[MITgcm-support] KPP and zref with fine resolution vertical grid

[Hazel, Julia]

I'm using AMPS / Polar WRF for my surface forcing- I chose it as the most reliable for the poles/since I'm simulating the Weddell Sea in Antarctica. I'm using SOSE for my boundary conditions including sea ice.  I do have some concerns as to how well SOSE is representing the sea ice, especially at the eastern boundary of my domain.

Julia



> On Oct 19, 2016, at 17:13, Dimitris Menemenlis <dmenemenlis at gmail.com> wrote:
> 
> Hi Julia, I have run MITgcm + KPP with 1-m surface level and did not get anomalously warm temperatures.
> Maybe it’s a problem with your surface forcing?  What do you use as surface boundary conditions?
> 
> Dimitris
> 
>> On Oct 19, 2016, at 5:00 PM, Hazel, Julia <jhazel at atmos.ucla.edu> wrote:
>> 
>> I have a question about using KPP and zref with a vertical grid that has a resolution of thickness <2m in the vertical.  In the MITgcm manual, the KPP routine KPP_CALC states that for such vertical grids, the calculation of the surface reference depth should be epsilon/2*zgrid(k).
>> 
>> 
>> I wanted to ask if this means that the KPP routine needs to be modified in the zref calculation. The KPP_calc routine is rather comprehensive and I’m wary about changing that code.
>> 
>> I’m getting anomalously high temperatures in my model runs at the surface and I’m wondering if the boundary layer depth based on the zref calculation in KPP could be causing this.
>> 
>> 
>> Thank you-
>> Julia Hazel
> 
> 
> 
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