September Arctic sea ice extent: 1935-2014 - Arctic Sea Ice
Arctic Sea Ice extent is the highest since 2009, now above 14 million square kilometers. On the other side of the pond, Antarctic Sea Ice at an all-time low. » Severe Weather Europe
Arctic ice pack - Wikipedia
Sea Ice Extent: Polar Portal
Arctic sea ice hits second-smallest summer extent on record | Ars Technica
The Melting Artic: Witnessing Climate Change History
Guest post: Deciphering the rise and fall of Antarctic sea ice extent - Carbon Brief
Polar Vortex Grows Arctic Sea Ice to 10-Year High, but There's a Catch | The Weather Channel
Unexceptional Arctic sea ice maximum in 2020 | NOAA Climate.gov
Measurement of sea ice - Wikipedia
Perspectives on the Arctic's Shrinking Sea-Ice Cover | Science
Arctic Sea Ice Reaches Second-Lowest Extent
Sea ice | Formation, Extent, & Facts | Britannica
Sea Ice
Arctic Sea Ice Extent Second Highest in 18 Years at the end of 2021, Now Close to 13 million square kilometers, while the Hudson Bay Finally Froze in the Last 2 weeks