UKCA

  • Chemistry, both aerosol (in GA) and full chemistry (not in GA)
  • A research model which has been in UM for several years
  • This is peer reviewed

MEDUSA

  • Ocean biogeochemistry, completes carbon cycle
  • The only component of UKESM to be put up for tender
  • Does not directly interact with science in NEMO (it does provide CO2 flux and DMS for ATMOS)
  • A branch of NEMO (now in GO6 package branch)
  • Not allowed on NEMO trunk, because
    • PISCES already there, or
    • No plans for NEMO4.0
  • Until now, only a research model
  • Not peer reviewed