The Azimuth Project
Arctic sea ice (Rev #8)



The Arctic sea ice consists of polar ice packs:

Polar ice packs are large areas of pack ice formed from seawater in the Earth’s polar regions, known as polar ice caps: the Arctic ice pack or Arctic ice cap of the Arctic ocean.

Here is an map showing the decreases over a 30 year period with the minimum ice in red which happened in 2007:

arctic sea ice

Here is a graph of annual minimum Arctic sea ice area from 1979 to 2011, based on NSDIC? data. Click for details:

Here is a graph of the annual minimum Arctic sea ice volume each year from 1979 to 2011, based on data from Pan-Arctic Ice Ocean Modeling and Assimilation System—click for details:

Here’s a graph of Arctic sea ice volume created by the PIOMAS team, perhaps showing almost the same data in a somewhat different way. Click to enlarge:

The blue line is the linear best fit, but you can see it’s been melting faster lately. Is this a glitch or a new trend? Time will tell.

2011 is considerably worse than 2007, the previous record-holder. Here you can clearly see the estimated total volume in thousands of cubic kilometers, and how it changes with the seasons:


Current state

Arctic Report Card from NOOA (2 minutes) also under Creative Commmons licence:

Climate change effects