Ajout a la documentation concernant la facon de specifier la glace.

nml/airsea.nml

@@ -21,9 +21,10 @@
 !                       or dew point temperature in C (depending on wet_mode)
 !                     - cloud cover in 1/10
 !
-! ice_method       -> method for taking sea ice account in light attenuation
+! ice_method       -> method for taking sea ice into account
+!                     in calculations of light attenuation
 !                  0: No sea ice (ice=0)
-!                  1: Constant ice concentration
+!                  1: Constant ice concentration (in %, default=50%)
 !                  2: ice are read from ice_file
 !
 ! ice_file         -> file with sea ice data (for calc_fluxes=.true.)
@@ -31,8 +32,8 @@
 !                      - ice concentration in %
 !
 ! iceatt           -> Attenuation coefficient through ice
-!                      (0.96 means that 4% of light will pass
-                        through a complete ice cover)
+!                     (0.96 means that 4% of light will pass
+!                      through a complete ice cover)
 !
 ! wet_mode         -> decides what is given in 7. column in meteo_file
 !                  1: relative humidity
@@ -45,7 +46,7 @@
 !                  0: heat flux not prescribed
 !                  1: constant "const_swr" and "const_qh" given (see below)
 !                  2: swr and qh are read from heatflux_file
-
+!
 ! const_swr        -> constant value of incoming short wave radiation in W/m^2
 !                     (always positive)
 !