By Steve Goddard
The Arctic is still running well below freezing, and as a result there just isn’t much happening, except for an odd discrepancy that has developed between NSIDC and NORSEX related to the 2007 extent. Read on.
The animation video above (generated from UIUC images) shows the entire month of May to date, and as you can see we have yet to see any melt in the Arctic Basin.
The little melt which has occurred since the winter peak has been at lower latitudes, as can be seen in red in the modified NSIDC map below.
The equivalent map below shows changes over the last week. Melt is proceeding very slowly.
The animation below shows Arctic temperatures over the last month. Note that they have alternated between a little above normal and a little below normal. The video was generated from NOAA maps.
More interesting is what is going at the South Pole. GISS says the South Pole has been cold, while NOAA says the South Pole has been hot.
GISS April Antarctica
NOAA almost always shows the South Pole hot for some reason. Temperatures in Vostok averaged -90F in April and a balmy -85F so far in May. It only needs to warm up another 117 degrees to start Hansen’s Antarctic meltdown.
This time of year there is almost no year over year variation in extent, as can be seen in the DMI graph below.
What is interesting is that NORSEX shows 2010 extent well above 2007, while NSIDC shows it below 2007.
The four major ice extent indices continue to diverge.
Another interesting observation is that JAXA has changed their graphs. They used to show a weird little bump on June 1 of every year.
JAXA May 2 graph
But that bump has disappeared.
I hope the Polar bears aren’t disappointed at the loss of their little June 1 mogul. NSIDC anomalies can be seen below in the modified NSIDC map. The Alaska side has above normal sea ice and the Greenland side has below normal sea ice.
This is a reflection of ocean temperatures, which are below normal in the North Pacific, and above normal near Greenland.
We are still about six weeks away from anything interesting happening in the Arctic. Stay tuned.