Merge branch 'darincomeau/ocn/change-ais-ice-removal' (PR #6794)

Change range of solid ice runoff removal from 60S to 57S

Extends the northern range of solid ice runoff from Antarctica from 60S
to 57S when the ocean's namelist option
config_remove_ais_ice_runoff = .true.. The new solid ice runoff mapping
with increased smoothing for the SOwISC12to30E3r3 mesh in PR #6759 has a
small amount of runoff north of 60S, which needs to be removed when
Antarctic solid ice runoff is intended to be removed.

[BFB] for all tested configuration

Author: jonbob

components/mpas-ocean/driver/ocn_comp_mct.F

@@ -2181,7 +2181,7 @@ subroutine ocn_import_mct(x2o_o, errorCode)!{{{
                call shr_sys_abort ('Error: incoming rofi_F is negative')
            end if
            if (config_remove_ais_ice_runoff) then
-              if (latCell(i) < -1.04719666667_RKIND) then ! 60S in radians
+              if (latCell(i) < -0.99483767345_RKIND) then ! 57S in radians
                  removedIceRunoffFlux(i) = iceRunoffFlux(i)
                  iceRunoffFlux(i) = 0.0_RKIND
                  removedIceRunoffFluxThisProc = removedIceRunoffFluxThisProc + removedIceRunoffFlux(i)
@@ -3714,7 +3714,7 @@ subroutine ocn_import_moab(Eclock, errorCode)!{{{
                call shr_sys_abort ('Error: incoming rofi_F is negative')
            end if
            if (config_remove_ais_ice_runoff) then
-              if (latCell(i) < -1.04719666667_RKIND) then ! 60S in radians
+              if (latCell(i) < -0.99483767345_RKIND) then ! 57S in radians
                  removedIceRunoffFlux(i) = iceRunoffFlux(i)
                  iceRunoffFlux(i) = 0.0_RKIND
                  removedIceRunoffFluxThisProc = removedIceRunoffFluxThisProc + removedIceRunoffFlux(i)