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

[Dimitris Menemenlis]

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