Fresh ice had too much salt, fresh snow had none, whereas older sea ice was just right. (alivebynature.com)
Major features are southwestward advection of older sea ice into the Beaufort Gyre and southwestward advection of different sea ice types toward Fram Strait in the Transpolar Drift. (searcharcticscience.org)
The Arctic now has seven times less old sea ice than it did 30 years ago. (scientificamerican.com)