Name: Oksana Guba
Pronouns:
Biography:
I am an applied mathematician with a PhD from UNM and more than 10 years of experience at Sandia National Laboratories, mostly focusing on atmosphere modeling in DOE’s climate model, E3SM, with respect to its formulation, algorithms, and performance. Previously I worked on diffusion mechanisms for the spectral element method (a version of finite elements methods (FEM)), meshing (as in meshing a 2d sphere with conforming quadrilaterals), limiters (mechanisms to preserve properties of physical quantities in FEM, but not only), and time stepping methods for atmospheric applications (implicit-explicit Runge-Kutta methods and their analysis). Presently I am involved in tasks related to high-performance computing, thermodynamics, and new geometric approximations for atmospheric models.
Institution/Lab: Sandia National Laboratories
Website:
SRP Collaboration Topic/Title: Improving vertical discretizations in atmospheric modeling
Field or research area: Numerical methods, atmospheric modeling
Please select all the topical areas that apply to your project:
Computational Science Applications (i.e., bioscience, cosmology, chemistry, environmental science, nanotechnology, climate, etc.); High-Performance Computing
Brief Abstract:
Due to the specifics of the flow in atmospheric global circulation models, horizontal and vertical dimensions are discretised very differently. The atmospheric dynamical core in the climate model that we use is formulated for hybrid pressure-based vertical levels. There are a few research questions that are related to the vertical discretizations in our model. For example, while having more vertical levels is better for model’s fidelity, their number is restricted by related computational cost. Therefore there is a question of how and where to place a limited number of vertical levels while increasing the model’s fidelity and usability for applications. The project can be focused on a few relevant aspects, including developing numerical methods, evaluation of the model for climate applications, or uncertainty quantification.
Desired relevant skills, background, or interests:
The project would be tailored to the participant’s interests and background, assuming it is relatively connected to the atmospheric modeling.
Other comments:
Do any special requirements apply? Minimum GPA (specify what GPA in comments below); In-Person Only; Permanent Resident OK
Other, specify:
Keywords:
atmospheric modeling, numerical modeling and analysis, global climate models
Lightning Talk Title: Atmospheric modeling in E3SM