@article {Simula.simula.660,
	title = {On the Fly Visualization of Multilayer Geoscientific Datasets Using 4DPlates},
	journal = {Computers \& Geosciences},
	volume = {47},
	number = {1},
	year = {2012},
	month = {August},
	pages = {46-51},
	publisher = {Elsevier},
	abstract = {This paper presents the 4DPlates, an application designed to display high resolution data and reconstruct their positions in the geologic past. 4DPlates makes use of level of detail (LoD) grids with a 4-8 tree structure to store the data so only the require resolution for a particular viewpoint is used. This facility means that the user can interact with large data sets on the fly, achieving between 30 and 50 frames per second with a large test data set. The article presents the design and functionality of the application, from view-dependent visualization to the ability to reconstruct data in the distant past. Finally, we apply the application in two geoscientific settings. In the first, we calculate the tectonic subsidence from sediment loading and test the variation of the sediment density to the resulting subsidence grid. Secondly, we examine two South Atlantic reconstructions and highlight minor differences between them visible in the closeness of the fit of the topographic grids. The application excels at providing an interactive manipulation of high resolution data, whether it be reconstructing the data, setting the lighting angle or vertical exaggeration, or modifying parameters in the underlying formulas.},
	doi = {10.1016/j.cageo.2012.03.015},
	author = {Clark, Stuart and Skogseid, Jakob and Smethurst, Mark and Tarrou, Christian and Trond Vidar {Stensby} and Are Magnus {Bruaset} and Allison K. {Thurmond}}
}
@misc {Simula.simula.1646,
	title = {Plate Reconstruction of the Western Mediterranean: Derived Age-Grid and Residual Topography},
	howpublished = {  },
	year = {2012},
	month = {December},
	abstract = {The Western Mediterranean area is characterized by a collage of small tectonic plates trapped between the converging African and Eurasian plates. The rotation of these blocks was synchronous with the subduction of old oceanic crust and the opening of the present basins by back-arc extension. Multiple plate reconstruction models have been proposed for this region. Estimating the robustness and limitations of each model is important for better refining both regional and global models of plate motion. In this study, we examine four of the Western Mediterranean plate models (NGU 2010, Earthbyte 2012, Paleomap 2008, and Rosenbaum 2002), and we evaluate their consistency with geological and geophysical constraints. We focus on the timings of the onsets and endings of block motions, the relative chronology of the opening of back-arc basins, and the paleo-positions of blocks. This evaluation allows us to derive an alternative plate model that best satisfies the available geological and geophysical constraints. Based on plate flow-lines for the new model, an oceanic crust age-grid has been generated. This age-grid was used to estimate the residual topography in the Western Mediterranean.},
	keywords = {Conference},
	author = {Said, Aymen and Smethurst, Mark and Clark, Stuart and Moder, Christoph and Skogseid, Jakob}
}
@misc {Simula.simula.616,
	title = {Geological Modelling},
	year = {2010},
	author = {Are Magnus {Bruaset} and Tarrou, Christian and Trond Vidar {Stensby} and Skogseid, Jakob}
}
@misc {Simula.cg.16,
	title = {Microplate Modeling of the Afar Depression Using 4D Lithospheric Model (4DLM) and Splates: Implications for Development of Plate Boundaries},
	howpublished = {Talk given at Geological Society of America},
	year = {2010},
	month = {April},
	abstract = {Global plate models of the Afar Depression adopt a classic rift-rift-rift triple junction where the Arabian, Somali and Nubian (African) plates are separated by the Red Sea, the Gulf of Aden and the Main Ethiopian Rift. However, at the regional scale the kinematics are more complex due to stepping of the Red Sea (the SE-propagating Red Sea propagator) and the Gulf of Aden (the NW-propagating Gulf of Aden propagator) onto Afar as well as the presence of three \&ldquo;micro-plates\&rdquo; within Afar - the Danakil, Ali Sabieh and East Central Block. In addition, the East Central Block, which is enclosed between the Red Sea and the Gulf propagators, is fragmenting into six horst entities separated by NW-trending grabens. Mostly, the source of deformation within the East Central Block is its clockwise rotation (14 degrees in the last \~2 Ma) due to differential spreading across the Red Sea and the Gulf of Aden propagators. The exact location of the plate boundary between the Arabian and African plates within Afar is not well defined; however it is thought to be within the East Central Block. This boundary contains NW-trending extensional structures forming right-stepping grabens and transfer zones. The Dobe graben within the East Central Block has beta values much higher (\~1.66) than those reported from the Red Sea propagator (\~1.1) suggesting that extension has transferred from the overlapping propagators to the overlap zone. Poles and angles of rotation from published literature were modified and used to model the separation of Arabian, Somali, and Nubian plates in the 4D Lithospheric Model (4DLM) and SPlates software applications. The relative motions of the Danakil, Ali Sabieh and East Central Blocks, and the horst blocks are constructed, and rotation values based on literature and remote sensing analysis are adopted for the current model. Flow lines from 4DLM are used to establish the spatial and temporal relationship between conjugate plates, micro-plates and horst blocks. The associated age and rate of extension suggest a rather distinct \&ldquo;deformation pathway\&rdquo; through the Data Yager Hanle-Dobe Graben basins that is characterized by oldest onset of rifting as well as the highest rate of extension. It is proposed here that this pathway defines the potential geographic location of the plate boundary between Arabia and Africa within Afar.},
	author = {Helen Carrie {Bender} and Thurmond, Allison and Skogseid, Jakob and Clark, Stuart}
}
@inproceedings {Simula.SC.18,
	title = {Parallelisation and Numerical Performance of a 3D Model for Coupled Deformation, Fluid Flow and Heat Transfer in Sedimentary Basins},
	journal = {MekIT{\textquoteright}07. Fourth National Conference on Computational Mechanics},
	year = {2007},
	month = {May},
	pages = {151-162},
	publisher = {Tapir Academic Press},
	type = {Conference},
	address = {Trondheim},
	abstract = {In this paper, we present some parallel performance results for a 3D simulator of coupled deformation, fluid flow and heat transfer in sedimentary basins. The model parameters are derived from an industry simulator, with realistic material properties and complex irregular grids of up to 1.5 million nodes with 7.3 million degrees of freedom. We have performed parallelisation on the linear algebra level using the ML algebraic multigrid preconditioner with iterative methods in the Diffpack finite element framework. Implementation and speedup results are presented.},
	isbn = {978-82-519-2235-7},
	author = {Joachim Berdal {Haga} and Are Magnus {Bruaset} and Cai, Xing and Hans Petter {Langtangen} and Osnes, Harald and Skogseid, Jakob},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@misc {Simula.SC.101,
	title = {Parallelisation and Numerical Performance of a 3D Model for Coupled Deformation, Fluid Flow, and Heat Transport in Porous Geological Formations},
	howpublished = {Talk at the Fourth National Conference on Computational Mechanics (MekIT{\textquoteright}07), Trondheim, Norway},
	year = {2007},
	note = {Presented by J. B. Haga},
	month = {may},
	abstract = {In this paper, we present some parallel performance results for a 3D simulator of coupled deformation, fluid flow and heat transfer in sedimentary basins. The model parameters are derived from an industry simulator, with realistic material properties and complex irregular grids of up to 1.5 million nodes with 7.3 million degrees of freedom. We have performed parallelisation on the linear algebra level using the ML algebraic multigrid preconditioner with iterative methods in the Diffpack finite element framework. Implementation and speedup results are presented.},
	author = {Joachim Berdal {Haga} and Are Magnus {Bruaset} and Cai, Xing and Hans Petter {Langtangen} and Osnes, Harald and Skogseid, Jakob}
}
@article {SC.4.Kjeldstad.2003,
	title = {Differential Loading by Prograding Sedimentary Wedges on Continental Margin: an Arch Forming Mechanism},
	journal = {Journal of Geophysical Research},
	volume = {108},
	number = {B1},
	year = {2003},
	pages = {2036},
	author = {Kjeldstad, A. and Skogseid, Jakob and Hans Petter {Langtangen} and Bj{\o}rlykke, K.}
}
@inbook {SC.5.Kjeldstad.2003,
	title = {Simulation of Sedimentary Basins},
	booktitle = {Advanced Topics in Computational Partial Differential Equations - Numerical Methods and Diffpack Programming},
	series = {Lecture Notes in Computational Science and Engineering},
	year = {2003},
	pages = {611-658},
	publisher = {Springer},
	organization = {Springer},
	chapter = {15},
	author = {Kjeldstad, A. and Hans Petter {Langtangen} and Skogseid, Jakob and Bj{\o}rlykke, K.},
	editor = {Hans Petter {Langtangen} and Tveito, Aslak}
}
