A Nasa satellite has documented startling changes in Arctic sea ice cover between 2004 and 2005.
The extent of "perennial" ice - thick ice which remains all year round - declined by 14%, losing an area the size of Pakistan or Turkey.
The last few decades have seen ice cover shrink by about 0.7% per year.
September 2005 saw the lowest recorded area of ice cover since 1978, when satellite records became available.
“The change we see between 2004 and 2005 is enormous.” - Son Nghiem
Thursday, September 14, 2006
'Drastic' shrinkage in Arctic ice
Richard Black reports for the BBC: