[MITgcm-support] ptracers and shelfice package integration

[Martin Losch]

Hi Yilang,

the ptracers package implements advection and diffusion of passive tracers according to model physics. No forcing is implemented in the files in pkg/ptracers. in pkg/ptracers/ptracers_forcing_surf.F there’s an example of how to add surface forcing (salinity forcing), but it’s commented out.

That means that any forcing (i.e. melt processes in shelfice affecting a passive tracer) needs to be implemented by you, the user.

I ran shelfice with ptracers for my 2008 paper, but I only used initial conditions. If you want to, e.g. trace the melt water from ice shelf cavities, you need to add this explicited to the rhs of the ptracer. I guess it’s enough to add something in ptracer_forcing_surf, because in ptracers_apply_forcing, this surface forcing is already applied in the right place if shelfice is used.

Martin

> On 10. Jul 2020, at 00:41, Yilang Xu <yxu at whoi.edu> wrote:
> 
> Hi everyone, 
>  
> I am wondering if anyone has integrated package ptracers with shelfice. In the current model, I see that the ice shelf melt water does not affect passive tracer concentration. 
>  
> Thanks,
> Yilang
>  
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