Jo Nova has published an interesting graph on her website as well as publishing it as an advertisement in The Australian newspaper.
The we have a standard meteorological thermometer for use in a Stephenson Screen
The thermometer has temperature marks repeated at 0.5 Degrees Celsius intervals, so the most accurate reading would be 0.5 +/-0.25 degrees Celsius, or half the distance in the white spaces between the lines.
Note that the balloon and satellite datasets have a variation of +/- ~ 0.15 Degrees Celsius.
You cannot read a meteorological thermometer to that accuracy.
The measured temperature variation is less than the intrinsic error of the thermometer; it is thus a mathematical artefact and hence spurious.
Put in other words, there has not been any global warming during the period covered by the datasets.
So what is going on, part from an infatuation with numerology?
When belief trumps physical reality, then we are dealing with pathological science.