The influence of continental water storage on gravity rates estimates: case study using absolute gravity measurements from area of Lower Silesia, Poland

Title:

The influence of continental water storage on gravity rates estimates: case study using absolute gravity measurements from area of Lower Silesia, Poland

Creator:

Rajner, Marcin, Olszak, Tomasz, Rogowski, Jerzy, and Walo, Janusz

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:9a7d25f7-af54-44c6-8bb6-4ae77539d085
uuid:9a7d25f7-af54-44c6-8bb6-4ae77539d085
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, gravitace, hydrologie, gravity, hydrology, Dolní Slezsko, absolute gravity, FG5 instrument, hydrology loading, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

In order to utilize the absolute gravity ( AG) measurements in terms of tectonic study it is necessary to reduce all disturbing environmental and instrumental effects. Many of those can be easily modelled and this step is done routinely during measurements (i.e. tide, polar motion, ocean tidal loading). Other remains in data and there is a lack of conventional models for them. Significant gravity variation is associated with changes of soil water at global scale. We study this effect for the Lower Silesia (South-western Poland) territory. Computed gravity changes can reach up to 2 μgal peak-to-peak amplitude with seasonal time scale. This effect is beyond of accuracy of modern ballistic gravimeter. Using real data collected with FG5 gravimeter we show here that neglecting of this phenomenon can lead to serious misinterpretation in term of secular gravity changes. This is emphasized especially when only sparse data of a few year time span is at our disposal. No attempt of modelling of local hydrology impact on effect was made, while in this study we concentrate on large scale water storage influence on measured gravity., Marcin Rajner, Tomasz Olszak, Jerzy Rogowski and Janusz Walo., and Obsahuje bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2012 Volume:9 | Number:4 (168)

Harvested from:

CDK

Metadata only:

false