Loading effects in Metsähovi from the atmosphere and the Baltic Sea

Virtanen, Heikki

doi:10.1016/j.jog.2004.07.018

Cited by 19 publications

(17 citation statements)

References 16 publications

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“…Among them is Metsähovi, Finland, where GPS, VLBI and absolute gravimetrysupplemented by the nearby tide gauge at Helsinki -can be used (Virtanen, 2004). The same combination of observational techniques exists at Ny-Ålesund, Svalbard, and was used to study effects due to the last deglaciation and recent ice-mass changes (Hagedoorn and Wolf, 2003).…”

Section: Introductionmentioning

confidence: 99%

A Reanalysis and Reinterpretation of Geodetic and Geological Evidence of Glacial-Isostatic Adjustment in the Churchill Region, Hudson Bay

et al. 2006

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Abstract. We review the historical, geological, tide-gauge, GPS and gravimetric evidence advanced in favour of, or against, continuing land uplift around Hudson Bay, Canada. We also reanalyse the tide-gauge and GPS data for Churchill using longer time series than those available to previous investigators. The dependence of the mean rate of relative sea-level change obtained from the tide-gauge record on the length and mid-epoch of the observation interval considered is investigated by means of a newly developed linear-trend analysis diagram. For studying the shorter-period variability of the tide-gauge record, the wavelet transform is used. The mean rate of land uplift obtained from GPS is based on a new analysis using IGS solutions of

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Section: Introductionmentioning

confidence: 99%

A Reanalysis and Reinterpretation of Geodetic and Geological Evidence of Glacial-Isostatic Adjustment in the Churchill Region, Hudson Bay

et al. 2006

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“…For example, Richter et al (2004) show that the long-term variation of gravity, which is observed at Medicina and Wetzell, is more likely due to mass changes (involving atmosphere, ocean, soil consolidation) than to tectonic displacements. Virtanen (2004) evidences the effect of the Baltic Sea on gravity.…”

Section: Strasbourg-j9mentioning

confidence: 99%

Crustal vertical motion along a profile crossing the Rhine graben from the Vosges to the Black Forest Mountains: Results from absolute gravity, GPS and levelling observations

Amalvict

Hinderer²,

Rózsa³

2006

Journal of Geodynamics

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“…He found that gravity records are well-correlated with groundwater and Watershed Simulation and Forecasting System for Finland. Virtanen (2004) studied the effect of atmospheric loading and the Baltic Sea on the gravity and height data. He showed that this effect explains nearly 40% of the variance of daily GPS height solutions.…”

Section: Stochastic Partmentioning

confidence: 99%

On the noise characteristics of time series recorded with nearby located GPS receivers and superconducting gravity meters

et al. 2018

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The inter-comparison of ground gravity measurements and vertical surface displacements enables to better understand the structure, dynamics and evolution of the Earth's system. Within this research we analyzed the Global Positioning System vertical position time series acquired in the vicinity of the superconducting gravimeters. We estimated of noise character of GPS and SG by comparison of the satellite and terrestrial measurements collected at 18 globally distributed neighboring sites. The comparable results were provided by applying the appropriate and corresponding models of geophysical phenomena to obtain residual time series, and by unifying the sampling rate since the noise characteristics may depend on it. The deterministic part of the series was assumed to follow the Polynomial Trend Model and was subtracted prior to noise analysis. Then, a combination of power-law and white noise was presumed and the Maximum Likelihood Estimation implemented in the Hector software to investigate the stochastic part was applied. Within the paper, we show that the spectral indices for all SG time series fall in the area of fractional Brownian motion (-2 \ j \ -1), while GPS data are best characterized by fractional Gaussian noises (-1 \ j \ 0). The estimated ratio between spectral indices of GPS and SG is stable worldwide with a global median value of about 0.5. Concerning the power-law amplitudes, these are very consistent worldwide for the GPS position time series and fluctuate around 15 mm/year -j/4 , while in the case of SG records they spread between 60 and 300 nm/ s 2 /year -j/4 . The fraction of power-law noise employed in the assumed combination is equal to 100% for almost all SG stations, while in case of GPS it varies between 26.1 and 99.9%. The main finding of this research is that the assumption of power-law noise is much more preferred for SG data than the assumption of a pure white noise being used until now.

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Loading effects in Metsähovi from the atmosphere and the Baltic Sea

Cited by 19 publications

References 16 publications

A Reanalysis and Reinterpretation of Geodetic and Geological Evidence of Glacial-Isostatic Adjustment in the Churchill Region, Hudson Bay

A Reanalysis and Reinterpretation of Geodetic and Geological Evidence of Glacial-Isostatic Adjustment in the Churchill Region, Hudson Bay

Crustal vertical motion along a profile crossing the Rhine graben from the Vosges to the Black Forest Mountains: Results from absolute gravity, GPS and levelling observations

On the noise characteristics of time series recorded with nearby located GPS receivers and superconducting gravity meters

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