Name: Katarina VardicKatarina Vardic

Project Title: “Improved Constraints on the Global Water Cycle from Geodesy and Models of Glacial Isostatic Adjustment”

Cohort: 2016/17


Newcastle University, School of Civil Engineering and GeosciencesGeodesy Research Group




I studied Geodesy and Geoinformatics at the University of Zagreb in Croatia. After a Bachelor’s in Geodesy and Geoinformatics, during my Master studies, I’ve concentrated on Physical Geodesy. I wrote my Master’s thesis at Technical University Munich dealing with time variable gravity field and mass changes which got me interested in my current research.

My PhD is dealing with improving constraints on global water cycle from GIA (Glacial Isostatic Adjustment) and geodetic observations. Glacial Isostatic Adjustment (GIA) is the long-term response of the solid Earth to mass redistribution after the last glacial maximum and it causes lateral and vertical movements of the Earth’s surface, especially at higher and mid latitudes. The GIA process is hard to distinguish from the deformational response to decadal and longer term changes in continental water storage and the mass of glaciers and ice sheets. To some extent, it is also hard to distinguish it from millennial-term lateral motion due to plate tectonics. It is necessary to know the value of GIA to properly interpret sea-level change and ice-sheet mass balance from gravity data and altimetry.

In my PhD I will use surface velocity fields developed from GNSS measurements using TANYA reference frame combination software to compare and test GIA models. The suite of residual fields evaluated with different GIA models will be used to calculate recent surface mass loading with particular reference to global water cycle.


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