A previous post was about UAH lower troposphere and polar temperatures, so it is logical to look at Hadcrut3 in the same way.
To some degree this is not fair, the gridding is 5 instead of the 2.5 degree of satellite, it is also from ground stations, where spatial coverage is dreadful. That though is supposed to be fixed by fancy math… except it cannot be done. (I’ll explain why if anyone really wants boredom)
Never mind, we have what we have and that is the best the authors could do.
Quite what happened during WW1 in the far north is a question.
In a general sense the data has many obvious problems, so once again treat what is purported to be a long record with great caution.
Now lets ignore pre-satellite and see how Hadcrut3 compares with UAH.
I’ve rescaled the Y-axis what was shown previously to the same as the Hadcrut3 plot.
A few features are the same and broadly it is the same for the satellite period. I view this as “it had better jolly well match”.
I’ll now move on to something additional I did not show before.
These agree quite well apart from the obvious such as no data.
A point of interest is around 60S (-60) where the Antarctica circumpolar current and atmospheric equivalent are showing.
A lot of good stuff around the net on CP.
Both datasets are even, meaning there is no zero latitude band, only one either side. Here I have correlated the mean of the two either side of zero, the equator, with each individual latitude.
This means that in an average sense the tropical region is homogenous but there is little commonality as you move towards the poles. Just a lot of noise, weather.
I first looked at this a some time ago, wondering whether heat flow from the equator to poles could be found this way. that work included time lagging the data. As they say, no dice. Might be there if better time resolution was available, but essentially weather noise dominates. It can be seen in the Hovmoller diagrams. (I have shown these elsewhere and RSS show some)
Like this, the sideway U or V shape from eg. El Nino events.
External image sources are linked, click on images. As usual I wish to thank the authors.