Chemistry at lower resolution

• Jung et al (2012), Tao and Chern (2017) have shown that greater resolution benefits both dynamics and convection, such as
  • storm tracks, and
  • mesoscale convective systems
• Till also found that the N48 model was poor for mid-latitude storm tracks dynamics.
• However, there's less evidence that other science benefits so strongly from greater resolution.
• Can other science which is prohibitively expensive be run at a lower resolution?
• In UKESM1, the chemistry slows the model by a factor of about 3 (200% slower)
• In UKESM1-hybrid, we run the chemistry at a lower resolution