Local hydrological effects on gravity at Metsähovi, Finland: Implications for comparing observations by the superconducting gravimeter with global hydrological models and with GRACE

Jaakko Mäkinen*, Tero Hokkanen, Heikki Virtanen, Arttu Raja-Halli, Risto P. Mäkinen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

2 Citations (Scopus)

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) soilmoisture 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.

Original languageEnglish
Title of host publicationGravity, Geoid and Height Systems - IAG Symposium GGHS2012, Proceedings
PublisherSpringer Verlag
Pages275-281
Number of pages7
Volume141
ISBN (Electronic)9783319108360
DOIs
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
EventInternational Association of Geodesy Symposia: Gravity, Geoid and Height Systems - Venice, Italy
Duration: 9 Oct 201212 Oct 2012

Conference

ConferenceInternational Association of Geodesy Symposia
Abbreviated titleGGHS
CountryItaly
CityVenice
Period09/10/201212/10/2012

Keywords

  • Continental water storage
  • GRACE
  • Groundwater
  • Hydrology
  • Snow
  • Soil moisture
  • Superconducting gravimeter

Fingerprint Dive into the research topics of 'Local hydrological effects on gravity at Metsähovi, Finland: Implications for comparing observations by the superconducting gravimeter with global hydrological models and with GRACE'. Together they form a unique fingerprint.

Cite this