Print Email Facebook Twitter A comparison of physics-based model computed and GNSS observed vertical land displacement of Greenland Title A comparison of physics-based model computed and GNSS observed vertical land displacement of Greenland Author Bemelmans, Mark (TU Delft Civil Engineering and Geosciences) Contributor Ditmar, P.G. (mentor) Verhagen, S. (graduation committee) Degree granting institution Delft University of Technology Programme Geoscience and Remote Sensing Date 2019-06-11 Abstract By combining the RACMO2.3 RCM output with GRACE non-tidal ocean and atmospheric pressure anomaly as well as geo-center motion corrections from 2003 to 2017, a physics-based model to estimate the vertical displacement of the Greenland surface bedrock is created. This model is able to convert the mass and pressure anomalies into vertical displacement in the spherical harmonic domain with the use of load deformation coefficients based on the PREM earth model. The computed vertical displacement has a weak correlation with the observed displacement as measured by the GNET GNSS station network. Both the computed and observed vertical movement show seasonal signals, however the computed signal has both a lower amplitude and different phase to the observed displacement. This could possibly be explained by the selection of the GNET stations used in the analysis or possibly the implementation of the non-tidal ocean and atmospheric pressure anomaly. Questions regarding the optimization of the processing within the model are discussed but remain open. Recommendations for further research into the complexity of the system and shortcomings of the model are discussed in detail. Subject Greenland ice sheetRACMO2.3modellingGNSSseasonal storagemelt water To reference this document use: http://resolver.tudelft.nl/uuid:36c4841c-e594-499d-8221-97ae5e47a133 Part of collection Student theses Document type student report Rights © 2019 Mark Bemelmans Files PDF Additional_Thesis_report_3_.pdf 4.38 MB Close viewer /islandora/object/uuid:36c4841c-e594-499d-8221-97ae5e47a133/datastream/OBJ/view