### Climate Change Science Institute, ORNL

#### Biography

Katherine J. Evans is the Group Leader for the Computational Earth Sciences group and a member of the Earth Systems Modeling Group in the Climate Change Science Institute at ORNL. She develops high-resolution global Earth system models and investigates global and regional climate variability with them. Particularly, she focuses on developing and implementing scalable numerical algorithms to improve coupled model efficiency and accuracy for multi-scale configurations as part of the DOE BER SciDAC (Scientific Discovery through Advanced Computing) project, "Multiscale Methods for Accurate, Efficient, and Scale-Aware Models of the Earth System (W. Collins, LBL, PI)." As the ORNL site-PI and Validation and Verification task lead for SciDAC project, "Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES)," she leads a team to develop advanced evaluation metrics and software for the Community Ice Sheet Model within the Community Earth System Model (CESM).

Evans earned her PhD in atmospheric science with an emphasis in math from the Georgia Institute of Technology in 2000. She joined ORNL in 2007 after a stint as a post-doctoral researcher at Los Alamos National Laboratory in the Decision Applications and Theoretical Division. She is a member of the American Meteorological Society, American Geophysical Union, and the Society of Industrial and Applied Mathematicians.

#### Research

Climate Change Modeling

Atmospheric Sciences

#### Publications

**Evans, K. J.**, Lauritzen P. H., Mishra S. K., Neale R. B., Taylor M. A., & Tribbia J. J. (2013). AMIP Simulation with the CAM4 Spectral Element Dynamical Core. Journal of Climate. 26(3), 689 - 709.

Jia, J., Hill J. C., **Evans K. J.**, Fann G. I., & Taylor M. A. (2013). A spectral deferred correction method applied to the shallow water equations on a sphere. Monthly Weather Review. 130208070720007.

Mahajan, S., **Evans K. J.**, Truesdale J. E., Hack J. J., & Lamarque J. - F. (2012). Interannual Tropospheric Aerosol Variability in the Late Twentieth Century and Its Impact on Tropical Atlantic and West African Climate by Direct and Semidirect Effects. Journal of Climate. 25(23), 8031 - 8056.

Carpenter, I., Archibald R., **Evans K. J.**, Larkin J., Micikevicius P., Norman M., et al. (2012). Progress towards accelerating HOMME on hybrid multi-core systems. International Journal of High Performance Computing Applications.

Dennis, J. M., Edwards J., **Evans K. J.**, Guba O., Lauritzen P. H., Mirin A. A., et al. (2012). CAM-SE: A scalable spectral element dynamical core for the Community Atmosphere Model. International Journal of High Performance Computing Applications. 26(1), 74 - 89.

**Evans, K. J.**, Salinger A. G., Worley P. H., Price S. F., Lipscomb W. H., Nichols J. A., et al. (2012). A modern solver interface to manage solution algorithms in the Community Earth System Model. International Journal of High Performance Computing Applications. 26(1), 54 - 62.

Archibald, R. K., **Evans K. J.**, Drake J. B., & White J. B. (2011). Multiwavelet Discontinuous Galerkin Accelerated ELP Method for the Shallow Water Equations on the Cubed Sphere. Monthly Weather Review. 457-473.

Lemieux, J. - F., Price S. F., **Evans K. J.**, Knoll D., Salinger A. G., Holland D. M., et al. (2011). Implementation of the Jacobian-free Newton-Krylov method for solving the first-order ice sheet momentum balance. Journal of Computational Physics. 230, 6531-6545.

**Evans, K. J.**, Taylor M. A., & Drake J. B. (2010). Accuracy Analysis of a Spectral Element Atmospheric Model Using a Fully Implicit Solution Framework. Monthly Weather Review. 138, 3333-3341.

**Evans, K. J.**, Rouson D., Salinger A., Taylor M., Weijer W., & White III J. B. (2009). A Scalable and Adaptable Solution Framework within Components of the Community Climate System Model. (Hutchison, David, Kanade, Takeo, Kittler, Josef, Kleinberg, Jon M., Mattern, Friedemann, Mitchell, John C., Naor, Moni, Nierstrasz, Oscar, Pandu Rangan, C., Steffen, Bernhard, Sudan, Madhu, Terzopoulos, Demetri, Tygar, Doug, Vardi, Moshe Y., Weikum, Gerhard, Allen, Gabrielle, Nabrzyski, Jaroslaw, Seidel, Edward, Albada, Geert Dick, Dongarra, Jack, Sloot, Peter M. A., Ed.).Lecture Notes in Computer Science. 5545, 332 - 341.

Archibald, R. K., **Evans K. J.**, Drake J. B., & J. B. White I. I. I. (2009). Time Acceleration Methods for Advection on the Cubed Sphere. Lecture Notes in Computer Science. 5545, 253-262.

**Evans, K. J.**, & Knoll D. A. (2007). Temporal accuracy analysis of phase change convection simulations using the JFNK-SIMPLE algorithm. International Journal for Numerical Methods in Fluids. 55(7), 637 - 653.

**Evans, K. J.**, Knoll D., & Pernice M. (2007). Enhanced algorithm efficiency for phase change convection using a multigrid preconditioner with a SIMPLE smoother. Journal of Computational Physics. 223(1), 121 - 126.

**Evans, K. J.**, Knoll D., & Pernice M. (2006). Development of a 2-D algorithm to simulate convection and phase transition efficiently. Journal of Computational Physics. 219(1), 404 - 417.

**Evans, K. J.**, & Black R. X. (2003). Piecewise Tendency Diagnosis of Weather Regime Transitions. Journal of the Atmospheric Sciences. 60(16), 1941 - 1959.

Black, R. X., & **Evans K. J.** (1998). The Statistics and Horizontal Structure of Anomalous Weather Regimes in the Community Climate Model. Monthly Weather Review. 126(4), 841 - 859.