Implement NorESM2.1 release (open for document links)

[gold2718]

Feature list Google Doc
Implementation Plan Google Doc

Issues that are part of this release:

• Update compiler support for NorESM 2.1 release #464
• Create new compsets for NorESM2.3 #465
• Add new chemistry scheme with Bromoform CAM#99
• Add trop+strat chemistry scheme CAM#100
• Add option for explicit volcanic SO2 emissions CAM#101
• Add explicit aerosol nucleation as chemistry option CAM#102
• Add SpAero chemistry scheme CAM#103

[jmaerz]

Dear @gold2718 , @mvertens and @DirkOlivie , (cc @TomasTorsvik and @JorgSchwinger ) we are almost there with regards to the preparation of BLOM/HAMOCC for the NorESM2.1 release. We will try to perform last testings with the updated HAMOCC code soon. However, due to other events and further time constrains it may happen that a final version can be delayed by 1 or 2 days (so expected 'shipment' is latest 21st of November). I/We hope this finds your understanding and try to push forward to get the braches/master completely ready within the next days.

[mvertens]

@jmaerz - thanks so much for the update and for the efforts of you and @TomasTorsvik and @JorgSchwinger to get a release tag to us. Please don't stress about the final date. If you can get a final version to us by the 21st that would be great. If its later - we'll adjust to that as well.

[jmaerz]

Dear @gold2718 , @mvertens , @DirkOlivie , (cc @TomasTorsvik , @JorgSchwinger and @matsbn ), with the latest commit to the master of BLOM (cca8d11), iHAMOCC experienced bug-fixes that break CMIP6 compatibility for bit-for-bit reproducibility. With this merge, BLOM is, from the iHAMOCC perspective, ready for use in NorESM2.1. Tmw, during the BLOM core meeting, we will probably discuss tagging the release version and general tagging of BLOM.

[mvertens]

@jmaerz - thanks so much for your work on this!

[gold2718]

@jmaerz, regarding the answer changes, the 2.1 release of CAM also has some answer changing bug fixes.

[jmaerz]

Dear @gold2718 , many thanks for the information.

[gold2718]

The first alpha tag, release-noresm2.1.0a1, has been made. The following tests have been run on Betzy:

ERS_Ld5.f09_tn14.N1850frc2.betzy_intel.allactive-defaultio
ERS_Ld5.f09_tn14.NHISTfrc2.betzy_intel.allactive-defaultio
ERS_Ld5.f19_tn14.N1850.betzy_intel.allactive-defaultio
ERS_Ld5.f19_tn14.N1850esm.betzy_intel.allactive-defaultio
ERS_Ld5.f19_tn14.NHIST.betzy_intel.allactive-defaultio
PFS.f09_tn14.N1850frc2.betzy_intel.allactive-defaultio
PFS.f09_tn14.NHISTfrc2.betzy_intel.allactive-defaultio
PFS.f19_tn14.N1850.betzy_intel
PFS.f19_tn14.N1850esm.betzy_intel
PFS.f19_tn14.NHIST.betzy_intel
SMS_D_Ld1.f09_tn14.N1850frc2.betzy_intel.allactive-defaultio
SMS_D_Ld1.f09_tn14.NHISTfrc2.betzy_intel.allactive-defaultio
SMS_D_Ld1.f19_tn14.N1850.betzy_intel.allactive-defaultio
SMS_D_Ld1.f19_tn14.N1850esm.betzy_intel.allactive-defaultio
SMS_D_Ld1.f19_tn14.NHIST.betzy_intel.allactive-defaultio

As a quick reminder:

ERS: Exact restart test
PFS: Performance test
SMS: 'Smoke' test (model runs and baselines are compared)

While the tests passed, baselines changed due to bug fixes.

The allactive-defaultio testmods are namelist changes that can be found in cime_config/testmods_dirs/allactive/defaultio.

[gold2718]

Finished by #498