Update Icepack Consortium main #390fb5518326217c2501dbf5, Sept 30, 2023

[apcraig]

See CICE-Consortium#462

Define new parameter, tscale_pnd_drain, that sets the timescale (in days) for macroscopic drainage when using mushy thermodynamics. This parameterization is described in Turner and Hunke 2015 (eqn 47). It contributes to flushing along with gravity drainage, and therefore is not the timescale for flushing overall. tscale_pnd_drain = 1 / lambda_pond in icepack_therm_mushy.F90.

Note: tscale_pnd_drain is not (yet) a namelist parameter, but it is now available in parameters for drivers to set their own values. This is needed for E3SM.

Change the default value of dpscale (scaling factor for meltpond flushing with BL99 thermo) to 1.e-3 in the code. This is the value used in icepack_in and all of our tests.

Clarify definition of dpscale in the code and documentation - dpscale alters the timescale for drainage but is only a unitless scaling factor.

Fix enthalpy units in code comments.

[apcraig]

A full CICE test suite for the Consortium versions with these changes on cheyenne with intel passes all tests bit-for-bit.

[eclare108213]

These changes were tested in Consortium suites. Will merge this now and then test it in Andrew's branch.

[eclare108213]

BFB in 3-month D cases:

    D3.nset05.emc.physics_cleanup2.update_icepack_8.eclare108213.anvil k001 - 
    D3.nset05.emc.physics_cleanup2.icepack-integration.eclare108213.anvil k001:

    iceAreaCell:  	BFB
    iceVolumeCell:  	BFB
    icePressure:  	BFB
    uVelocityGeo:  	BFB
    vVelocityGeo:  	BFB

    totalIceExtent:  	BFB
    totalIceVolume:  	BFB
    totalSnowVolume:  	BFB
    totalKineticEnergy:  	BFB
    averageAlbedo:  	BFB