Objectives As an indicator of Earth's climate system, the mass change of Greenland ice sheet (GrIS) has been becoming a hot topic at global climate change, and it is key scientific issues that research sea level change.
Methods We discuss the GrIS mass balance in recent multiyear based on the geodesy technique and climate model with analysis of the mechanism, and summarize the weakness and strength for each method.
Results The results based on various methods such as satellite gravity and altitude measurement indicate that there are significant differences in the calculated GrIS mass changes due to the inherent characteristics of different methods, resulting in significant uncertainty for future sea level projection. The quickly change of GrIS mass is closely related with multiple driving factors, includes radiation feedback accounted for geographical environment, thermodynamic process of marine and atmospheric, ice sheet dynamic process, and so on.
Conclusions However, the interaction between different mechanisms is still inconclusive. It is further pointed out that the application of multi-source data fusion, and the further optimization of polar ice sheet models will be important directions for the future study of GrIS quality change and its response to climate change.
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