10.4.1 ISBA: snow update

The main entry point for snow assimilation in ISBA schemes are under ASSIM_ISBA_n, which calls ASSIM_ISBA_UPDATE_SNOW. Update of SURFEX snow is activated by setting LAESNM. However only D95 is supported at the moment. The snow fields updated to are entering the routines as input, and will normally come from the CANARI analysis. It can be notified as OI does a small alteration of the snow water equvivalent, the routine ASSIM_ISBA_UPDATE_SNOW is called twice to get the total increment after updating the snow.

• LAESNM : if T, update of the snow properties are performed.