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Multiwavelet Discontinuous Galerkin Accelerated EPL Method
for the Shallow Water Equations on the Cubed Sphere
Katherine J. Evans, John Drake, and James White III
Oak Ridge National Laboratory, Oak Ridge, Tennessee
Corresponding author address: Rick Archibald, Oak Ridge National Laboratory, Bethel Valley Rd., Oak
Ridge, TN 37831.
Climate simulation will not grow to the ultrascale without new algorithms to overcome the
scalability barriers blocking existing implementations. Until recently, climate simulations
concentrated on the question of whether the climate is changing. The emphasis is now
shifting to impact assessments, mitigation and adaptation strategies, and regional details.
Such studies will require significant increases in spatial resolution and model complexity
while maintaining adequate throughput. The barrier to progress is the resulting decrease
in time step without increasing single-thread performance. In this paper we demonstrate a
new approach to overcome this time barrier for the standard tests defined within the climate