If there were such a thing as "Global Average Temperature " how would we measure it? Could that determine public understanding of science regarding Climate Changes?

"Global Average Mean Temperature"

Sounds legit right?

Not so fast, getting such a figure of any worthwhile accuracy is frought with practical limitations. So many limitations as to render it a nonsense concept in every practical sense.

Here is a good case against the reasoning put forward to create a weaponised principle for use in the Climate Change propaganda arsenal.

This is English version I'm hosting of the Danish
original (appearing HERE )which proposes:


The global temperature does not exist, and every different strategy to work it out yields a different result. The best merhod is explained and by that we see the temperature has decreased 

(since 2015)

HadCRUT is the dataset of monthly instrumental temperature records formed by combining the sea surface temperature data collected by the Hadley Center at the UK Met Office and the land surface temperature records compiled by the Climatic Research Unit (CRU) at the University of East Anglia. This clearly shows a decreasing temperature trend even though the CO2 concentration in the air has increased in the same period

The CO2 measurements under the auspices of NOAA (National Oceanic and Atmospheric Administration): 

woodfortrees.org is a website that collects temperature data from all the major players involved in this. The HADCRUT data is one of several such temperature data series.

One of the others is RSS (Remote Sensing Systems), which processes NASA's satellite data (from several satellites). These data provide a similar picture:
https://www.woodfortrees.org/plot/rss/from:2015/to:2023/plot/rss/from:2015/to:2023/trend

Perhaps the best satellite data group is at UAH (University of Alabama in Huntsville). I have already mentioned John Christy and Roy Spencer who are particularly known for having developed and been responsible for the operation of satellite measurements of parameters in the atmosphere. They have both worked at UAH in collaboration with NASA. Their satellite data has been verified several times by comparing the data with temperature measurements from weather balloons (we therefore have two independent systems). The plot from the RSS data also gives us a downward trend:
https://www.woodfortrees.org/plot/uah6/from:2015/to:2023/plot/uah6/from:2015/to:2023/trend

Note that satellite data has a much better coverage of the earth than ground measurements.
In addition to this, it can be said that neither the sea ice in the Arctic nor the inland ice in Greenland has decreased in recent years (apart from the usual seasonal variations). In fact, an increase has been recorded with both. 

The Danish Meteorological Institute is responsible for monitoring the ice in Greenland. Here we see a clear increase:  https://electroverse.co/ezoimgfmt/i0.wp.com/electroverse.co/wp-content/uploads/2022/08/SMB_curves_LA_EN_20220829-crop.png?w=846&ssl=1&ezimgfmt=ng :webp/ngcb1

The average temperature in the large part of Antarctica has been fairly stable for the last 40 years (You must subscribe to TV2 Play to see the full article): 
https://www.tv2.no/nyheter/innenriks/det-har-vaert-donn-stabilt-i-40-ar/13960869/

The essence of the article is: 

Stable measurements

 

Well, you have good results from 1980 until today, and the measurements of the last 40 years are probably surprising to many. - In some areas we see strong melting, but in the area we are focusing on and which we think is some of the most important areas to study, it is still stable, says Østerhus.

– Du snakker litt mot dommedagesprofetiene nå?

– Ja- Yes, and I hope I'm right, but we can't take that for granted, says the researcher. - The climate models show that something will happen in the areas we measure, but so far we haven't seen any significant changes . The ice shelf we are studying has not become any thinner, quite the opposite, says Østerhus.

 

– Mange snakker om at Antarktis vil smelte, tar de feil?

–  It is true that in some areas the ice is melting. In the north, the sea ice is melting. It does so in Greenland and in parts of Antarctica as well, but what really matters when it comes to sea level rise, luckily it happens very little, the researcher points out. He is cautious about all scaremongering about the climate.

– Som forsker er jeg forsiktig med å komme med slike påstander uten å ha skikkelig god dekning for det. Det tror jeg kan slå kraftig tilbake på oss hvis vi fremstiller det som om at det skjer dramatisk store endringer, sier Østerhus.

Naturlige variasjoner?

– Det kan være naturlige variasjoner bortsett fra i noen områder, forteller han.

I Antarktis er det to gigantiske og svært viktige is-bremmer.

Dette er Ross og Filchner-Ronne, i tillegg til noen mindre.

 An ice brink is typically a few hundred meters thick at the front, and can be as much as 2000 meters thick elsewhere. Inside the continental shelf in the far south of the Weddell Sea, heavy bottom water is formed during the winter when the surface water is cooled to the freezing point and freezes into ice.

Når sjøis blir dannet, frigir isen salt til det omkringliggende vannet. Dette vannet som da blir ekstra salt blir på frysepunktet så tungt at det synker ned til bunnen.

There is far too much activism that characterizes the media image and provides feedback both to politicians and ordinary people. Those who believe this propaganda are those who do not investigate for themselves. The Belgian psychologist Mattias Desmet compares the state of the unsuspecting population and politicians to a psychosis. Humanity has experienced a similar influence mechanism, he says, both during the witch persecutions, under the Hitler regime, Stalin, Mao and the Khmer Rouge. For my own part, I would like to add the Bjugn case.