Curriculum Vitae
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LE JOUR ET LA NUIT Idées Reçues Sur Le Folklore Et L’Animation Néo-Louvanistes
LE JOUR ET LA NUIT Idées reçues sur le folklore et l’animation néo-louvanistes À l’attention toute particulière des habitants de Louvain-la-Neuve et des nouveaux étudiants de l’Université catholique de Louvain. Where will your next step take you? The next step in your career is the big one. Are you looking for lots of options? Do you want to develop valuable skills? Make time for life outside work? Be part of a team culture that brings out the best in you? It’s your future. How far will you take it? Make the leap at www.careers.deloitte.com Une production ASBO Avec le soutient du GCL, de la Fédé, de l’AGL et de l’UCL © 2009 Deloitte Belgium Cette brochure est la réalisation d’un projet vieux de plusieurs années, ayant germé après de longs débats passionnés jalonnant nos vies d’étudiants impliqués dans le monde de l’animation néo-louvaniste, notam- ment au contact de Xavier Renders et de son cabinet du Vice-Rectorat aux Affaires étudiantes de l’UCL. Il aura finalement fallu 3 ans de recul pour relancer et concrétiser ce projet, basé entre autres sur le travail préliminaire de Christophe Petre et Nicolas Pitance. Mais ce projet n’aurait pas vu le jour si nous n’avions pas reçu un soutien massif de toutes parts. Remercions d’abord les personnes qui ont soutenu moralement cette initiative : l’Ordre Académique de Sainte Barbe, le GCL, la Fédé, l’AGL, l’Organe, le Vice-Rectorat aux Affaires étudiantes de l’UCL, et princi- palement Xavier Renders et Anne Van Laethem. -
The Belgian Contribution to Global 1968 Gerd Rainer Horn
The Belgian Contribution to Global 1968 Gerd Rainer Horn To cite this version: Gerd Rainer Horn. The Belgian Contribution to Global 1968. Views From Abroad : Foreign Historians on Belgium, special English-language issue of Revue Belge d’Histoire Contemporaine, 2005, pp.597- 635. hal-01020652 HAL Id: hal-01020652 https://hal-sciencespo.archives-ouvertes.fr/hal-01020652 Submitted on 8 Jul 2014 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. The Belgian Contribution to Global 1968 GERD-RAINER HORN ____Senior Lecturer in 20th Century History, Department of History – University of Warwick The calendar year of 1968 is almost universally associated with student un- rest. Belgium fits into this picture rather well, with major student mobilisa- tions in Leuven and Brussels occurring in the first half of that notoriously restless calendar year.1 Yet all-inclusive assessments of the social movements and political reconfigurations happening that year, not only in Belgium but elsewhere in Europe and North America as well, must go beyond the rela- tively narrow confines of university student milieus. For the purposes of this essay, I propose also to address fresh developments occurring within the worlds of labor and cultural productions. -
2010GM000935-SE-Pattyn 27..44
Antarctic Subglacial Lake Discharges Frank Pattyn Laboratoire de Glaciologie, Département des Sciences de la Terre et de l’Environnement Université Libre de Bruxelles, Brussels, Belgium Antarctic subglacial lakes were long time supposed to be relatively closed and stable environments with long residence times and slow circulations. This view has recently been challenged with evidence of active subglacial lake discharge under- neath the Antarctic ice sheet. Satellite altimetry observations witnessed rapid changes in surface elevation across subglacial lakes over periods ranging from several months to more than a year, which were interpreted as subglacial lake discharge and subsequent lake filling, and which seem to be a common and widespread feature. Such discharges are comparable to jökulhlaups and can be modeled that way using the Nye-Röthlisberger theory. Considering the ice at the base of the ice sheet at pressure melting point, subglacial conduits are sustainable over periods of more than a year and over distances of several hundreds of kilo- meters. Coupling of an ice sheet model to a subglacial lake system demonstrated that small changes in surface slope are sufficient to start and sustain episodic subglacial drainage events on decadal time scales. Therefore, lake discharge may well be a common feature of the subglacial hydrological system, influencing the behavior of large ice sheets, especially when subglacial lakes are perched at or near the onset of large outlet glaciers and ice streams. While most of the observed discharge events are relatively small (101–102 m3 sÀ1), evidence for larger subgla- cial discharges is found in ice free areas bordering Antarctica, and witnessing subglacial floods of more than 106 m3 sÀ1 that occurred during the middle Miocene. -
Results of the Third Marine Ice Sheet Model Intercomparison Project (MISMIP+)
The Cryosphere, 14, 2283–2301, 2020 https://doi.org/10.5194/tc-14-2283-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Results of the third Marine Ice Sheet Model Intercomparison Project (MISMIP+) Stephen L. Cornford1, Helene Seroussi2, Xylar S. Asay-Davis3, G. Hilmar Gudmundsson4, Rob Arthern5, Chris Borstad6, Julia Christmann7, Thiago Dias dos Santos8,9, Johannes Feldmann10, Daniel Goldberg11, Matthew J. Hoffman3, Angelika Humbert7,12, Thomas Kleiner7, Gunter Leguy13, William H. Lipscomb13, Nacho Merino14, Gaël Durand14, Mathieu Morlighem8, David Pollard15, Martin Rückamp7, C. Rosie Williams5, and Hongju Yu8 1Centre for Polar Observation and Modelling, Department of Geography, Swansea University, Swansea, UK 2Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA 3Los Alamos National Laboratory, Los Alamos, NM, USA 4Faculty of Engineering and Environment, Northumbria University, Newcastle, UK 5British Antarctic Survey, Cambridge, UK 6Department of Civil Engineering, Montana State University, Bozeman, MT, USA 7Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany 8Department of Earth System Science, University of California, Irvine, Irvine, CA, USA 9Centro Polar e Climático, Universidade Federal do Rio Grande do Sul, Porto Alegre RS, Brazil 10Potsdam Institute for Climate Impact Research, Potsdam, Germany 11Institute of Geography, University of Edinburgh, Edinburgh, UK 12Faculty of Geosciences, University of Bremen, Bremen, Germany 13Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, USA 14Université Grenoble Alpes, CNRS, IRD, IGE, Grenoble, France 15Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, USA Correspondence: Stephen L. Cornford ([email protected]) Received: 30 December 2019 – Discussion started: 20 January 2020 Revised: 7 May 2020 – Accepted: 21 May 2020 – Published: 21 July 2020 Abstract. -
EGU2010-2038, 2010 EGU General Assembly 2010 © Author(S) 2010
Geophysical Research Abstracts Vol. 12, EGU2010-2038, 2010 EGU General Assembly 2010 © Author(s) 2010 On the use of the unstable manifold correction in a Picard iteration for the solution of the velocity field in higher-order ice-flow models Bert De Smedt (1), Frank Pattyn (2), and Pieter de Groen (3) (1) Department of Geography and Earth System Science, DGGF-WE, Vrije Universiteit Brussel, Brussels, Belgium ([email protected], +32 (0)262933 78), (2) Laboratoire de Glaciologie, CP 160/03, Faculté de Sciences, Université Libre de Bruxelles, Brussels, Belgium, (3) Department of Mathematics, DWIS-WE, Vrije Universiteit Brussel, Brussels, Belgium Nonlinear iteration schemes are essential for a fast and stable solution of higher-order ice-flow models (HOIFM’s). This topic is gaining momentum as now also ice-sheet models are planned to include higher-order mechanics. In 1996, Hindmarsh and Payne proposed the unstable manifold correction as a way to stabilise the numerical solution of implicit finite-difference discretisations of the time-dependent thickness-evolution equation for ice flow. Since 2002, Pattyn (e.g. Pattyn (2002), Pattyn (2003)) has been using the unstable manifold correction in a Picard iteration to facilitate the solution of the velocity field in HOIFM’s. In more recent work, a variant of the original algorithm was used (e.g. Pattyn and others, 2004). Although this variant usually enables a relatively fast solution, it is theoretically less sound. Using a new 2D HOIFM implementation, we show that, in most cases, there is no need for the unstable manifold correction or its variant in a Picard iteration. -
Pattyn2010 EPSL.Pdf
Earth and Planetary Science Letters 295 (2010) 451–461 Contents lists available at ScienceDirect Earth and Planetary Science Letters journal homepage: www.elsevier.com/locate/epsl Antarctic subglacial conditions inferred from a hybrid ice sheet/ice stream model Frank Pattyn Laboratoire de Glaciologie, Département des Sciences de la Terre et de l'Environnement, CP160/03, Université Libre de Bruxelles, Av. F.D. Roosevelt 50, B-1050 Brussels, Belgium article info abstract Article history: Subglacial conditions of large polar ice sheets remain poorly understood, despite recent advances in satellite Received 15 October 2009 observation. Major uncertainties related to basal conditions, such as the temperature field, are due to an Received in revised form 9 April 2010 insufficient knowledge of geothermal heat flow. Here, a hybrid method is presented that combines numerical Accepted 12 April 2010 modeling of the ice sheet thermodynamics with a priori information using a simple assimilation technique. Available online 18 May 2010 Additional data are essentially vertical temperature profiles measured in the ice sheet at selected spots, as Editor: M.L. Delaney well as the distribution of subglacial lakes. In this way, geothermal heat-flow datasets are improved to yield calculated temperatures in accord with observations in areas where information is available. Results of the Keywords: sensitivity experiments show that 55% of the grounded part of the Antarctic ice sheet is at pressure melting Antarctic ice sheet point. Calculated basal melt rates are approximately 65 Gt year−1, which is 3% of the total surface numerical modeling accumulation. Although these sensitivity experiments exhibit small variations in basal melt rates, the impact subglacial temperature on the ice age of basal layers is quite important. -
Dynamic Influence of Pinning Points on Marine Ice-Sheet Stability: a Numerical Study in Dronning Maud Land, East Antarctica
The Cryosphere, 10, 2623–2635, 2016 www.the-cryosphere.net/10/2623/2016/ doi:10.5194/tc-10-2623-2016 © Author(s) 2016. CC Attribution 3.0 License. Dynamic influence of pinning points on marine ice-sheet stability: a numerical study in Dronning Maud Land, East Antarctica Lionel Favier, Frank Pattyn, Sophie Berger, and Reinhard Drews Laboratoire de Glaciologie, DGES, Université libre de Bruxelles, Brussels, Belgium Correspondence to: Lionel Favier ([email protected]) Received: 6 June 2016 – Published in The Cryosphere Discuss.: 16 June 2016 Revised: 26 September 2016 – Accepted: 22 October 2016 – Published: 9 November 2016 Abstract. The East Antarctic ice sheet is likely more sta- 1 Introduction ble than its West Antarctic counterpart because its bed is largely lying above sea level. However, the ice sheet in Dron- The marine ice-sheet instability (MISI) (Weertman, 1974; ning Maud Land, East Antarctica, contains marine sectors Thomas and Bentley, 1978) hypothesis states that a marine that are in contact with the ocean through overdeepened ma- ice sheet with its grounding line – the boundary between rine basins interspersed by grounded ice promontories and grounded and floating ice – resting on an upsloping bed to- ice rises, pinning and stabilising the ice shelves. In this pa- wards the sea is potentially unstable. A prior retreat of the per, we use the ice-sheet model BISICLES to investigate the grounding line (e.g. ocean-driven) resting on such an up- effect of sub-ice-shelf melting, using a series of scenarios sloping bed thickens the ice at the grounding line, which in- compliant with current values, on the ice-dynamic stability of creases the ice flux and induces further retreat, etc., until a the outlet glaciers between the Lazarev and Roi Baudouin ice downsloping bed is reached, provided that upstream snow- shelves over the next millennium. -
Ice Sheet Mass Balance and Sea Level
Portland, Oregon, USA 14 July 2012 ISMASSISMASS 20122012 WorkshopWorkshop IceIce SheetSheet MassMass BalanceBalance andand SeaSea LevelLevel Edward Hanna Francisco Navarro Frank Pattyn OrganizersOrganizers andand sponsorssponsors Organizing and sponsoring: Scientific Committee on Antartic Research (SCAR) International Arctic Science Committee (IASC) World Climate Research Programme (WCRP) with organizing support from WCRP/CliC & APECS Sponsoring: International Council of Scientific Unions (ICSU) International Glaciological Society (IGS) Internat. Association of Cryospheric Sciences (IACS) ISMASSISMASS SteeringSteering CommitteeCommittee From SCAR Buenos Aires 2010 Meeting till autumn 2011: Kees van der Veen, University of Kansas. Christina Hulbe, Portland State University. Francisco Navarro, Technical University of Madrid. Under co-sponsorship of SCAR & IASC, from autumn 2011 till present, interim SC: Frank Pattyn, Un. Libre Bruxelles (representing SCAR). Francisco Navarro, TU Madrid (representing IASC). Edward Hanna, Univ. Sheffield (representing WCRP). ISMASSISMASS 20122012 WorkshopWorkshop aimsaims To assess the current knowledge of the contribution of the Antarctic and Greenland Ice Sheets to SLR (focus on quantifying uncertainties and understanding discrepancies). To analyze how model-based predictions of ice-sheet discharge and melting contributions to sea-level changes can be improved (emphasis on identifying shortcomings and suggesting improvements, and on interactions with oceans and atmosphere). To study other -
Ottignies Louvain-La-Neuve
POCKET- SIZED EN LOUVAIN- LA-NEUVE HISTORY CULTURE NATURE STROLLING DISCOVERY WALK EVENTS UNIVERSITY CITY PRACTICAL SYNOPSIS INTRODUCTION A NEW TOWN 4 A NEW TOWN Located in the heart of the Walloon Brabant province, 32 6 A BIT OF HISTORY kilometres south of Brussels, Ottignies-Louvain-la-Neuve has One day to two town centres. The historical centre of Ottignies nestles 8 DISCOVER THE CULTURE in the heart of the beautiful surrounding countryside, which has been enriched in terms of culture and tourism by the 10 One day to construction of the new city, creating a new centre: CONNECT WITH NATURE Louvain-la-Neuve. 12 One day to A true university city, Louvain-la-Neuve sits harmoniously in STROLL AROUND the surrounding landscape. From its very beginnings, the city was modelled on Italian medieval towns and with the 14 DISCOVERY WALK idea of general accessibility. The town centre is a comple- 18 THE BIG ANNUAL EVENTS tely pedestrian area and bubbling with life, with a distinc- tive, friendly atmosphere. It is a unique example of urban 19 A UNIVERSITY CITY creation which combines country charm with all the advan- 21 GOOD CONNECTIVITY TIPS tage of a modern city! 22 PRACTICAL INFO 5 REASONS TO COME AND VISIT US AN ACCESSIBLE TOWN 23 at the Office du Tourisme-Inforville 3 201 OTTIGNIES-LOUVAIN-LA-NEUVE, LAURÉAT EUROPEAN DESTINATION OF EXCELLENCE Pictogram captions The city has been designed for all its visitors, young and not so young, able-bodied and less so. It is for this reason, Good Tips « I love my city.. -
Ice Sheet Mass Balance and Sea Level (ISMASS) 2018-2020 Report
SCAR Sub-Group ISMASS SG PS Person Frank Pattyn Responsible: SCAR Delegates Report 2020 Ice Sheet Mass Balance and Sea Level (ISMASS) 2018-2020 Report Summary Report Author(s) Frank Pattyn ([email protected]) - BELGIUM, Catherine Ritz ([email protected]) - FRANCE, Guðfinna Aðalgeirsdóttir ([email protected]) – ICELAND, Edward Hanna ([email protected]) – UK Heiko Goelzer ([email protected]) – THE NETHERLANDS (Proposed to take the lead of ISMASS, to be discussed at the coming SC) Summary of activities from 2018-20 ISMASS organized a one-day workshop on 15 June 2018 as a side meeting of the SCAR Open Conference in Davos, entitled “Update on mass balance of Greenland and Antarctica (linkages between data and models)”. A review article came out of this workshop: Hanna, E., F. Pattyn, F. Navarro, V. Favier, H. Goelzer, M.R. van den Broeke, M. Vizcaino, P.L. Whitehouse, C. Ritz, K. Bulthuis, B. Smith (2020) Mass balance of the ice sheets and glaciers - progress since AR5 and challenges. Earth Science Reviews. 201, doi: 10.1016/j.earscirev.2019.102976. ISMASS is dedicated to both Arctic and Antarctic science and is supported by SCAR, CliC, and IASC. The following information does not directly concern Antarctica but Greenland. However, the tools are common for both ice sheets. ISMASS promoted an intercomparison project (SMBMIP, also in the framework of ISMIP6) which is being led by Dr. Xavier Fettweis (University of Liege, Belgium; [email protected] and ISMASS member) and has recently evaluated regional climate model (RCM), positive degree day (PDD) and global climate model (GCM) estimates of surface mass balance (SMB) for the Greenland Ice Sheet, with the goal of forcing ice sheet models with reconciled information from SMB models. -
Basal and Thermal Control Mechanisms of the Ragnhild Glaciers, East Antarctica
Annals of Glaciology 40 2005 225 Basal and thermal control mechanisms of the Ragnhild glaciers, East Antarctica Frank PATTYN, Sang DE BRABANDER, Ann HUYGHE Department of Geography, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium E-mail: [email protected] ABSTRACT. The Ragnhild glaciers are three enhanced-flow features situated between the Sør Rondane and Yamato Mountains in eastern Dronning Maud Land, Antarctica. We investigate the glaciological mechanisms controlling their existence and behavior, using a three-dimensional numerical thermo- mechanical ice-sheet model including higher-order stress gradients. This model is further extended with a steady-state model of subglacial water flow, based on the hydraulic potential gradient. Both static and dynamic simulations are capable of reproducing the enhanced ice-flow features. Although basal topography is responsible for the existence of the flow pattern, thermomechanical effects and basal sliding seem to locally soften and lubricate the ice in the main trunks. Lateral drag is a contributing factor in balancing the driving stress, as shear margins can be traced over a distance of hundreds of kilometers along west Ragnhild glacier. Different basal sliding scenarios show that central Ragnhild glacier stagnates as west Ragnhild glacier accelerates and progressively drains the whole catchment area by ice and water piracy. INTRODUCTION Norwegian maps and 1960 Belgian maps permitted Nishio The East Antarctic ice sheet is traditionally considered a and others (1984) to determine the horizontal movement of stable feature characterized by slow-moving interior ice with the ice-shelf front along the Princess Ragnhild Coast. drainage through ice shelves across a grounding line and by Derwael Ice Rise is situated directly in front of WRG, so a few faster-moving outlet glaciers. -
Simulating Ice Processes Using the Finite Element, Unstructured, Adaptive Model Fluidity
Imperial College London Doctoral Thesis Simulating Ice Processes using the Finite Element, Unstructured, Adaptive Model Fluidity Author: Supervisor: Simon Mouradian Dr. Matthew Piggott A thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the Applied Modelling and Computation Group Department of Earth Science and Engineering February 2015 Declaration of Authorship I, Simon Mouradian, declare that this thesis titled, 'Simulating Ice Processes using the Finite Element, Unstructured, Adaptive Model Fluidity' and the work presented in it are my own. I confirm that: This work was done wholly or mainly while in candidature for a research degree at this University. Where any part of this thesis has previously been submitted for a degree or any other qualification at this University or any other institution, this has been clearly stated. Where I have consulted the published work of others, this is always clearly attributed. Where I have quoted from the work of others, the source is always given. With the exception of such quotations, this thesis is entirely my own work. I have acknowledged all main sources of help. Where the thesis is based on work done by myself jointly with others, I have made clear exactly what was done by others and what I have contributed myself. Signed: Date: 2 \When you set sail for Ithaca, wish for the road to be long, full of adventures, full of knowledge." C.P. Cavafy The copyright of this thesis rests with the author and is made available under a Creative Commons Attribution Non{Commercial No Derivatives licence. Researchers are free to copy, distribute or transmit the thesis on the condition that they attribute it, that they do not use it for commercial purposes and that they do not alter, transform or build upon it.