“Examination of several proxy records (e.g., sediment cores) of sea ice indicate ice-free or near ice-free summer conditions for at least some time during the period of 15,000 to 5,000 years ago”
The Polar Bears must gave gone extinct (or mated with Grizzlies.)
http://www.bbc.co.uk/news/science-environment-13002706
“Scientists who predicted a few years ago that Arctic summers could be ice-free by 2013 now say summer sea ice will probably be gone in this decade.”
Looks like Walt is the voice of reason here.
Andy
Where is here?
DISINFORMATION?
Here is evidence of an ice-free Arctic Ocean during the last 11,000 years.
http://dx.doi.org/10.1016/j.quascirev.2010.08.016
http://adsabs.harvard.edu/abs/2007AGUFMPP11A0203F
http://geology.geoscienceworld.org/cgi/content/abstract/21/3/227
Hi Steven, heres PIPS ice data for apr 1´sts 1999-2011.
Pixels has been counted using mypixelpal software.
http://hidethedecline.eu/media/DK/PIPSapr12011.jpg
The jump in recent years for especially the thick ice above 2 or 2,5 meters is stunning.
The illustration i used is fig 10 from:
http://journals.ametsoc.org/doi/pdf/10.1175/1520-0450%282001%29040%3C0741%3AADYOTO%3E2.0.CO%3B2
Note: The unit “1000 km2” is not precise. lower latitudes are slightly underrepresented. However, the ice within the Arctic ocean itself has only small error due to this. There fore especially trends of thicker ice are useful.
K.R. Frank
PS:
Greenland Summit 2011 mar 19 hekd against limits of Summit temperatures 1987-99:
http://www.klimadebat.dk/forum/vedhaeftninger/summitmar2011.jpg
However, Wunderground did not have -66, only – 61 for Summit. Still this is 212 K, and this appears slightly lower than min 1987-99
wops, the lines switched sequence 🙂