Further studies on the Fennoscandian gravity field versus the Moho depth and land uplift

Whether post-glacial rebound or/and crustal variation contributes to the pattern of the Fennoscandian gravity field has been of great interest to geoscientists. Previous numerical studies are based on different Moho maps, different global Earth gravity models and different isostatic models of Pratt type, resulting in quite different conclusions.In this study, we use the improved Moho depth map of Korja et al. (1993), the OSU91A Earth gravity model and a refined modeling of the Moho depth contribution. We conclude that not more than about 40% and 30% of the Fennoscandian geoid and gravity depressions of the orders of -12m and -40 mGal might be caused by crustal thickening, leaving at least -6 m and -28 mGal to be adjusted in accordance with post-glacial rebound.