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

结合 GRACE 和地面站的重力观测对质量运输进行时空多尺度评估

• 批准号: 30101544
• 负责人: Dr. Christoph Förste, since 2/2010
• 金额: --
• 依托单位: Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/30101544?language=en
• 关键词: Temporal; Spatial; Multiscale; Assessment; mass

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.

“全球地球动力学项目”（GGP）的超导重力计（SG）网络与重复的绝对重力测量和永久 GPS 站的数据相结合，提供了独特的机会来补充 GRACE 卫星任务产生的重力场变化。由于来自地面观测以及 GPS 或卫星的重力数据包含有关质量传递的有价值的信息，尤其是。水文质量现象，它可用于水文模型的评估和评价，从而有助于将水文影响与重力信号分开。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检索最大信息的最直接的方法。为了实现数据集的一致组合，必须弥合地面数据和卫星重力测量之间的差距。一项主要任务是分离地面数据中的本地和区域影响。该项目的成果将有助于利用重力卫星数据来评估和增强区域到大规模的质量传递模型。该研究将首先关注欧洲，那里受益于密集且长期的观测网络，涵盖了 GRACE 任务期间。本研究中开发的用于地面和卫星数据一致组合的程序可以应用于世界各地的其他地点。