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  1. Hybrid EnKF and Particle Filter: Langrangian DA and Parameter Estimation

    02 Jun 2016

    This is a talk delivered at the Imperial College meeting on Stochastic Modeling in GFD, Data Assimilation and Non-equilibrium Phenomena on 11-4-2015.  This talk presents joint research by Chris Jones at UNC-CH and Naratip Santitissandeekorn on hybrid data assimilation methods.

  2. A Tutorial on Kalman Filters

    01 Jun 2016

    This is an introduction to the Kalman filter, explaining some underlying assumptions, use and extensions of the method.This talk was given on 10-7-2015.

  3. Deriving the SWM Lecture 3: Barotropic Vorticity Equations

    04 May 2016 | Presentations

    This lecture develops the barotropic vorticity equations for the shallow water model.  This is background lecture 2.1C in the Mathematics of Climate Modelling course.

  4. Deriving the SWM Lecture 2: Stream Functions for Velocity Fields

    04 May 2016 | Presentations

    This lecture develops the formulation of the stream function for the velocity field of the shallow water equation.  his is the second in a series of short lectures on deriving the shallow water model, given by Chris Jones in 2013. 

  5. Deriving the SWM Lecture 1: Conservation of Potential Vorticity

    04 May 2016 | Presentations

    This lecture develops the conservation equation for potential vorticity in the shallow water model.

  6. Data assimilation for extreme ionospheric events: observing system experiments of the September 26, 2011 geomagnetic storm

    14 Apr 2016 | Presentations

    As increasingly sophisticated ground- and space-based technological systems that depend on the near-Earth space environment are being built, vulnerabilities to variations in the ionosphere are also increasing. These vulnerabilities are especially prominent during extreme space-weather events,...

  7. Local and non-local mechanisms of Arctic warming

    25 Feb 2016 | Presentations

    Polar amplification (PA) is a prominent feature of currently observed and predicted future climate change suggested by both observations and models. We will discuss several PA mechanisms and feedbacks in the ocean and the atmosphere suggested by different researchers and connect it to the real...

  8. MAA-NCS Summer Seminar Conceptual Climate Models

    22 Feb 2016 | Educational Materials

    MAA North Central Section Summer Seminar Conceptual Climate Models, July 22-24, 2013, Augsburg College in Minneapolis, MNSeminar home page: http://homepages.gac.edu/~hvidsten/MAASeminar/index.html 

  9. Jafarov Seminar

    30 Nov 2015 | Presentations

    Dr. Elchin Jafarov is a research associate at the National Snow and Ice Data Center, at the Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder. He has a PhD in Geophysics and a masters degree in Mathematics both from the University of Alaska Fairbanks....

  10. Global Warming Could Be Nonlinear

    23 Nov 2015 | Presentations

    It is widely acknowledged that many components of the Earth's climate system exhibit nonlinear behavior when forced, with examples ranging from ice sheets to ocean circulations to savanna. These changes, as profound as they are, are not expected to greatly impact global climate, as...

  11. Where's the Math in Climate Science?

    09 Nov 2015 | Presentations

    Abstract: Climate science is dominated by the use of large-scale models, of which there are only 30 or so around the world. It might then seem that the need for mathematics is limited to areas that directly support the operation of such models. I will explain, by digging into the way the models...

  12. Hybrid EnKF and Particle Filter: Lagrangian DA and Parameter Estimation

    06 Nov 2015 | Presentations

    Dealing with high dimensional systems is one of the central problems of data assimilation.  A strategy is proposed here for systems that enjoys a skew-product structure.   Christopher Jones, University of North Carolina at Chapel Hill, presents joint work with Naratip...

  13. Mathematics and Climate Research Network - An Example of a Successful Community-Building Eff ort

    19 Oct 2015 | Presentations | Contributor(s): Colin James Grudzien

    Slides Hans Kaper prepared for a talk on October 1, 2015, titled "The Mathematics and Climate Research Network (MCRN) - An Example of a Successful Community-Building Effort."  It was part of the MPE 2013+ Workshop on Education for the Planet Earth of Tomorrow, September...

  14. OptIC project: An intercomparison of optimization techniques for parameter estimation in terrestrial biogeochemical models

    20 Sep 2015 | Educational Materials

    A comparison of different optimization techniques for parameter estimation for a very simple ecosystem model (2 ODEs).

  15. The REFLEX project: Comparing different algorithms and implementations for the inversion of a terrestrial ecosystem model against eddy covariance data

    20 Sep 2015 | Educational Materials

    A comparison of parameter estimation techniques for a simplified ecosystem model.  A follow-on to the OpTIC study with a more complex model (DALEC).

  16. Orbital Forcing and Ice Age

    02 Jun 2015 | Educational Materials

    Annotated Bibliography by Daniel Koll

  17. Midwest Mathematics and Climate Conference - Day 2 Morning Session

    12 May 2015 | Presentations

    Juan Restrepo, Oregon State UniversityData AssimilationAccounting for uncertainties has led us to alter our expectations of what is predictable and how such predictions compare to nature. A significant effort, in recent years, has been placed on creating new uncertainty quantification techniques,...

  18. Midwest Mathematics and Climate Conference

    12 May 2015 | Workshops

    The conference is sponsored by the National Science Foundation, Institute of Mathematics and Its Applications, the Office of Research,College of Liberal Arts and Sciences, and the Department of Mathematics, Department of Geography/Atmospheric Science Program, and The...

  19. Midwest Mathematics and Climate Conference

    12 May 2015 | Workshops

    The conference is sponsored by the National Science Foundation, Institute of Mathematics and Its Applications, the Office of Research,College of Liberal Arts and Sciences, and the Department of Mathematics, Department of Geography/Atmospheric Science Program, and The...

  20. Midwest Mathematics and Climate Conference

    12 May 2015 | Workshops

    The conference is sponsored by the National Science Foundation, Institute of Mathematics and Its Applications, the Office of Research,College of Liberal Arts and Sciences, and the Department of Mathematics, Department of Geography/Atmospheric Science Program, and The...