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originally posted by: nenothtu
I'm also aware that throughout Earth's entire history, with only one notable exception before the current time, CO2 levels have ALWAYS been higher, and generally MUCH higher, than they are now. The argument that the other side is making is that Earth's history is entirely irrelevant - until you get to the Ice Ages.
The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels and creating numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites and rudists, while dinosaurs continued to dominate on land
Humans evolved from a lineage of upright-walking apes whose earliest fossils date from over 6 million years ago.[82]
Then it suddenly becomes relevant, and we can start calling it "pre-industrial" for purposes of CO2 comparison. The other 99.9+ percent of Earth's history suddenly do not matter. That was somehow not "pre-industrial".
There are reasons for all of these verbal manipulations intended to promote the notion of "industrial" (i.e "bad") and "pre-industrial" (i.e. "good"), and limiting the "good" and "pre-industrial" to a time frame that is politically expedient.
originally posted by: nenothtu
originally posted by: mbkennel
originally posted by: nenothtu
When does the "pre-industrial" figure you cite come from? What year? An approximate year will do -and what percentage of the 4.5 billion years or so of Earth's existence does that tiny span account for?
Pre-industrial CO2 in this field means the level which existed from the end of the previous Ice Age, to about 1750.
It's a small percentage of Earth's geological history and the entirety of human civilization.
Appealing to "dinosaurs and plants were around when CO2 was higher" is completely and dangerously irrelevant to appropriate behavior by humans NOW, at least as irrelevant as a shark's diet is to human health recommendations.
Exactly as I said above - the opposition is promoting the dangerous notion that only ice ages are now "relevant", and the remaining 99.9+ percent of Earth's history is somehow not relevant to Earth. Not only is the rest of Earth's history "not relevant" to them, it now appears to be "dangerously irrelevant".
So tell me, how are living organisms "irrelevant" to life? Why are the aberrations of ice ages the only "relevant" time to consider?
How does a "shark's diet" figure into this at all? Do they eat CO2 and excrete O2 or something?
Appealing to "dinosaurs and plants were around when CO2 was higher" is completely and dangerously irrelevant to appropriate behavior by humans NOW, at least as irrelevant as a shark's diet is to human health recommendations
originally posted by: raymundoko
a reply to: mbkennel
A poor analogy.
Do you suggest that humans will go extinct because the planet warms by 6 degrees?
originally posted by: mbkennel
1) Humans didn't exist until recently, and civilization dependent on agriculture, even more recently still, and such civilization using a signifcant fraction of the planet's arable land even less, and 9 billion people even less still.
You don't recognize the enormous time intervals of geological history. 100 million years ago, the continents were in different places, and many classes of animals now didn't exist then and vice versa. There were barely mammals. And 100 million years is a small fraction of the 4.6 billion age of the Earth.
Let's see 100 million years ago:
- - -
The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels and creating numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites and rudists, while dinosaurs continued to dominate on land
- - -
What about humans?
- - -
Humans evolved from a lineage of upright-walking apes whose earliest fossils date from over 6 million years ago.[82]
- - -
6 millino years is really small and back then proto-human brains were the size of chimps's.
2) The Sun had lower output over large geological times. This is very significant meaning that with the same CO2 today as then, it would be significantly hotter today than in the past.
"Then it suddenly becomes relevant, and we can start calling it "pre-industrial" for purposes of CO2 comparison. The other 99.9+ percent of Earth's history suddenly do not matter. That was somehow not "pre-industrial"."
- - -
They do not matter for human policy purposes!
There are reasons for all of these verbal manipulations intended to promote the notion of "industrial" (i.e "bad") and "pre-industrial" (i.e. "good"), and limiting the "good" and "pre-industrial" to a time frame that is politically expedient.
So the Cretaceous was about 4 degrees C warmer. We're going to get 4 degrees C easy with current rate without changes and maybe 6 to 8. That's absolutely ENORMOUS change in 150 years.
originally posted by: mbkennel
The question is not whether organisms will live (obviously) the question is whether human civilization will collapse or be seriously wounded as a result of human greed and stupidity.
Living organisms will survive global thermonuclear war. Still makes self-nuking ourselves a stupendously poor idea and nobody uses the survival of cockroaches as reason to "not worry about it and just get used to adaptation".
It's an analogy.
"Appealing to "dinosaurs and plants were around when CO2 was higher" is completely and dangerously irrelevant to appropriate behavior by humans NOW, at least as irrelevant as a shark's diet is to human health recommendations"
originally posted by: Semicollegiate
originally posted by: defcon5
originally posted by: FarleyWayne
IN CASE YOU MISSED IT ... ( March 2007 )
Warming On Jupiter, Mars, Pluto, Neptune's Moon & Earth Linked to Increased Solar Activity, Scientists Say
To my knowledge, that's been disproven:
The whole solar system could be moving through warmer outer space.
or a changing gravity gradient.
originally posted by: mbkennel
Extinct? Literally, no. Collapse of significant technological civilization supporting 9 billion people in comfort, quite possibly yes.
Major wars, famines, disasters, droughts, possibly. A collapse like going from the height of the Roman Empire (say Aurelius) to the Dark Ages.
6 degrees C is a titanic climate change as a global average.
The Ice Ages were 4-6 degrees C colder than preindustrial civilizatnion.
There was almost no agriculture then. Ice was miles thick in New York. What do you think a Heat Age in the other direction might be like?
originally posted by: MystikMushroom
originally posted by: Semicollegiate
originally posted by: defcon5
originally posted by: FarleyWayne
IN CASE YOU MISSED IT ... ( March 2007 )
Warming On Jupiter, Mars, Pluto, Neptune's Moon & Earth Linked to Increased Solar Activity, Scientists Say
To my knowledge, that's been disproven:
The whole solar system could be moving through warmer outer space.
or a changing gravity gradient.
Wat?
I have never heard this before. Does this make sense to anyone else?
originally posted by: jrod
Why can't we see your resident time calculations? You claim to be an expert, therefore it should be easy for you to provide ATS with your resident time calculations(Need to see the work)?
originally posted by: raymundoko
Your request is absurd and unnecessary, we've gone over this. Still no comment on the peer reviewed papers?
a reply to: jrod
originally posted by: Phage
Please learn what the term temperature anomaly means and how it is calculated. (Hint, it is not the same as absolute temperatures). After having done so, revisit that idiotic blog. 2012 was the hottest year in North America on record.
You see, understanding the terms helps go a long way in understanding the science. The same applies to what the term heat wave index actually means. Yes, the heat waves of the 1930's have not been matched. But that's weather, not climate.
For how long has records been taken? 200 years? That is nothing in the big scheme of things.