Status of CMIP7 input datasets for a 2022 UKESM-AMIP simulation

General
1

Hi,

I am currently setting up a 2022 UKESM-AMIP simulation using the suite u-ed658, and I would like to check whether the newer input datasets available in the shared areas are generally ready for use in production simulations.

The main shared CMIP7 area I have been using is:

/work/y07/shared/umshared/cmip7/ancils/n96e

For my current 2022 setup, the relevant input categories include:

  1. CMIP7 AerosolChemistryEmissions
  2. CMIP7 historical GHG input
  3. CMIP7 VolcanicSad
  4. Reynolds SST/SIC
  5. vegetation/land-cover ancillary

I would like to ask whether, in general, the CMIP7 datasets currently available in the shared area can be considered validated/ready for UKESM simulations, or whether there are any specific input categories that are still preliminary or should not yet be used for production runs.

I have one particular question about land cover / vegetation fraction. I previously tried using the newer generic CMIP7 vegetation-fraction ancillary, but the UM rejected it with an ancillary-header compatibility error:

PP HEADERS ON ANCILLARY FILE DO NOT MATCH

Could you advise whether there is now a recommended CMIP7 land-cover/vegetation-fraction dataset suitable for an N96e UKESM-AMIP simulation, or whether retaining this existing UKESM ancillary is still the appropriate choice?

Many thanks,

Chang

2

Hi,

The ancillaries placed in shared/ central areas have been copied over after proper review.
These will be suitable for coupled / historical simulations, but for AMIP runs you would need ancillaries for fields that are derived from coupled simulations - DMS, Chlorophyll, vegetation (land cover, LAI, veg frac). These ‘UKESM1.3 model_derived’ ancils are still under review. (I do not believe there were any official UKESM1.1-historical/ future simulations with CMIP7 ancils).