果将与所有使用区域网格化重力数据(如高度或重力异常)来模拟地球过程的地球科学家有关。

Earth gravity field models with high spatial and temporal resolution are usually provided in terms of spherical harmonic models. This flexible notation allows assimilating various functionals of the earth¿s gravity field into one homogeneous model. To facilitate the integration of such gravity field information into earth process models in a way that the spatial resolution and the temporal variations are consistently taken into account, the global spherical harmonic model must be transformed into an application-oriented numerical representation as gridded line or surface models. The goal of this project is to develop procedures that allow an optimal integration of gravity field parameters and their variance-covariance information into geo-scientific process models. The focus will be on the efficient representation of the variance-covariance information while taking strictly into account the numerical characteristics of the entire integration process. The results will be relevant for all the geoscientists that use regionally gridded gravity data such as height or gravity anomalies for the purpose of modeling earth processes.