Update water_global group3 note

Author: jochenklar

protocol/02.experiments.md

@@ -99,7 +99,7 @@ Tables 2.2-2.4 describe the different specifiers for the different experiments a
 
     #### Note regarding Group III simulations for the Global Water sector
 
-    For the ISIMIP3b Group III simulations, modelling teams in the global water sector are requested to first use the land use and irrigation direct human forcings, as well as non-irrigation water use for the models that need it, for the adaptation and no adaptation runs. These are the `default` Group III simulations for the sector.
+    For the ISIMIP3b Group III simulations, modelling teams in the global water sector are requested to first use the land use and irrigation direct human forcings, as well as non-irrigation water use for the models that need it. These are the `default` Group III simulations for the sector. These include adaptation and no adaptation runs; though note that non-irrigation water use forcing is the same for both.
 
     Then after that, as the `extrasoc` sensitivity experiment, modelling teams can choose by themselves which direct human forcings are included on top of land-use and irrigation (e.g. hydropower dams and inter-basin water transfer could be added by one model, while another model might add only desalination).