Richard Black reports for the BBC:
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