Add option for explicit volcanic SO2 emissions

[gold2718]

What is the feature/what would you like to discuss?

Add an option to support explicit volcanic SO2 emissions for the NorESM2.1 release.

Is there anyone in particular you want to be part of this conversation?

No response

Will this change (regression test) answers?

No

Will you be implementing this enhancement yourself?

No

[oyvindseland]

I think this was included in the chemistry pull request? Or is it now the default only and still not an option? @DirkOlivie

[DirkOlivie]

Hi Øyvind, this was referring to the standard aerosol scheme, not to the full-chemistry (in the full chemistry this is the only option). The aim of this issue is to make for the aerosol-only scheme a suplimentary compset where one runs with volcanic SO2 emissions (it would not become the default). This has to be tested a bit (because one needs also OCS and its decay, and see whether the H2SO4 evolution in the stratosphere is ok when one uses OH climatologies), but it could go in a second phase of the NorESM2.3 release. So I suggest to leave it open for now. Best regards, Dirk