Szczegóły

Tytuł artykułu

On the estimation of physical height changes using GRACE satellite mission data – A case study of Central Europe

Tytuł czasopisma

Geodesy and Cartography

Rocznik

2017

Wolumin

vol. 66

Numer

No 2

Autorzy publikacji

Słowa kluczowe

GRACE ; height anomaly variations ; vertical displacements ; physical height changes

Wydział PAN

Nauki Techniczne

Abstrakt

The dedicated gravity satellite missions, in particular the GRACE (Gravity Recovery and Climate Experiment) mission launched in 2002, provide unique data for studying temporal variations of mass distribution in the Earth’s system, and thereby, the geometry and the gravity field changes of the Earth. The main objective of this contribution is to estimate physical height (e.g. the orthometric/normal height) changes over Central Europe using GRACE satellite mission data as well as to analyse them and model over the selected study area. Physical height changes were estimated from temporal variations of height anomalies and vertical displacements of the Earth surface being determined over the investigated area. The release 5 (RL05) GRACE-based global geopotential models as well as load Love numbers from the Preliminary Reference Earth Model (PREM) were used as input data. Analysis of the estimated physical height changes and their modelling were performed using two methods: the seasonal decomposition method and the PCA/ EOF (Principal Component Analysis/Empirical Orthogonal Function) method and the differences obtained were discussed. The main findings reveal that physical height changes over the selected study area reach up to 22.8 mm. The obtained physical height changes can be modelled with an accuracy of 1.4 mm using the seasonal decomposition method.

Wydawca

Commitee on Geodesy PAS

Data

2017.12.15

Typ

Artykuły / Articles

Identyfikator

ISSN 2080-7636

Referencje

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DOI

10.1515/geocart-2017-0013

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