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DOI	10.1016/j.tecto.2020.228428
	Upper mantle density and surface gravity change in Fennoscandia, determined from GRACE monthly data
	Sjöberg L.E.; Bagherbandi M.
发表日期	2020
ISSN	00401951
卷号	782-783
英文摘要	Precise gravity measurements have been repeatedly observed in Fennoscandia since the 1960-ties, first by relative gravimeters, then by absolute gravimeters, for studying the temporal change of gravity related with the on-going glacial isostatic adjustment (GIA). The results of such studies are vital for understanding GIA processes and tuning GIA and Earth structure models. This study uses monthly repeated data from the twin satellite mission GRACE for 164 months between 2003 and 2016 for estimating the temporal change of surface gravity, its ratio (f) to the land uplift rate as well as the upper mantle density related with the viscous mass flow in the mantle. The maximum negative change of gravity is estimated to −1.8 μGal/yr, and f is estimated to −0.172 ± 0.018 μGal/mm. The solutions for f from the three independent techniques (relative, absolute and satellite gravity observations) were found to agree statistically without significant biases, and they were merged in a joint solution to −0.166 ± 0.004 μGal/mm, corresponding to a mean upper mantle mass flow density of 3402.5 ± 95 kg/m3, which decreases towards the uplift center. © 2020 Elsevier B.V.
关键词	Fennoscandia Glacial isostatic adjustment Gravity change Mantle density Postglacial rebound
英文关键词	Geodetic satellites; Gravimeters; Mass transfer; Absolute gravimeter; Earth structures; Glacial isostatic adjustment; Gravity measurement; Satellite gravity; Satellite mission; Surface gravity; Temporal change; Gravitation; GRACE; gravimetry; satellite data; satellite mission; temporal variation; uplift; upper mantle; Fennoscandia
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207882
作者单位	Faculty of Engineering and Sustainable Development, University of Gävle, Gävle, SE-80176, Sweden; Division of Geodesy and Satellite Positioning, Royal Institute of Technology (KTH), Stockholm, SE-10044, Sweden
推荐引用方式 GB/T 7714	Sjöberg L.E.,Bagherbandi M.. Upper mantle density and surface gravity change in Fennoscandia, determined from GRACE monthly data[J],2020,782-783.
APA	Sjöberg L.E.,&Bagherbandi M..(2020).Upper mantle density and surface gravity change in Fennoscandia, determined from GRACE monthly data.Tectonophysics,782-783.
MLA	Sjöberg L.E.,et al."Upper mantle density and surface gravity change in Fennoscandia, determined from GRACE monthly data".Tectonophysics 782-783(2020).