That's a lengthy paper, very lengthy and I will not be reading it though I did scan over it, suffice to say the origin of the paper leaves me very suspicious.
For example what exactly is the
Center for Environmental Research and Earth Sciences ?
View attachment 1071810
A headline in the far-right culty conspiracy site Epoch Times recently proclaimed that a study found the “Sun -- not CO2-- may be behind global warming.” A similar story ran in the oft-viral but rarely-right electroverse, also suggesting that really...
www.dailykos.com
But it gets worse, here's more - this guy is one of the authors of the paper you cited:
Newly released documents show the extent of the links between corporate interests and the published work of Wei-Hock Soon, a Smithsonian-affiliated scientist who has tried to debunk the consensus about global warming.
www.nytimes.com
Read all about "Willie" here:
en.wikipedia.org
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So bang goes your street cred, this is abysmal and I'm surprised you thought you could fool me - those two writers who participated in that paper have accepted money from the API !!!!! tell me, how much are they paying you?
en.wikipedia.org
You are advised to post that paper in USMB's
pseudoscience area if we have one here, really, you trumpanzees really will stop at nothing to mislead the gullible.
Climate change denial is fashionable amongst the extreme right, trumpanzees embrace conspiracy theories all the time, stuff like Trump actually won in 2020

and Trump's prosecution and conviction by a jury, of fraud is "politically motivated"

and immigrants are eating pets
You'll have to try harder, you can fool some of the people some of the time, but you can never fool Sherlock Holmes.