Description: Dieses Projekt beschäftigt sich mit der Vorwärts- und Inversmodellierung der viskoelastischen Erdantwort auf saisonale, sowie langzeitliche Umverteilungen von Eis- und Wassermassen. Dabei liegt dem Erdmodell eine dreidimensionale Mantelviskositätsverteilung zugrunde. Der Projektfokus liegt auf der Interpretation von GRACE Schwerefeldmodellen und auf der Untersuchung des Zusammenhangs zwischen globalen Deformationen und Edrotationsschwankungen.
Types:
SupportProgram
Origins:
/Wissenschaft/GFZ
/Bund/UBA/UFORDAT
Tags:
Eis
?
Glaziologie
?
Erdbeobachtung
?
Gletscherschwund
?
Bodenphysik
?
Erdkruste
?
Jahreszeit
?
Meeresspiegel
?
Messdaten
?
Viskosität
?
Modellierung
?
Satellitenfernerkundung
?
Erdoberfläche
?
Gezeiten
?
Mathematische Methode
?
Globale Aspekte
?
Auftrieb
?
Erdrotation
?
GRACE
?
Geoid
?
Glazial-isostatischer Ausgleichsprozess
?
Global Positioning System
?
Schwerefeldmodell
?
Validierung
?
glacial rebound
?
land uplift
?
mantle viscosity
?
viscoelastic relaxation
?
Region:
Brandenburg
Bounding boxes:
13.01582° .. 13.01582° x 52.45905° .. 52.45905°
License: cc-by-nc-nd/4.0
Language: Deutsch
Organisations
Time ranges:
2006-01-01 - 2008-12-31
Alternatives
-
Language: Englisch/English
Title: GACR: Glacial isostatic adjustment (GIA) - Inference of the Earth's lateral viscosity structure from observations of the GRACE gravity mission, GPS and glacial isostatic adjustment
Description: The project deals with the forward and inverse modeling of viscoelastic response of the Earth with three-dimensional mantle viscosity distribution to seasonal and secular ice-mass and water-mass variations. The objectives of this study are as follows. 1.) The inverse modelling of viscoelastic relaxation problem for the determination of a set of admissible 3-D viscosity models that are compatible with surface observations of glacial rebound uplift and with the recent GRACE satellite signals and GPS data and 2.) validating the mathematical formulation and improving numerical realization of the initial and boundary-value problem for the viscoelastic relaxation of a sphere with 3-D viscosity. The goal of the project is to provide a complex view of the possibilities of determining a complicated structure of mantle viscosity from the observations of glacial rebound and recent satellite gravity and positioning data. Section 1.5. is in particular involved in providing a consistent mathematical description of glacial isostatic adjustment involving the effect of the Earth's rotation variation and tidal deformation of a 3-D viscoelastic earth. Besides theoretical meaning, the results of the project will be applicable to determine the present-time rate of geoid and land uplift over the territory of deglaciation and the present-time rate of sea-level change.
https://ufordat.uba.de/UFORDAT/pages/PublicRedirect.aspx?TYP=PR&DSNR=1015842
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