Each of these changes in the Arctic could have an impact on the system of ocean circulation. This circulation relies on the different densities of water based on their heat and salt levels. In the Arctic, colder saltier water sinks rapidly, creating a pull effect that drives the ocean conveyor. Each of the changes listed on this map would make the surface waters of the Arctic Ocean less dense, either by making it less salty or warmer. This includes increased freshwater input from melting icecaps and flow from rivers; general warming of the Arctic ocean; and the decrease in hyper-saline surface waters caused by sea ice formation.
Part of:AXA Ocean Education
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Geography | Ages 11-14
The Frozen Oceans Geography resources are designed to take 11-14 year-olds on a journey to the Arctic following the expedition team of the Catlin Arctic Survey.
Geography | Ages 14-16
This Frozen Oceans education resource includes two data case studies that introduce students to ocean acidification and sea ice thickness. The core of each case study are data sets from real expeditions.