[MITgcm-support] Stratification creating current without forcing (Martin Losch)

[Michael Spall]

Hi Nadine,
This may result from diffusion and the no-flux into the bottom. This
forces the isopycnals to be perpendicular to the topography which,
for a sloping bottom gives rise to pressure gradients and a geostrophic
flow. I found something similar in the past.

Mike

Sent from my iPad

> On Nov 28, 2019, at 6:00 AM, Martin Losch <Martin.Losch at awi.de> wrote:
> 
> Hi Nadine,
> 
> this is weird, can you make your configuration available, so I can run it? I guess a coarse grained version would be enough? (code directory, and input directory with bathymetry, etc, and startification, please don’t post the files to this list, but rather a link).
> 
> Martin
> 
>> On 28. Nov 2019, at 10:42, Nadine Steiger <Nadine.Steiger at uib.no> wrote:
>> 
>> Hi,
>> 
>> salinity does not go below or above the initial values.
>> 
>> When creating the hydrogSaltFile, I precribe the salinity everywhere, as I figured that MITgcm masks the topography during initialization.
>> 
>> I tried to prescribe salinity through hydrogSaltFile and through sRefFile, but I get the same issue in both cases.
>> 
>> When I turn off saltStepping and saltAdvection, the ocean stays in rest.
>> 
>> When I use a flat bottom instead of a channel, the problem does not occur either.
>> 
>> Nadine
>> 
>> 
>> -- 
>> Nadine Steiger
>> PhD Candidate
>> University of Bergen | Geophysical Institute
>> Bjerknes Centre for Climate Research
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