Estimation of Glacial Rebound Effect by Vertical Velocity Analysis Method
Estimation of Glacial Rebound Effect by Vertical Velocity Analysis Method
The physical phenomena occurring on the Earth with constant dynamic structural changes slowly. Glacial withdrawal movements are geokodetic changes. Glacial Isostatic Adjustment (GIA) can be used to estimate the earth's surface, gravitational field and oceans' response to the growth and melting of ice layers (King et al., 2010). However, the data needs of these models and the approaches in mathematical analysis reveal the need for a simplifiedd, less demanding model. The aim of this paper is to realize the estimation of the post glacial rebound effect by means of GPS (Global Positioning System) campaign and measurement evaluation methods. In this study, the linear trend calculation observed in the vertical velocity component and the estimation of the shell rise after glacier retraction were investigated. In this direction, time series belonging to 34 IGS stations with 24-hour period of 1995-2017 were used. By means of the MATLAB program, the values of R2 were calculated by least squares method. After that, the spatial interpolation was made by the ArcGIS program with ”ordinary kriging” which is a geostatistics technique for obtaining the spatial representation of the R2 values on the earth was obtained. The obtained map was compared with the map obtained by Milen GIA model (2002) and the results were interpreted. The results present that the post glacial rebound rates appears to be 88% compatible with the R2 values. In conlusion, detection and investigation of glacial effects in any region on earth can be performed with only vertical velocity monitoring by GPS campaigns.
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- ISSN: 2536-474X
- Başlangıç: 2017
- Yayıncı: Tarım ve Orman Bakanlığı Su Yönetimi Genel Müdürlüğü
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Estimation of Glacial Rebound Effect by Vertical Velocity Analysis Method