On Nov 15, 9:57*pm, Alastair wrote:
On Nov 15, 4:22*pm, James Brown
wrote:

http://nsidc.org/data/seaice_index/i...timeseries.png
--
James Brown

Not according to this chart:http://arctic-roos.org/observations/...ice/observatio...

Cheers, Alastair.

Arctic ROOS is a shorter data set, has different data sources, often
deviates from NSIDC/Cryosphere and the temporarily (permanently)
defunct IJIS data. I wouldn't use it as a benchmark. I'd stick to
NSIDC/Cryosphere to make comparisons to past years and for quite a few
years yet. You can see the pretty wild variations in Arctic ROOS' data
from your graph.

in addition, (not you Alastair, I know you were just poining to a
different dataset) commenting (on ice cover in the middle of the
freeze, or melt season when it deviates from other years really is
like telling us about the weather. These unusual deviations do occur
and April 2010, when ice cover melted much more slowly than usual. was
a classic example and got Watts and other deniers salivating. It's
almost certainly down to synoptics, or possibly warmer water and it is
highly likely to return to it's recent pattern soon. James has done a
Larry/April 2010 here.