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Universidad EAFIT
Carrera 49 # 7 sur -50 Medellín Antioquia Colombia
Carrera 12 # 96-23, oficina 304 Bogotá Cundinamarca Colombia
(57)(4) 2619500 contacto@eafit.edu.co

Workshop in data assimilation Workshop in data assimilation Workshop in data assimilation

1st International Workshop on Data Assimilation for Decision Making
Universidad del Norte y Universidad EAFIT

September 16 and 17 2019 Medellín, Colombia

September 18, 19 and 20 2019 Barranquilla, Colombia



Más información:

Información de contacto del evento:

Departamento Ingeniería de Sistemas, ingsistemas@uninorte.edu.co

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Objective​


Data Assimilation is the process by which an imperfect numerical forecast is adjusted according to real-noisy observations. In general, two well-known family of methods are employed under operational DA scenarios: sequential and variational formulations. In sequential DA methods, observations are assimilated one at a time while variational methods, typically, seek for the initial condition which best fit a given assimilation window. The ensemble Kalman filter (EnKF) is a well-established and -recognized filter into the sequential DA context. The EnKF is usually exploited for parameter and state estimation in highly non-linear numerical models, its popularity obeys to his simple formulation and relatively ease implementation. In the EnKF, an ensemble of model realizations is employed to estimate moments of background error distributions and through observations, to obtain samples of posterior (analysis) distributions. Stochastic and deterministic formulations of such filter are widely found in the current literature. Regardless his nature, ensemble sizes are bounded by the hundreds while model resolutions are in the order of the millions. 

Consequently, sampling errors can impact the quality of posterior samples which can lead to poor estimates of error dynamics. Localization methods are commonly employed to counteract the effects of sampling noise, for instance, some of them are covariance matrix localization (B-localization), observation localization (R-localization), and local domain decomposition. Despite these methods have been tested under operational DA settings, their practical implementations are an active field into the DA community wherein, for instance, scientific efforts are typically centered in proposing matrix-free EnKF implementations. In the variational context, Four Dimensional Variational (4D-Var) methods are commonly utilized for the estimation of initial conditions in numerical models for a given set of temporally-spaced observations. These methods rely on adjoint models which are labor-intensive to develop and computationally expensive to run. Yet another family of methods are the hybrid ones which have proven to properly work under operational settings. In these methods, an ensemble of model realizations is employed to build surrogate models of the 4D-Var cost function onto ensemble sub-spaces wherein analysis innovations are estimated and via their projections onto model spaces, initial analysis ensembles (whose model trajectories best fit observations) can be estimated.

 

Main topics

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DA by itself is a very challenging task with strong foundations in mathematics and statistics but, once forecasts are obtained properly estimated their use can be exploited in many branches of science, for instance:

  1.  To analyze the economic impacts of wind farm placements in Latin American and Caribbean countries,
  2.  To estimate error distributions for wind speed forecasts, wind power distributions, and (potential) economic impact scenarios,
  3.  To propose complementary green sources of energy for the hydro-dominated electricity grids (as the winds are stronger during the dry season when hydroelectric generation is most limited),
  4.  To estimate pollutant concentrations for different spatial scales,
  5.  To provide proper (depending on solar and/or wind power generation) green-energy sources in remote regions of the planet, and
  6.  To prevent natural disasters.

The workshop aims to address well-known issues in the DA community:


  1.  Efficient and practical implementations of background error covariance matrix estimators.
  2.  Matrix-free ensemble Kalman filter implementations for parameter and state estimation in highly non-linear models.
  3.  Adjoint-free 4D-Var methods for (non) linear data assimilation methods.
  4.  Optimization methods for non-linear data assimilation.
  5.  Non-Gaussian Data Assimilation methods in high-dimensional probability spaces.
  6.  Sampling methods for non-Gaussian Data Assimilation.


Agenda Medellín  Monday and Tuesday

16 and 17, September 2019


Data Assimilation and Inverse problems Short course 

VENUE Universidad EAFIT - PhD in Mathematical Engineering


No registration free - register before August 31, 2019 

Departamento Ingeniería de Sistemas, ingsistemas@uninorte.edu.co


Monday


Morning

​Inverse Modeling Applications of Computational Science -Adrian Sandú

Morning

Morning

Morning

​Afternoon

​Inverse Modeling Applications of Computational Science -Adrian Sandú

​Inverse Modeling Applications of Computational Science -Adrian Sandú

​Inverse Modeling Applications of Computational Science -Adrian Sandú

​Ensemble-based data assimilation -Geir Evensen


Tuesday


​Morning

Adjoint free data assimilation - Arnold Heemink

​Morning

​Morning

​Morning

​Afternoon

Adjoint free data assimilation - Arnold Heemink

Adjoint free data assimilation - Arnold Heemink

Adjoint free data assimilation - Arnold Heemink

​Particle filters for non-linear data assimilation - Jonathan Poterjoy




Agenda Barranquilla Wed -Thu- Fri

18, 19 and 20, September 2019


Data Assimilation for Decision making 

VENUE Universidad del Norte - Computer Science Department


  • DIGIRES Ensemble-based decision making for reservoir engineering  - Geir Evensen

  • Tuning covariance localization using machine learning - Adrian Sandú

  • On the incremental 4DVar data assimilation for China air pollution decision making - Arnold Heemink

  • Particle filters based localization for geophysical models - Jhon Edinson Hinestroza

  • On the hybrid data assimilation strategies for cyber physical systems - O. L Quintero 

  • An Ensemble Kalman Filter Implementation Based On Modified Cholesky Decomposition for Inverse Covariance Matrix Estimation - Elías Niño

  • Problem based localization for Ensemble based data assimilation in complex systems - Santiago López-Restrepo

  • Ensambled 4DVAR data assimilation for satellite and tropospheric data in CTM - Andrés Yarce Botero 


 




Work team




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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 



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Jonathan Poterjoy  

Assistant Professor in the Department of Atmospheric and Oceanic Science at the University of Maryland. , USA



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte


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Nicolás Pinel

Grupo de Investigación en Biodiversidad, Evolución y Creación (BEC) Department of Biological Sciences, Universidad EAFIT.


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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Prof. Dr. Ing. 
Arnold Heemink

Department of Applied Mathematics

Mathematical Physics Group

TUDelft, The Netherlands.



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Jonathan Poterjoy  

Assistant Professor in the Department of Atmospheric and Oceanic Science at the University of Maryland. , USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Prof. Dr. 
Geir Evensen

Nansen Environmental and Remote Sensing Center, NRSC 

Bergen, Norway



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



2.png

Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte



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Elias Niño 

Associate Professor and Chair of the Department Computer Science

Universidad del Norte


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Andrés Yarce, MSc.

PhD Student at Department of Applied Mathematics, TU Delft, The Netherlands.


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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O. Lucía Quintero 

Professor of Department of Mathematical Sciences, Universidad EAFIT. 


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Santiago López, MSc.

PhD Student at Department of Applied Mathematics, TU Delft, The Netherlands.



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Jonathan Poterjoy  

Assistant Professor in the Department of Atmospheric and Oceanic Science at the University of Maryland. , USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


4.png

Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


4.png

Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


4.png

Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Jeffrey Anderson 

Section Head Computational and Information systems laboratory, National Center for Atmospheric Research NCAR

UCAR, USA


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Adrian Sandu

Professor Department of Computer Science

Virginia Tech, USA



Scientific Support Team


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Kristell Urueta

Computer Science Student , Universidad del Norte

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Valentina Movil Sandoval

Mechnical Engineering Student, Universidad EAFIT 






Sponsored by


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Workshop in data assimilation