Opened 2 years ago

Closed 2 years ago

#2802 closed help (fixed)

nudging with cmip6 emissions on Archer

Reported by: zliu Owned by: um_support
Component: UM Model Keywords: nudging
Cc: Platform: ARCHER
UM Version: 10.7



I am using UM10.7, GA7.1 to do some nudged experiments with CMIP6 emissions. The model crash with error as follows:
NetCDF calendar 360_day does not match model calendar, and attribute calendar_flexible /= 1 or not set
I am wondering if there are Gregorian calendar cmip6 emission files on Archer.
The cmip6 emission I used now is under /work/y07/y07/umshared/CMIP6_ANCIL/data/ancils/n96e/timeseries_1850-2014/AerosolChemistryEmissions/v3


Change History (3)

comment:1 Changed 2 years ago by luke

Hi Zhen,

I've checked with Mohit Dalvi (the nudging Code Owner at the Met Office) and he said:

I think there are two CMIP6 files that will be incompatible with Gregorian calendar:

  • CH4_biomass_low. This was deliberately not created with calendar_flexible=1 as Alistair Sellar thought the global annual totals for this long-lived species will differ for 360 vs 365 days. However, as the data is not used by UKCA (specified CH4), I have created the calendar_flexible version anyway on Monsoon in: /projects/ukca-admin/inputs/ancil/n96e/cmip6/AeroChemEms/tseries_1850-2014/
  • 3-D (Natural) SO2 emissions: The Gregorian equivalent is : /projects/ukca-admin/inputs/ancil/gregorian/n96e/ukca_emiss/aerocom/v1/ This should be already on ARCHER as it is used in the Nudged Release job.

On ARCHER, I have copied the first of these files to


and the second of these files can be found at


While the name is different I have checked and it is the same file as on Monsoon2.

Give it a try with these and see what happens. The job.out file might also print the name of the file that has an issue, if you find this reoccurring.


comment:2 Changed 2 years ago by zliu

Hi Luke,

Thanks for your quick responses and copy the corresponding files on Archer.
But the HadGEM3 GA7.1 runs do not need CH4 emission and CO2 emission files. Maybe I am wrong. Actually, I am not sure where to put the path of these files under the model code.
Could you please point it out if I understand wrong. Thanks.


comment:3 Changed 2 years ago by willie

  • Keywords nudging added
  • Platform set to ARCHER
  • Resolution set to fixed
  • Status changed from new to closed
  • UM Version set to 10.7
Note: See TracTickets for help on using tickets.