The following NASA Temperature chart may seem controversial, in that it starts from 1951. Its arraignment is based on the logical reasoning there wasnβt a great deal of coverage of official weather stations placed, to make world measurements until this period.
My investigation to try and reinvent the temperature wheel may well turn out to be regarded as a folly, but I wonβt let that get in the way of trying. First observation is that the calculation of a baseline results in a zero, in that, whatever you are trying to use as a point of reference starts at zero.
This is a 60 year base, from 1951-2010, to measure how much has changed during the period/decade 2011-2020. The result is 0.62C. I would argue that the interpretation of this analysis is that there has been an average increase of approximately 0.1C per decade. However
@grok informs me that I should demonstrate previous decadal measurements. So, with that in mind, and not trying to bore everyone, Iβve done this with the respective decadal data using 50, 40, 30, 20 year baselines.
In summary over the past 60 years our planet has warmed by at least 0.62C. Any other calculations are based on guess work, however my apologies in advance if people were recording data in the Amazon Jungle, deepest Africa or the Antarctic prior to the 1950βs.
Those of you will note the content of the following baseline uses different data to the top table, this is because a base makes a readjustment each time itβs used. So the next base, for 70 years, will change the current measurement of 0.62c to a lower figure.
The sixty million dollar question is, what is it thatβs being measured. I have no doubt itβs not the effect of man made CO2, CO2 on its own maybe, but my guess itβs Water Vapour.