In 1999, the New York Times said Arctic sea ice thickness had declined from ten feet to six feet since 1958. In 1958, the New York Times said Arctic sea ice thickness had declined from twelve feet to seven feet since 1908.
TimesMachine: November 17, 1999 – NYTimes.com
The Changing Face of the Arctic; The Changing Face of the Arctic – The New York Times
Current thickness is about seven feet – the same as 1958.
