From Barrow Strait to Barrow Alaska Sea ice gives the same interesting horizons.

After hitting play,  place mouse Cursor tip at sea ice
  horizon center, leave it alone and enjoy the
 shifting.   (2007-2008) 

U of Alaska Barrow webcam says it all.  Even a plain webcam easily demonstrates the shifting horizon between ice "seasons",  there are likely more than 11...   After watching the video above and or any other well done sequences.  You may realize the seasons namely:  1- Pre first fast ice ice ultra low horizon   2-Freeze up horizon ,  3- Thin ice ice horizon,  4-  Dark season ice,  5- Sunrise horizon 6-Great late winter horizon ice, 7-Great Diurnal shifting horizon ice,  8-"First Melt" astronomical horizon ice,  9- Melt Pond horizon ice,  10- Mixed water and ice horizons,11- open sea water horizons.  WD June 5,2015