The National Snow and Ice Data Center is one of the key organizations in tracking sea ice coverage. Yes, this is the same organization that thought an ice-free polar region was possible by September of 2008. It appears that they have had sensor issues that have caused them to incorrectly report some sea areas ice-free when they were actually ice-covered. They have reported that they have under-reported ice coverage by 500,000 square kilometers. NSIDC has removed their invalid data and are searching for other data sets to find accurate information.
Sea ice is currently tracking higher than the previous 4 years.
Posted under Climate