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  1. A Survey of Grid Control and Optimization

    07 May 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    This is an introductory survey of how control problems arise on different time scales in electric grid transmission problems.  The set up and general form of such problems are considered, along with operational considerations.

  2. An Introduction to Lagrangian Data Assimilation - Part I

    23 Mar 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    Laura Slivinski at Woods Hole Oceanographic Institute gives an introduction to Lagrangian Data Assimlation on 10-30-2014.

  3. An Introduction to Lagrangian Data Assimilation - Part II

    23 Mar 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    Lauara Slivinski at Woods Hole Oceanographic Institution gives an introduction to Lagrangian Data Assimilation on 11-13-2014.

  4. An Introduction to Variational Data Assimilation

    23 Mar 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    Naratip Santitissadeekorn gives an introductory survey of variational techniques in data assimilation including 3D-VAR and 4D-VAR.  This talk was given on 10-2-14.

  5. Andy Reagan: Masters Thesis

    23 Mar 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    Andy Reagan at UVM gives a talk about his masters work on uncertainty quantification and data assimilation to improve the numerical prediction of fluids in the thermosyphon. This talk will involve several data assimilation methods, including variational techniques, but will focus on LETKF....

  6. Complex Energy Systems

    07 May 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    This is the opening guest lecture for the Electric Grid Focus Group.  Dr. Michael Chertkov of Los Alamos National Lab describes the statistical and mathematical problems arising in complex energy systems, including the electric grid and gas networks.  Systems with high penetration of...

  7. Computational Techniques for Lyapunov Exponents and Vectors

    23 Mar 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    In this talk we present computational techniques for Lyapunov exponents and vectors based upon continuous matrix factorizations (QR and SVD). We outline the techniques, their well-posedness, error analysis/perturbation theory, and describe codes we have developed. We then discuss application of...

  8. Correlated Observation Errors in Data Assimilation

    30 Apr 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    Remote sensing observations often have correlated errors, but the correlations are typically ignored in data assimilation for numerical weather prediction. The assumption of zero correlations is often used with data thinning methods, resulting in a loss of information, and reduction in analysis...

  9. Emulators in climate science. Uncertainty, sensitivity, calibration and more

    30 Apr 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    An emulator or a surrogate is a statistical approximation of a complex numerical model. Emulators are fast to run and include a measure of their own uncertainty. This makes them suitable for a number of applications in climate science. Emulators were originally devised for uncertainty...

  10. Extending the square root method to account for model noise in the ensemble Kalman filter

    25 Feb 2015 | Presentations | Contributor(s): Mary Lou Zeeman

    Presented by Patrick Raanes on 2-18-2015 Abstract:A novel approach to account for model noise in the forecast step of the Ensemble Kalman filter (EnKF) is proposed.  The core method is based on the approach of the analysis step of ensemble square root filters (ETKF), and...

  11. Introduction to the Mathematics of Climate

    07 May 2015 | Series

    This course will investigate the following questions from a mathematical perspective. What determines the Earth's surface temperature? Why does the carbon dioxide in the atmosphere affect the climate? How do changes in the Earth's orbital parameters change the climate? Why has the Earth...

  12. Introduction to the Mathematics of Climate at UMN - Lecture 1

    07 May 2015 | Presentations

    This is lecture 1 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.       

  13. Introduction to the Mathematics of Climate at UMN - Lecture 10

    12 May 2015 | Presentations

    This is lecture 10 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.

  14. Introduction to the Mathematics of Climate at UMN - Lecture 11

    12 May 2015 | Presentations

    This is lecture 11 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.      

  15. Introduction to the Mathematics of Climate at UMN - Lecture 12

    12 May 2015 | Presentations

    This is lecture 12 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.

  16. Introduction to the Mathematics of Climate at UMN - Lecture 13

    12 May 2015 | Presentations

    This is lecture 13 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.

  17. Introduction to the Mathematics of Climate at UMN - Lecture 14

    12 May 2015 | Presentations

    This is lecture 14 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.  

  18. Introduction to the Mathematics of Climate at UMN - Lecture 15

    12 May 2015 | Presentations

    This is lecture 15 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.  

  19. Introduction to the Mathematics of Climate at UMN - Lecture 16

    12 May 2015 | Presentations

    This is lecture 16 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.

  20. Introduction to the Mathematics of Climate at UMN - Lecture 17

    12 May 2015 | Presentations

    This is lecture 17 in the series "Introduction to the Mathematics of Climate" offered at the University of Minnesota in 2014 with the support of MCRN and The Institute for Mathematics and its Applications.