Gravity Changes, Soil Moisture and Data Assimilation

该项目将评估空间和地面重力测量在监测区域范围内水循环变化方面的作用。目前还没有监测全球陆地水储存变化的方法，尽管这些方法对评估大规模土地利用变化和气候变化的影响很重要。NASA的重力恢复和气候实验卫星将于今年晚些时候发射，这将为开展地面研究提供5年的机会，以测试这项通过重力测量监测陆地水储存的创新技术--这在理论上已经证明是可能的，但直到现在才得到测试。

This project will assess the utility of space and ground based gravity measurements for monitoring changes in the hydrological cycle at regional scales. At present there are no methods available for monitoring changes in terrestrial water storage over the globe, despite their importance for assessing the effects of large-scale changes in land use and climate change. The launch of NASA's Gravity Recovery and Climate Experiment satellites later this year provides a 5-year window of opportunity to undertake ground-based research to test this innovative technique for monitoring terrestrial water storage from gravity measurements - something that has been shown to be possible theoretically, but has not been testable until now.