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Repository for MPAS models and shared framework releases.
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Updated the calculation of the 2-meter temperature, potential temperature, and specfic humidity over seaice points #1147

Closed ldfowler58 closed 5 months ago

ldfowler58 commented 5 months ago

In MPAS-v8.0.1, the 2-meter temperature (t2m), potential temperature (th2m), and specific humidity (q2) are computed in subroutine sfcdiags which is called immediately after the call to seaice_noah in subroutine driver_lsm (see mpas_atmphys_driver_lsm.F). This implies that the input variables in subroutine sfcdiags have not yet been weighted by the seaice fraction which in turn impacts the calculation of the 2-meter diagnostics.

In order to have t2m, th2m, and q2 to depend on the seaice fraction, we moved the correction of local variables as functions of the seaice fraction and call to subroutine sfcdiags at the top of subroutine lsm_to_MPAS.

mgduda commented 5 months ago

Is this a fix that should be included in v8.0.2?

ldfowler58 commented 5 months ago

Hi Michael: Thanks for looking at this. It is not a bug fix (it is not a coding bug) since MPAS has been running like that for years; but it is a fix in the sense that it makes more sense to have those diagnostics computed after the variables that are used to compute them include the impact of the seaice fraction. Note that I had to rebase that branch using the previous PR (lsm_shared). I had to do this in preparation to add another PR before Noah-MP.

Should have some time later this afternoon about the bug in the Thompson cloud microphysics.

Thanks, Laura

On Wed, Mar 13, 2024 at 10:53 AM Michael Duda @.***> wrote:

Is this a fix that should be included in v8.0.2?

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