Thank you Zack. But how oceans are treated in the #ClimateShiftIndex is a different matter.
The scale to ±5 for land temperatures doesn't sound comprehensive enough.
Just because I have it on disk from a different question yesterday, here are Potsdam's days with maximum temperatures above 30°C since 1893.
Getting 19 days per year like nowadays is a 4 on the CSI, am I correct?
But it peaks at 6 times more often than in the beginning of the time series. See 2018 and 2019 with 32 and 28 days.
On a scale of ±1 to ±5, people in Potsdam won't see any change from 5 anymore very soon. I mean, the information CSI could give them is lost because it'll be a 5 every time they look at CSI.
Of course, there'll be a good reason for why Climate Central has cut off the scale at 5.
Maybe, it'll be worth it to put up an explanation for the cut off in the FAQ?