Fingerprints of ice melting in geodetic GRACE and ocean modelling

这项建议的总目标是更好地量化格陵兰/南极冰盖和陆地冰川对目前海平面上升的影响。为此目的，格陵兰岛或南极洲均匀融化的指纹过去曾与潮汐测量数据一起使用。我们将扩展以前的工作，对指纹识别更现实的融化模式在GRACE和海面高度在公海，包括水文，空间和GIA引起的贡献，在我们的分析海平面。将对冰盖融化引起的陆地变形和大地水准面变化以及海洋表面地形进行正演模拟。GRACE和海面高度测量，从测高和验潮仪，在一个反计划的结合使用将进行调查。格陵兰岛和南极冰损失和陆地冰川质量不平衡的个人贡献估计，包括我们的解决方案的误差方差/协方差。此外，水文，空间位阻和GIA引起的海平面的贡献将在反演调整。计算了欧洲相对海平面的非均匀变化。我们对冰融化的最终估计构成了评估和预测实验的基础。海洋输送和纬向翻转环流对额外的淡水输入的响应将被检查。最后，我们将扩大我们的调查，以补充数据（重力测量，冰测高），并评估未来的观测系统的潜力。

The general aim of this proposal is to improve the quantification of the Greenland/Antarctica ice sheet and land glacier contributions to present-day sea level rise. For this purpose fingerprints of uniform melting of Greenland or Antarctica have been used in the past in conjunction with tide gauge data. We will extend previous work towards the identification of fingerprints of more realistic melting patterns in GRACE and sea surface height in the open ocean, and include hydrological, steric and GIA-induced contributions to sea level in our analysis. Forward modelling of land deformations and geoid change as well as ocean surface topography in response to melting ice sheets will be performed. The combined use of GRACE and sea surface height measurements, from Altimetry and tide gauges, in an inverse scheme will be investigated. Individual contributions for Greenland and Antarctic ice loss and land glacier mass imbalance are estimated including the error variance/co-variance of our solution. In addition, hydrological, steric and GIA-induced contributions to sea level will be adjusted within the inversion. The non-uniform change of relative sea level for Europe will be calculated. Our final estimates of ice melting form the basis of an assessment and prediction experiment. The response of ocean transports and meridional overturning circulation to the additional fresh water input will be examined. Finally, we will extend our investigations towards to complementary data (gravimetry, ice altimetry) and assess the potential of future observing systems.