It’s not very often that the world’s leading estimates of global temperatures all have a full complement of up to date monthly data as they have at the end of December 2022. Not a lot of people know this but there are two things that all of these temperature series have in common, and that is (a) they have all been rising at a similar rate of between 1.96°C and 2.4°C per hundred years over the last 30 years, and (b) they have all ‘tripled dipped’ since 2016. No one seems to want to mention the ‘triple dip’ and the fact that global temperatures are little higher than they were back in 2015, but that’s another story. The anomalies in each of the series are also alarmingly different in magnitude as you can see in each of the six graphs. This is down to how they are calculated and more importantly which LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO. they choose to calculate the anomalies with. I suppose the important thing is that the shape of the 12 month moving average line series are similar, and the linear trend for the last 30 years in each of them is similar too.