Unisys Weather has implemented a new colour scheme for the sea surface temperature anomaly (SST Anom). I did see some mention of this in comments elsewhere (WUWT?) but didn’t bother to look until MWhite in comments on the previous post linked to the normal chart: Note the link highlighted in yellow on the picture “SST Anom New”. They’ve replaced the old scale with, in some ways, a more sensible one, with a dramatic change at zero – from cool green to a warm yellow to give that warmer feel. Here are the two compared:
It is actually more appropriate and the difference between positive and negative anomalies is now clear, but, on my screen at least, it is hard to tell the difference between the shades of yellow. The dark blue and indigo are also indistinct. Why lose the green, or indeed why lose all the green? It seems to me it would have been equally clear with a couple of the turquoise shades removed and the change at zero being green. Or else shift the green to just below zero and lose some of the extreme negative red colour.
The effect of the distinct yellow/blue boundary does highlight the extensiveness of the positive anomaly, but just keep your eye on the blue bits around Antarctica. Summer is over in the Southern Hemisphere and Winter approaches, while for us it has been reluctant to leave.