NG-R2C - GC-Faster

Reducing the numerical precision from double precision to single precision offers a potential route to significantly reducing the computational cost of Earth System Model, and aware that

single precision implementations of Momentum model components can be around 30% quicker

than their double precision counterparts. At present, the United Kingdom Chemistry and Aerosols

(UKCA) sub-model remains one of the major Momentum components that only operates in double

precision, which makes it an attractive target for potential optimisation.

However, we also understand that any single precision implementation of a component must be

scientifically neutral to make it feasible. Research must therefore be performed to ensure that any implementation does not degrade scientific performance. An exploratory scoping exercise could be performed with the following deliverables in advance of a full implementation: