Temporal And Spatial Multiscale Assessment of mass transport by combination of Gravity Observations from GRACE and terrestrial stations

“全球地球动力学项目”(GGP)的超导重力仪网络与重复的绝对重力测量和来自永久GPS站的数据相结合，为补充GRACE卫星飞行任务产生的重力场变化提供了独特的机会。由于来自地面观测和GPS或卫星的重力数据包含有价值的质量转移信息，特别是。对于水文质量现象，它可用于评估和评价水文模型，进而有助于将水文影响从重力信号中分离出来。由于重力数据的空间和时间分辨率不同，数据集的组合可以被认为是最直接地提取最大限度的信息的方法。为了使数据集保持一致，必须弥合地面数据和卫星重力测量之间的差距。一项主要任务将是分离地面数据中的局部和区域影响。该项目的成果将有助于利用重力卫星数据评估和加强区域到大规模的质量转移模式。这项研究首先将重点放在欧洲，在那里它受益于密集和长期的观测网络，该网络涵盖了格雷斯任务期间。这项研究将为地面和卫星数据的一致组合开发的程序可以适用于世界各地的其他地点。

The network of superconducting gravimeters (SG) of the `Global Geodynamics Project¿ (GGP) in combination with repeated absolute gravity measurements and data from permanent GPS stations offers the unique opportunity to supplement the gravity field variations derived from the GRACE satellite mission. As the gravity data either from terrestrial observations together with GPS or satellites contain valuable information on mass transfers esp. hydrological mass phenomena, it can be used for the assessment and evaluation of hydrological models which in turn can help to separate hydrological influences from the gravity signals. Because of the different spatial and temporal resolution of the gravity data a combination of the data sets can be considered as the most straight forward approach to retrieve a maximum of information. For a consistent combination of the data sets this gap between terrestrial data and gravity measurements from satellites has to be bridged. One major task will be the separation of local and regional influences in the terrestrial data. The outcome of the project will help in the utilisation of gravity satellite data for the evaluation and enhancement of regional to large scale models of mass transfers. The study will first focus on Europe where it benefits from the dense and long-term observation networks, which covers the period of the GRACE mission. The procedure to be developed in this study for a consistent combination of terrestrial and satellite data can be applied to other locations worldwide.