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2014 | OriginalPaper | Buchkapitel

Local Hydrological Effects on Gravity at Metsähovi, Finland: Implications for Comparing Observations by the Superconducting Gravimeter with Global Hydrological Models and with GRACE

verfasst von : Jaakko Mäkinen, Tero Hokkanen, Heikki Virtanen, Arttu Raja-Halli, Risto P. Mäkinen

Erschienen in: Gravity, Geoid and Height Systems

Verlag: Springer International Publishing

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Abstract

We construct a model for the influence of variation in local water storage on the observations of the superconducting gravimeter (SG) T020 in Metsähovi, Finland. The following hydrological components are accounted for: (1) soil moisture and groundwater in sediments, (2) groundwater in the fractures of the crystalline bedrock, (3) snow on the ground, and (4) snow on the laboratory roof. We show that due to the geometry of the local storage, its gravity influence at the SG is only a fraction of the influence of the corresponding Bouguer sheet, and discuss the implications for comparing the SG with variation in gravity observed with GRACE. We compare the SG residuals with the variation in gravity predicted from the local model and two models of continental water storage. The general patterns are similar but there are differences in amplitude and phase. Further research is outlined.

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Vorheriges Kapitel Consistent Combination of Gravity Field, Altimetry and Hydrographic Data

Nächstes Kapitel Global Groundwater Cycles and Extreme Events Responses Observed by Satellite Gravimetry

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Titel: Local Hydrological Effects on Gravity at Metsähovi, Finland: Implications for Comparing Observations by the Superconducting Gravimeter with Global Hydrological Models and with GRACE
verfasst von: Jaakko Mäkinen
Tero Hokkanen
Heikki Virtanen
Arttu Raja-Halli
Risto P. Mäkinen
Verlag: Springer International Publishing
Buch: Gravity, Geoid and Height Systems
Print ISBN: 978-3-319-10836-0

Electronic ISBN: 978-3-319-10837-7

Copyright-Jahr: 2014
DOI: https://doi.org/10.1007/978-3-319-10837-7_35

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