Consistent estimation of water mass variations in different continental storage compartments by the com-bined inversion of a global hydrological model with time-variable gravity and complementary observation data

该项目旨在将卫星观测和现场观测一致地同化到全球水文模型WGHM中。本研究的主要目标是：(1)大陆水团在不同储层间的时空分布；(2)建立一个适当的数学公式（包括随机），用于联合估计来自多传感器的改进模型参数；(3)在使用改进的过程公式和选定区域的参数整合观测数据后，使用WGHM模拟产生改进的大陆水团变化时间序列（案例研究）。同化将基于GRACE的总储水量变化和大气-陆地水平衡，以及由外部项目提供的地表水、土壤湿度和雪区水质量的时间变化。拟议的项目符合SPP主题“了解卫星信号和短期过程”的目标。

This project aims at the consistent assimilation of satellite-based and in-situ observations into the global hydrological model WGHM. The main goals of this proposal are (1) the spatio-temporal partitioning of continental water mass variations among different storage compartments, (2) the set-up of an appropriate mathematical formulation (including stochastics) for the joint estimation of improved model parameters from multi-sensor and (3) the production of improved time series of continental water mass variations from simulation with WGHM after integration of the observation data using enhanced process formulations and parameters for selected regions (case studies). The assimilation will be based on total water storage variations from GRACE and the atmospheric-terrestrial water balance as well as an temporal variations of water mass in the compartments surface water, soil moisture and snow that are contributed by an external project. The proposed project corresponds to the goals of the SPP theme Understanding the satellite signals and Short-term processes.