ice_thermo_cpl check very cold ice_temp

[chrisdane]

fesom2/src/ice_thermo_oce.F90

Lines 130 to 131 in 0a42953

	#if defined (__oifs) || defined (__ifsinterface)
	if (ice_temp(n) < 173.15_WP .and. a_ice(n) >= 0.1e-8_WP) ice_temp(n)=271.35_WP

Why 173.15K @JanStreffing? You meant 273.15? It's still in main. @a270091

Originally posted by @chrisdane in 5a19d91

[JanStreffing]

Not a good show. On the todo list. Hope we never practically used this.