Vertical land motion and the redistribution of masses within and on the surface of the Earth affect the Earth’s gravity field. Hence, studying the ratio between temporal changes of the surface gravity \(\left( {\dot{g}} \right)\) and height (\(\dot{h}\)) is important in geoscience, e.g., for reduction of gravity observations, assessing satellite gravimetry missions, and tuning vertical land motion models. Sjöberg and Bagherbandi (2020) estimated a combined ratio of \(\dot{g}/\dot{h}\) in Fennoscandia based on relative gravity observations along the 63 degree gravity line running from Vågstranda in Norway to Joensuu in Finland, 688 absolute gravity observations observed at 59 stations over Fennoscandia, monthly gravity data derived from the GRACE satellite mission between January 2003 and August 2016, as well as a land uplift model. The weighted least-squares solution of all these data was \(\dot{g}/\dot{h}\) = − 0.166 ± 0.011 μGal/mm, which corresponds to an upper mantle density of about 3402 ± 95 kg/m³. The present note includes additional GRACE data to June 2017 and GRACE Follow-on data from June 2018 to November 2023. The resulting weighted least-squares solution for all data is \(\dot{g}/\dot{h}\) = − 0.160 ± 0.011 μGal/mm, yielding an upper mantle density of about 3546 ± 71 kg/m³. The outcomes show the importance of satellite gravimetry data in Glacial Isostatic Adjustment (GIA) modeling and other parameters such as land uplift rate. Utilizing a longer time span of GRACE and GRACE Follow-on data allows us to capture fine variations and trends in the gravity-to-height ratio with better precision. This will be useful for constraining and adjusting GIA models and refining gravity observations.

垂直陆地运动以及地球内部和表面质量的重新分布会影响地球的重力场。因此，研究表面重力 \（\left（ {\dot{g}} \right）\） 和高度 （\（\dot{h}\）） 的时间变化之间的比率在地球科学中很重要，例如，用于减少重力观测、评估卫星重力测量任务和调整垂直陆地运动模型。Sjöberg 和 Bagherbandi （2020） 根据从挪威 Vågstranda 到芬兰 Joensuu 的 63 度重力线沿线的相对重力观测，在芬诺斯坎迪亚的 59 个站点观测的 688 次绝对重力观测，2003 年 1 月至 2016 年 8 月期间来自 GRACE 卫星任务的月度重力数据，估计了芬诺斯坎迪亚的 \（\dot{g}/\dot{h}\） 的综合比率。 以及土地隆起模型。所有这些数据的加权最小二乘解为 \（\dot{g}/\dot{h}\） = − 0.166 ± 0.011 μGal/mm，这对应于大约 3402 ± 95 kg/m³ 的上地幔密度。本说明包括截至 2017 年 6 月的额外 GRACE 数据以及 2018 年 6 月至 2023 年 11 月的 GRACE 后续数据。所有数据的加权最小二乘解为 \（\dot{g}/\dot{h}\） = − 0.160 ± 0.011 μGal/mm，得到的上地幔密度约为 3546 ± 71 kg/m³。结果显示了卫星重力测量数据在冰川等静压校正 （GIA） 建模和其他参数（如陆地隆升速率）中的重要性。利用更长的 GRACE 和 GRACE 后续数据的时间跨度，我们可以更精确地捕捉重力高度比的精细变化和趋势。这对于约束和调整 GIA 模型以及优化重力观测非常有用。