Hello,
I have not found any standard name for sea ice types: first year ice versus
multi-year ice. This is quite important for shipping and for climate studies.
We have added the age of sea ice as part of our sea ice model variables
using a time tracer. This allows us to classify first-year from multi-year ice
and compare our model results to ice charts.
So our suggestion is to introduce two new variables for the age and the fraction
of first year ice. The fraction of multi-year ice can be deduced from the latter
as complement to the sea ice concentration. See below.
Hope that is acceptable,
Regards
Laurent Bertino
short fy_frac(time, y, x) ;
fy_frac:_FillValue = -32767s ;
fy_frac:missing_value = -32767s ;
fy_frac:add_offset = 0.5 ;
fy_frac:scale_factor = 1.52587890625e-05 ;
fy_frac:units = "%" ;
fy_frac:standard_name = "percentage_of_first_year_ice" ;
fy_frac:grid_mapping = "stereographic" ;
fy_frac:coordinates = "longitude latitude" ;
fy_frac:cell_methods = "area: mean" ;
short fy_age(time, y, x) ;
fy_age:_FillValue = -32767s ;
fy_age:missing_value = -32767s ;
fy_age:add_offset = 182.5 ;
fy_age:scale_factor = 0.0055694580078125 ;
fy_age:units = "day" ;
fy_age:standard_name = "age_of_first_year_ice" ;
fy_age:grid_mapping = "stereographic" ;
fy_age:coordinates = "longitude latitude" ;
fy_age:cell_methods = "area: mean" ;
_________________________________________
Laurent Bertino
Mohn-Sverdrup Center / NERSC
Thormoehlensgt. 47 Tel: +47 55 20 58 61
N-5006 Bergen Mob: +47 93 45 62 15
Norway Fax: +47 55 20 58 01
http://msc.nersc.no http://topaz.nersc.no
_________________________________________
"He uses statistics as a drunken man uses lamp-posts -- for support rather than illumination. " - Andrew Lang(1844-1912)
Received on Wed May 25 2011 - 07:54:15 BST
