# Forcing nesting suite with ERA5

**URL:** https://cms-helpdesk.ncas.ac.uk/t/forcing-nesting-suite-with-era5/610
**Category:** Unified Model
**Tags:** ARCHER2, Nesting-Suite
**Created:** [9 June 2022 09:31 UTC](https://cms-helpdesk.ncas.ac.uk/t/forcing-nesting-suite-with-era5/610 "2022-06-09T09:31:11Z")
**Posts on this page:** 1
**Showing post:** 17

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### Author: ![shakka](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/shakka/32/111_2.png) [@shakka](https://cms-helpdesk.ncas.ac.uk/u/shakka)
#### Post date: [21 June 2022 10:40 UTC](https://cms-helpdesk.ncas.ac.uk/t/forcing-nesting-suite-with-era5/610/17 "2022-06-21T10:40:13Z")

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Hi Grenville,

I’ve managed to point the suite to those ancils. However I got errors about the mismatch between the model and ancil grid for the ozone, soil moisture and aerosol ancils similar to [this ticket](https://cms-helpdesk.ncas.ac.uk/t/vn12-0-suite-using-cariolle-ozone-scheme-crashing-in-reconfiguration/301). I set l\_ignore\_ancil\_grid\_check=.true. as advised, which converts the errors to warnings:

> ??? WARNING ???  
> ? Warning code: -1001  
> ? Warning from routine: ANCIL\_CHECK\_MOD::REPORT\_ANCIL\_ERRORS  
> ? Warning message:  
> ?  
> ? WARNINGS: 8 ancil files have failed ancil checking. These files did not cause an abort  
> ? due to the setting of l\_ignore\_ancil\_grid\_check=.true. in the items namelist:  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.ozone  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.smow  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.slt  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.sslt  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.ocff  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.sulp  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.biom  
> ? – /work/n02/n02/shakka/AP\_ancils\_for\_era5/qrclim.biog  
> ? Warning from processor: 0  
> ? Warning number: 2

The recon completes, but as you suggested in that ticket, it produces very strange output for the ancil fields in which the grid is ignored - e.g. compare the ec\_cb000 ozone field:

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/cms_support/original/1X/1cd7e1f5df315ff96306c70a845a665214ed5779.png)

… to the input climatology ancil:

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/cms_support/original/1X/ba95217f0b69ec53fe8991f5564bcca43b5694a3.png)

It may also be worth noting that the recon regrids the input data (on 70 levels) to 71 levels.

Relatedly, the forecast step also fails with:

> ? Error from routine: INBOUNDA  
> ? Error message: CHK\_LOOK\_BOUNDA : Wrong number of LBC fields

How many fields is the forecast expecting in the LBCs? And do I need to tell it somewhere to expect more/less? There are 10 presently.

Many thanks,  
Ella

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