A reader writes… why don’t I write about the Arctic sea ice? The answer is, what is there to say that others haven’t already? Cryosphere today seems to be a good source, from which my graph is taken. Actually there is something to say which others don’t seem to, which is “don’t get too carried away with one years anomaly”. 2007 is exceptional; so was 1995 which wasn’t exceeded until 2005.
[Update: oh dear, Ctoday have now corrected themselves: the Ant ice *wasn't* quite a maximum after all: Correction: we had previously reported that there had been a new SH historic maximum ice area. Unfortunately, we found a small glitch in our software. The timeseries have now been corrected and are showing that we are very close to, but not yet, a new historic maximum sea ice area for the Southern Hemisphere. -W]
The other thing to say, now that RP Sr is orf, is that the Antarctic ice has hit a record (since 1979) max: The Southern Hemisphere sea ice area has broken the previous maximum of 16.03 million sq. km and is currently at 16.26 million sq. km. This represents an increase of about 1.4% above the previous SH ice area record high. The observed sea ice record in the Southern Hemisphere (1979-present) is not as long as the Northern Hemisphere. Prior to the satellite era, direct observations of the SH sea ice edge were sporadic. Seems fair enough. Sea ice is “supposed” to be declining in the SH according to the GCMs, but not by much, so this isn’t desperately anomalous. But it is a bit.