Earlier quoted context omitted.
are you familiar with the blog made by tony heller (also on youtube) ? He regularely points out those exact same remark. I am very careful to wait until other people confirms that there is indeed a methodological problem before jumping to conclusion, but it really sounds very interesting.
I read Heller's blog. I've also done a bit of double checking of his work because indeed, what he keeps uncovering is extremely interesting and should I feel really have been discussed in popular journalism about climate before now. I want to check more of his claims in future. But for now, I only checked how many data points in the NOAA US temperature dataset are now the output of model simulations and not actual me…
ftp://sidads.colorado.edu/DATASETS/NOAA/G02186/
Used masie_4km_allyears_extent_sqkm.csv to plot it.
It looks like this:
https://i.imgur.com/9kNtYbI.png
Another source which confirms this too:
June 22, 2008:
http://ocean.dmi.dk/arctic/icethickness/images/FullSize_CICE...
June 22, 2014:
http://ocean.dmi.dk/arctic/icethickness/images/FullSize_CICE...
June 22, 2018:
http://ocean.dmi.dk/arctic/icethickness/images/FullSize_CICE...