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Comment by m52go | Hacker News Reader

Big props for taking one for the team.

Becoming critical of "climate change" just happened to me recently. I've been critical of the usual suspects like foreign policy, finance, media, etc. for a while, but climate change was a sacred cow.

Then I read this.

https://www.fairobserver.com/more/environment/forgotten-sun-...

Before anyone accuses me of bringing scientism onto HN, realize that never did I call climate change a "hoax." Most intelligent people critical of climate change don't either. Obviously, it's happening...to some degree. I'm merely critical of the mainstream perspective of its causes and effects.

And I'm not sure one can ever be too critical in science.

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this article is from 2012 and its prediction did not come true: http://www.realclimate.org/images/Vahrenholt_en-600x452.jpg

source is this solid rebuttal: http://www.countercurrents.org/2016/11/15/record-heat-despit...

The speed of the current change is unprecedented. Your article makes the standard argument that climate changes in the past and this is more of the same, but it's just not true.

Xkcd summed it up nicely: https://xkcd.com/1732/

Xkcd's chart starts a mere 22,000 years ago.

It is not representative of the history of the Earth.

To take just one example, I'm pretty sure that the sudden arrival of the Chicxulub "dinosaur killer" asteroid produced a change in Earth's climate that was vastly more devastating and immensely more rapid than anything we're seeing today.

"Unprecedented", indeed.

Edit: added a few references.

http://www.sciencedirect.com/science/article/pii/S0277379104...

"We revisit the portion of (Nature 391 (1998) 141) devoted to the abrupt temperature increase reconstruction at the Younger Dryas/Preboreal transition...Three quasi-independent approaches employed in this work all give the same result of a +10 °C warming in several decades or less."

http://www.sciencedirect.com/science/article/pii/S0012821X08...

"Here, we report on the second abrupt warming (4 ± 1.5 °C), which occurred at the end of a short lived cooler interval known as the Preboreal Oscillation (11,270 ± 30 B.P.). A rapid snow accumulation increase suggests that the climatic transition may have occurred within a few years."

One ten degree event and one 4 degree event. Both much larger than anything we've seen.

There have been many others. In fact, it is believed that at least 25 such events took place in the last glacial period alone. See: https://en.wikipedia.org/wiki/Dansgaard%E2%80%93Oeschger_eve...

Thanks for the links. I guess I should have said unprecedented within the timescale in question. Note that the link you provided above only discusses the last 10,000 years, so the xkcd timeline is more than adequate when discussing its particular claims.

I'd like to know what you think about my sibling comment, about how this five-year-old article makes a prediction that has already failed. In particular, the article talks about how the 0.8C warming since 1850 fits their hypothesis... but warming has continued quite rapidly since that article was written, so if you wrote that today you'd have to talk about ~1.4C warming since 1850. Does that still fit?

Finally, although it's not relevant to your overall argument, I have to say that Chicxulub is the worst argument I've seen in this space for quite a long time.

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