PDEs on the Sphere 2025

12-16 May 2025 São Paulo (Brazil)

Program and Abstracts

Week Mon. 12 Tue. 13 Wed. 14 Thu. 15 Fri. 16 List

	Mon. 12	Tue. 13	Wed. 14	Thu. 15	Fri. 16
08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00	Welcome Coffee 8:00 - 8:45 (45min) Welcome Coffee Auditório Jacy Monteiro Welcome Talk 8:45 - 9:00 (15min) Welcome Talk Relevant information regarding event logistics. Equation sets 9:00 - 10:30 (1h30) Equation sets Auditório Jacy Monteiro › Thermodynamic consistency and energy conservation for the multiphase moist compressible Euler equations - Dave Lee, Bureau of Meteorology 09:00-09:30 (30min) › Exploring a Convolution-Based Self Attraction and Loading Technique for the Ocean Model MOM6 - Anthony Chen, University of Michigan 09:30-10:00 (30min) › Multiscale numerical methods for geoscientific subgrid-scale process representation - Joern Behrens, Universitaet Hamburg 10:00-10:30 (30min) Coffee break 10:30 - 11:00 (30min) Coffee break Auditório Jacy Monteiro Equation sets 11:00 - 12:30 (1h30) Equation sets Auditório Jacy Monteiro › About the spherical and ellipsoidal geopotential approximation and first results with a Discontinuous Galerkin dynamical core - Michael Baldauf, Deutscher Wetterdienst 11:00-11:30 (30min) › A novel deep-atmosphere variant of the HOMME dynamical core for the E3SM climate model - Owen Hughes, Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor 11:30-12:00 (30min) › Exploring Non-Hydrostatic Effects in ECMWF's IFS: Stability, Accuracy, and Forecast Skill at Kilometer-Scale Resolutions - Jozef Vivoda, European Centre for Medium-Range Weather Forecasts (online) 12:00-12:30 (30min) Lunch 12:30 - 14:00 (1h30) Lunch Restaurants Spatial discretization 14:00 - 15:30 (1h30) Spatial discretization Auditório Jacy Monteiro › Spherical Harmonics Least Square approximation on the Cubed-Sphere grid - Matthieu Brachet, Laboratoire de mathématiques et applications (online) 14:00-14:30 (30min) › A dynamical core for global atmospheric model using summation-by-parts finite-differences method - Vladimir Shashkin, G.I. Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences [Moscow], Hydrometcentre of Russia, [Moscow] 14:30-15:00 (30min) › Robust discontinuous Galerkin models for atmospheric dynamics using non-conforming mesh refinement - Tommaso Benacchio, Weather Research, Danish Meteorological Institute, Denmark 15:00-15:30 (30min) Coffee break 15:30 - 16:00 (30min) Coffee break Auditório Jacy Monteiro Spatial discretization 16:00 - 17:00 (1h) Spatial discretization Auditório Jacy Monteiro › Analysis of finite-volume transport schemes on cubed-sphere grids and an accurate scheme for divergent winds - Luan Santos, Cooperative Institute for Modeling the Earth System, Princeton University 16:30-17:00 (30min) › A Sparse Grid Hexagonal Grid on the sphere based on the L-Galerkin approach o2o2 - Jurgen Steppeler (University Bonn) 16:30-17:00 (30min) Happy Hour 18:30 - 21:00 (2h30) Happy Hour	Test cases 9:00 - 10:30 (1h30) Test cases Auditório Jacy Monteiro › New Idealized Test Cases for the Dynamical Cores of General Circulation Models - Christiane Jablonowski, University of Michigan 09:00-09:30 (30min) › A minimal adiabatic example of sudden stratospheric warming - Joseph Mouallem, Atmospheric and Oceanic Sciences Program, Princeton University 09:30-10:00 (30min) › Third-Order, Adaptively Implicit Time Stepping for Advection Enabling Long Time Steps - Amber Te Winkel, University of Reading 10:00-10:30 (30min) Coffee break 10:30 - 11:00 (30min) Coffee break Auditório Jacy Monteiro Time discretization & integration 11:00 - 12:30 (1h30) Time discretization & integration Auditório Jacy Monteiro › Accuracy analysis and improvement of a semi-Lagrangian exponential integration method for the shallow-water equations on the rotating sphere - Joao Guilherme Caldas Steinstraesser, Institute of Mathematics and Statistics - University of São Paulo 11:00-11:30 (30min) › Stability analyses of divergence and vorticity damping on cubed-sphere grids - Timothy Andrews, University of Michigan 11:30-12:00 (30min) › Interesting features of the dynamical core of CCAM - John McGregor, CSIRO Environment, Melbourne 12:00-12:30 (30min) Lunch 12:30 - 14:00 (1h30) Lunch Restaurants Spatial discretization 14:00 - 15:30 (1h30) Spatial discretization Auditório Jacy Monteiro › Sub-spherical harmonics - Laplacian eigenfunctions of the sub-domains on the sphere - Janakiraman Subburathnam, Centre for Development of Advanced Computing, Bangalore (online) 14:00-14:30 (30min) › Splitting horizontal and vertical element order in a compatible finite element discretisation - Daniel Witt, Univeristy of Exeter 14:30-15:00 (30min) › Improving the accuracy of TRiSK-type schemes - Eldred Christopher, Sandia National Laboratories [Albuquerque] 15:00-15:30 (30min) Coffee break 15:30 - 16:00 (30min) Coffee break Auditório Jacy Monteiro MONAN (Model for Ocean-laNd-Atmosphere PredictioN) 16:00 - 16:30 (30min) MONAN (Model for Ocean-laNd-Atmosphere PredictioN) Auditório Jacy Monteiro Pedro Dias (University of São Paulo)	Related Topics 8:30 - 10:00 (1h30) Related Topics Auditório Jacy Monteiro › A scalable ADER-DG transport method with a polynomial-order-independent CFL limit for efficient high-order simulations - Kieran Ricardo, The Australian National University (Online) 08:30-09:00 (30min) › Ekman Transport on a sphere - Nathan Paldor, Fredy and Nadine Herrmann Institute of Earth Sciences, The Hebrew University of Jerusalem 09:00-09:30 (30min) › pyBELLA+: An idealised laboratory testbed for investigating novel NWP applications - Ray Chew, California Institute of Technology, Freie Universität Berlin, Goethe-Universität Frankfurt am Main 09:30-10:00 (30min) Coffee break 10:00 - 10:30 (30min) Coffee break Auditório Jacy Monteiro Poster (Flash Talks) 10:30 - 11:40 (1h10) Poster (Flash Talks) Auditório Jacy Monteiro › A robust high-order finite volume method for advection on geodesic spherical grids. - Jeferson Granjeiro, Institute of Mathematics and Statistics - University of São Paulo 10:30-10:37 (07min) › Assessment and sensitivity studies of Numerical Weather Prediction Models during Catastrophic Flooding in Rio Grande do Sul - Ariane Frassoni, National Institute for Space Research [Sao José dos Campos] = Instituto Nacional de Pesquisas Espaciais 10:37-10:44 (07min) › Data Assimilation Using Generative Adversarial Networks for Global Models - Otavio Feitosa, CEMPA Cerrado, Instituto Nacional de Pesquisas Espaciais - Haroldo Velho, Instituto Nacional de Pesquisas Espaciais 10:51-10:58 (07min) › Exploring grid and nudging strategies for wind energy assessment in the Model for Prediction Across Scales - Guilherme Torres Mendonça, Institute of Mathematics and Statistics - University of São Paulo 10:58-11:05 (07min) › High-order Hodge Stars Operators for Discrete Exterior Calculus on Voronoi-Delaunay Biperiodic Meshes - João Gomes, Institute of Mathematics and Statistics [Sao Paulo] 11:05-11:12 (07min) › Nonlinear wave interactions in shallow water equations on the sphere - Marco Dourado, Instituto de Matemática e Estatística 11:12-11:19 (07min) Group Photo Poster (Flash Talks) 11:30 - 11:30 () Group Photo Group Photo Lunch 11:40 - 13:10 (1h30) Lunch Restaurants Tour to Parque Estadual Cantareira - Pedra Grande 13:20 - 18:00 (4h40) Tour to Parque Estadual Cantareira - Pedra Grande TBD	Machine learning 9:00 - 10:30 (1h30) Machine learning Auditório Jacy Monteiro › Modeling global surface dust deposition using physics-informed neural networks - Elwin Van 't Wout, Institute for Mathematical and Computational Engineering, Pontificia Universidad Católica de Chile 09:00-09:30 (30min) › Leveraging machine learning for improved numerical weather prediction through large-scale spectral nudging - Syed Zahid Husain, Environment and Climate Change Canada 09:30-10:00 (30min) › Hybrid Models for Extreme Meteorological Events - Haroldo Campos Velho, National Institute for Space Research 10:00-10:30 (30min) Coffee break 10:30 - 11:00 (30min) Coffee break Auditório Jacy Monteiro Machine learning 11:00 - 12:30 (1h30) Machine learning Auditório Jacy Monteiro › Satellite Data Assimilation by EnKF and Cellular Neural Network for Global models - Cesar Magno Oliveira Junior, Universidade de São Paulo 11:00-11:30 (30min) › Deep Learning for Super-Resolution in ICON-O - Fabricio Rodrigues Lapolli, Max-Planck-Institut für Meteorologie 11:30-12:00 (30min) › Foundational AI for Solving PDEs and Systems on the Sphere - Christopher Pain, Applied Modelling and Computation Group, Imperial College London - Boyang Chen, Applied Modelling and Computation Group, Imperial College London (online) 12:00-12:30 (30min) Lunch 12:30 - 14:00 (1h30) Lunch Restaurants Related Topics 14:00 - 15:30 (1h30) Related Topics Auditório Jacy Monteiro › U-Net type convolutional neural network for data assimilation - Gerônimo Lemos, Instituto Nacional de Pesquisas Espaciais 14:00-14:30 (30min) › Poseidon: A Source-to-Source Compiler for Optimizing Ocean Simulation Models on Modern HPC Architectures - Martin Schreiber, Université Grenoble Alpes 14:30-15:00 (30min) Coffee break 15:30 - 16:00 (30min) Coffee break Auditório Jacy Monteiro Future Perspectives of Machine Learning use in Weather, Ocean and Climate Models. 16:00 - 16:45 (45min) Future Perspectives of Machine Learning use in Weather, Ocean and Climate Models. Auditório Jacy Monteiro Discussion Dinner 18:30 - 22:00 (3h30) Dinner	Physics Dynamics Coupling 9:00 - 10:30 (1h30) Physics Dynamics Coupling Auditório Jacy Monteiro › Efficient stochastic closure modelling by assimilating statistics - Sagy Ephrati, Chalmers University of Technology 09:00-09:30 (30min) › Turbulence model of the atmospheric boundary layer by G. I. Taylor's statistical theory applied to the global model BAM-INPE - Eduardo Rohde Eras, Instituto Nacional de Pesquisas Espaciais 09:30-10:00 (30min) › Recent Progress on the Met Office's LFRic Atmosphere Model - Thomas Bendall, Met Office (online) 10:00-10:30 (30min) Coffee break 10:30 - 11:00 (30min) Coffee break Auditório Jacy Monteiro Collaboration Workspace 11:00 - 12:00 (1h) Collaboration Workspace Final discussions on collaborations constructed during the event.

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