Binary files description:

Arctic Ice Concentration
------------------------
304 columns x 448 rows
2-byte integer
big endian byte order
scaled by 10.

0-1000 ice concentration (divide by 10 to get percent sea ice)
-10000 coast
-9999  land
-50    no-data hole


Antarctic Ice Concentration
------------------------
316 columns x 332 rows
2-byte integer
big endian byte order
scaled by 10.

0-1000 ice concentration (divide by 10 to get percent sea ice)
-10000 coast
-9999  land

