I missed doing a Sea Ice News last week due to being a bit discombobulated with family health issues which have now thankfully been resolved, so I’ll pick up here with a new report.
The news this week is that Arctic sea ice formation has slowed:
As you can see above, after making a very fast recovery during most of October, it is now pacing the 2007 rate. This isn’t terribly unusual, as you can see a “choke point” beginning in early November where the rates of formation start to converge. Right now the JAXA daily data report is passing the 8 million square kilometer mark a value of:
Earlier this week, there was some concern that there may be a sensor issue of some sort, particularly when comparing and I asked NSIDC’s Dr. Walt Meier about it, see:
Compare this NSIDC Arctic Sea Ice extent chart…
…with this from Cryosphere Today:
It certainly appears that there is more ice in 2010 than 2007 on the Cryosphere Today page. Dr. Meier seems to think that the 2007 map from CT is missing some ice, as NSIDC’s comparison between the dates doesn’t appear off as much as the CT images. Walt’s point is:
There is more ice in the central Arctic this year, but less in the Beaufort Sea, Canadian Archipelago, and Baffin Bay. These areas roughly balance each other out.
Reader Lee Kington provides this blink comparator version of NSIDC’s images:
In other news, Antarctic ice continues to be significantly above normal:
For more maps and graphs, see the WUWT Sea Ice Page