Head of Earth System ModellingResearch Department, Earth System Modelling Sectionpage tabs Profile Summary: Dr Nils P. Wedi joined ECMWF in 1995. He received his PhD degree from the Ludwig-Maximilians-Universität, München. His career at ECMWF encapsulates a diverse range of work both technical and scientific. He has been a Principal Scientist since 2010 and is the Head of Earth System Modelling at ECMWF that addresses all aspects of scientific and computational performance relating to ECMWF's forecast model and the ensemble forecasting system. He develops strategies to secure the scalability of the model on future high-performance computing systems. He is involved in a number of H2020 projects to address the challenge of rising energy costs for computing towards affordable, exascale high performance data assimilation and simulations of weather and climate at km-scale resolutions. Since 2021 he is the co-chair of the WMO Working Group on Numerical Experimentation (WGNE). Professional interests: Nils' interest is in numerical weather prediction and a widening perspective on relevant Earth system components such as atmosphere-land interactions and hydrology, oceans, waves, and sea-ice, with a broad expertise in numerical methods, atmospheric dynamics and physics, across scales from global to laboratory. He also has a special interest in aviation & weather forecasting. Career background: 2016- Head of Earth System Modelling 2013-2016 Head of the Numerical Aspects Section 2004-2013 Senior/Principal Scientist, ECMWF 2001-2004 PhD, Ludwig-Maximilians-Universität München, Germanysupervisor: Prof. Dr. U. Schumann, Prof. J. Egger external advisor: P. K. Smolarkiewicz 1995-2001 Analyst, ECMWF 1990-1995 Diplom, Johannes Gutenberg-Universität Mainz, Germanysupervisor: Prof. Dr. W. Zdunkowski External recognitions: 2021- co-Chair of the WMO WWRP/WCRP Working Group on Numerical Experimentation (WGNE) 2018- Member of the H2020 IMMERSE external expert Advisory Board 2015-2020 Member of the WMO JSC/CAS Working Group on Numerical Experimentation (WGNE) 2015-2020 Member in the working group ETP4HPC SRA Mathematics and Algorithms for extreme scale HPC systems 2015-2016 Member in the working group ETP4HPC SRA Energy and Resiliency 2010-2015 Executive Board Member of the Unified Model (UM) dynamical core project, which is part of the Next-Generation-Weather-and-Climate-Prediction (NGWCP) programme 2007- Expert member of the Short Range Numerical Weather Prediction (SRNWP) network “Dynamics and lateral boundary coupling” 2003-2008 Member of the Partnership for Research Infrastructures in Earth System Modelling (PRISM) Publications 2022Takafumi Kanehama, irina sandu, Anton Beljaars, Annelize van Niekerk, Nils Wedi, Souhail Boussetta, Simon Lang, Stephanie Johnson, Linus Magnusson (March 2022) Evaluation and optimizaton of orographic drag in the IFS, ECMWF Technical Memoranda n. 893. DOI: 10.21957/fps6gngqe Nils Wedi, Peter Bauer, Tiago Quintino (April 2022) From the Scalability Programme to Destination Earth, ECMWF Newsletter, issue 171, pp. 15-22. DOI: 10.21957/pb2vnp59ks 2021Inna Polichtchouk, Peter Bechtold, Massimo Bonavita, Richard Forbes, Sean Healy, Robin Hogan, Patrick Laloyaux, Michael Rennie, Timothy Stockdale, Nils Wedi, Michail Diamantakis, Johannes Flemming, Stephen English, Lars Isaksen, Filip Vána, Sonja Gisinger, Nicholas Byrne (January 2021) Stratospheric modelling and assimilation, ECMWF Technical Memoranda n. 877. DOI: 10.21957/25hegfoq Peter Düben, Umberto Modigliani, Alan Geer, Stephan Siemen, Florian Pappenberger, Peter Bauer, Andy Brown, Martin Palkovic, Baudouin Raoult, Nils Wedi, Vasileios Baousis (January 2021) Machine learning at ECMWF: A roadmap for the next 10 years, ECMWF Technical Memoranda n. 878. DOI: 10.21957/ge7ckgm 2020Peter Bauer, Tiago Quintino, Nils Wedi, Antonino Bonanni, Marcin Chrust, Willem Deconinck, Michail Diamantakis, Peter Düben, Stephen English, Johannes Flemming, Paddy Gillies, Ioan Hadade, James Hawkes, Mike Hawkins, Olivier Iffrig, Christian Kühnlein, Michael Lange, Peter Lean, Olivier Marsden, Andreas Müller, Sami Saarinen, Domokos Sarmany, Michael Sleigh, Simon Smart, PIOTR SMOLARKIEWICZ, Daniel Thiemert, Giovanni Tumolo, Christian Weihrauch, Cristiano Zanna, Pedro Maciel (February 2020) The ECMWF Scalability Programme: Progress and Plans, ECMWF Technical Memoranda n. 857. DOI: 10.21957/gdit22ulm 2019Inna Polichtchouk, Timothy Stockdale, Peter Bechtold, Michail Diamantakis, Sylvie Malardel, irina sandu, Filip Vána, Nils Wedi (June 2019) Control on stratospheric temperature in IFS: resolution and vertical advection, ECMWF Technical Memoranda n. 847. DOI: 10.21957/cz3t12t7e 2018Peter Düben, Michail Diamantakis, Simon Lang, Sami Saarinen, irina sandu, Nils Wedi, Tomas Wilhelmsson (October 2018) Progress in using single precision in the IFS, ECMWF Newsletter, issue 157, pp. 26-31. DOI: 10.21957/ps2y9gfa2d 2017irina sandu, Ayrton Zadra, Nils Wedi (2017) Impact of orographic drag on forecast skill, ECMWF newsletter, issue 150, pp. 18-24. DOI: 10.21957/icghjblyn7 Robin Hogan, Maike Ahlgrimm, Gianpaolo Balsamo, Anton Beljaars, P. Berrisford, Alessio Bozzo, Francesca Di Giuseppe, R.M. Forbes, Thomas Haiden, Simon Lang, Michael Mayer, I. Polichtchouk, irina sandu, Frederic Vitart, Nils Wedi (2017) Radiation in numerical weather prediction, ECMWF Technical Memoranda n. 816. DOI: 10.21957/2bd5dkj8x 2016Malardel S., Nils Wedi, Willem Deconinck, Michail Diamantakis, Christian Kühnlein, Mozdzynski G., Hamrud M., PIOTR SMOLARKIEWICZ (2016) A new grid for the IFS, ECMWF Newsletter, issue 146, pp. 23-28. DOI: 10.21957/zwdu9u5i Jean Bidlot, Luigi Cavaleri, Luciana Bertotti, Francesco Barbariol, Alvise Benetazzo, Peter A. E. M. Janssen, Nils Wedi (2016) What conditions led to the Draupner freak wave?, ECMWF Newsletter, issue 148, pp. 37-40. DOI: 10.21957/mgirfga3 2015Nils Wedi, Peter Bauer, Willem Deconinck, Michail Diamantakis, M. Hamrud, Christian Kühnlein, S. Malardel, Kristian S. Mogensen, G. Mozdzynski, PIOTR SMOLARKIEWICZ (2015) The modelling infrastructure of the Integrated Forecasting System: Recent advances and future challenges, ECMWF Technical Memoranda n. 760. DOI: 10.21957/thtpwp67e PIOTR SMOLARKIEWICZ, Willem Deconinck, Hamrud M., Christian Kühnlein, Mozdzynski G., Szmelter J., Nils Wedi (2015) An all-scale, finite-volume module for the IFS, ECMWF Newsletter, issue 145, pp. 24-29. DOI: 10.21957/f4gm176p 2014Gianpaolo Balsamo, Anna Agusti-Panareda, C. Albergel, Anton Beljaars, Souhail Boussetta, Emanuel Dutra, T. Komori, S.T.K. Lang, Joaquin Muñoz-Sabater, Florian Pappenberger, Patricia de Rosnay, irina sandu, Nils Wedi, Antje Weisheimer, Fredrik Wetterhall, Ervin Zsoter (October 2014) Representing the Earth surfaces in the Integrated Forecasting System: Recent advances and future challenges, ECMWF Technical Memoranda n. 729. DOI: 10.21957/tp28b09ds C. Albergel, Joaquin Muñoz-Sabater, Thomas Haiden, Gianpaolo Balsamo, Anton Beljaars, L. Isaksen, Patricia de Rosnay, irina sandu, Nils Wedi (November 2014) Soil temperature at ECMWF: an assessment using ground-based observations, ECMWF Technical Memoranda n. 735. DOI: 10.21957/xg3aylkvt 2013Saleh Abdalla, L. Isaksen, Peter A. E. M. Janssen, Nils Wedi (2013) Effective spectral resolution of ECMWF atmospheric forecast models, ECMWF Newsletter, issue 137, pp. 19-22. DOI: 10.21957/rue4o7ac Linus Magnusson, A.J. Thorpe, Massimo Bonavita, S.T.K. Lang, A. McNally, Nils Wedi (April 2013) Evaluation of forecasts for hurricane Sandy, ECMWF Technical Memoranda n. 699, pp. 28. DOI: 10.21957/b5nhw6qe1 2012Nils Wedi, Hamrud M., Mozdzynski G., Austad G., Curic S., Jean Bidlot (2012) Global, non-hydrostatic, convection-permitting, medium-range forecasts: progress and challenges, ECMWF Newsletter, issue 133, pp. 17-22. DOI: 10.21957/cequld5s Mark John Rodwell, Magnusson L., Peter Bauer, Peter Bechtold, Massimo Bonavita, Carla Cardinali, Michail Diamantakis, P. Earnshaw, Anotonio Garcia-Mendez, L. Isaksen, Källén E., Klocke D., Philippe Lopez, Tony McNally, Persson A., Fernando Prates, Nils Wedi (2012) A case study of occasional poor medium-range forecasts for Europe, ECMWF Newsletter, issue 131, pp. 16-24. DOI: 10.21957/ocaqy91i Mark John Rodwell, Magnusson L., Peter Bauer, Peter Bechtold, Carla Cardinali, Michail Diamantakis, Källén E., Klocke D., Philippe Lopez, Tony McNally, Persson A., Fernando Prates, Nils Wedi (2012) Characteristics of occasional poor medium-range forecasts for Europe, ECMWF Newsletter, issue 131, pp. 11-15. DOI: 10.21957/lnhbsxr4 2011K. Yessad, Nils Wedi (December 2011) The hydrostatic and non-hydrostatic global model IFS/ARPEGE: deep-layer model formulation and testing, ECMWF Technical Memorandum n. 657, pp. 26. DOI: 10.21957/8is8dmk08 2010Nils Wedi, Malardel S. (2010) Non-hydrostatic modelling at ECMWF, ECMWF Newsletter, issue 125, pp. 17-21. DOI: 10.21957/rzojr98e Mark John Rodwell, T. Jung, Peter Bechtold, P. Berrisford, Niels Bormann, Carla Cardinali, Laura Ferranti, Timothy Hewson, Franco Molteni, Nils Wedi, Magdalena A. Balmaseda, Gianpaolo Balsamo, Massimo Bonavita, Roberto Buizza, Mohamed Dahoui, Anotonio Garcia-Mendez, Martin Leutbecher, Philippe Lopez, Y. Trémolet, Frederic Vitart (October 2010) Developments in diagnostics research, ECMWF Technical Memoranda n. 637, pp. 49. DOI: 10.21957/tnuoos42a 2009Nils Wedi, PIOTR SMOLARKIEWICZ (October 2009) A nonlinear perspective on the dynamics of the MJO: idealized large-eddy simulations, ECMWF Technical Memorandum n. 602, pp. 26. DOI: 10.21957/0si4ddm8i Nils Wedi, K. Yessad, A. Untch (October 2009) The non-hydrostatic global IFS/ARPEGE model: model formulation and testing, ECMWF Technical Memorandum n. 594, pp. 34. DOI: 10.21957/tl4f0ao4t A. Orr, Nils Wedi (May 2009) The representation of non-orographic gravity waves in the IFS Part I: Assessment of the middle atmosphere climate with Rayleigh friction, ECMWF Technical Memorandum n. 592, pp. 15. DOI: 10.21957/45nr8vsb 2006Roberto Buizza, Jean Bidlot, Nils Wedi, Manuel Fuentes, Mats Hamrud, Graham Holt, Tim Palmer, Frederic Vitart (2006) The ECMWF Variable Resolution Ensemble Prediction System (VAREPS), ECMWF Newsletter, issue 108, pp. 14-20. DOI: 10.21957/st10ye392d Roberto Buizza, Jean Bidlot, Nils Wedi, Manuel Fuentes, M. Hamrud, G. Holt, T.N. Palmer, Frederic Vitart (July 2006) The new ECMWF Variable Resolution Ensemble Prediction System (VAREPS): methodology and validation., ECMWF Technical Memoranda n. 499, pp. 32. DOI: 10.21957/u29g10kaa 2003Nils Wedi, PIOTR SMOLARKIEWICZ (April 2003) Extending Gal-Chen and Somerville terrain-following coordinate transformation on time-dependent curvilinear boundaries, ECMWF Technical Memorandum n. 405, pp. 23. DOI: 10.21957/2xk2tyvy9 2002C. Brankovic, M.J. Miller, A. Untch, Nils Wedi (January 2002) Climate diagnostics of the ECMWF AMIP-2 simulations, ECMWF Technical Memorandum n. 360, pp. 38. DOI: 10.21957/atqy6q5a8 1999Nils Wedi (March 1999) The numerical coupling of the physical parametrizations to the dynamical equations in a forecast model, ECMWF Technical Memorandum n. 274, pp. 37. DOI: 10.21957/6gp4sgiys 1998Roberto Buizza, T. Petroliagis, T.N. Palmer, J. Barkmeijer, M. Hamrud, A. Hollingsworth, Adrian Simmons, Nils Wedi (January 1998) Impact of model resolution and ensemble size of the performance of an EnsemblePrediction System, ECMWF Technical Memorandum n. 245, pp. 31. DOI: 10.21957/z14fp38jq
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