[MITgcm-devel] [EXTERNAL] ggl90 adjoint?

[Martin Losch]

Thanks Patrick and Ou,
that’s very helpful (so that I don’t have to debug my configuration hopelessly). Maybe I can find the time to stabilise this.

How about KPP. Does that work inADmode? If so, how did you make it work (probably @Patrick)? Maybe that can be used and transfered to ggl90.

Martin

PS. I was under the impression that ggl90 is preferred over kpp because it is more stable in ADmode, but obviously that was a misunderstanding ...

> On 29. Jun 2023, at 18:13, Wang, Ou (US 329B) <ou.wang at jpl.nasa.gov> wrote:
> 
> Hi Martin,
>  
> I had also tried to do an adjoint run without turning off GGL90 in the adjoint mode a while ago, but was not successful. Similar to what you are experiencing, that run quickly crashed in the adjoint mode. I didn’t attempt to debug it at the time.
>  
> Best,
> Ou
>  
> From: MITgcm-devel <mitgcm-devel-bounces at mitgcm.org> on behalf of Martin Losch <Martin.Losch at awi.de>
> Date: Thursday, June 29, 2023 at 8:27 AM
> To: MITgcm-devel <MITgcm-devel at mitgcm.org>
> Subject: [EXTERNAL] [MITgcm-devel] ggl90 adjoint?
> 
> Hi there,
> 
> this is a question for the ECCO related crowd. Is there a successful run with pkg/ggl90 NOT turned off in ADmode? i.e. that can get along without
>  useGGL90inAdMode = .FALSE.,
> in data.autodiff?
> 
> It keeps blowing up on me very quickly. Any insights are hightly appreciated? Did anyone try to debug this?
> 
> Martin
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