From these sources:
en.wikipedia.org/wiki/Paleoclimatology
2100 SAR IPCC projection for emissions scenario A1B
www.ipcc.ch/ipccreports/tar/wg1/353.htm#fig913

Earth's Hot Past Could Be Prologue to Future Climate
ScienceDaily (Jan. 14, 2011) — The magnitude of climate change during Earth's deep past suggests that future temperatures may eventually rise far more than projected if society continues its pace of emitting greenhouse gases, a new analysis concludes.

www.sciencedaily.com/releases/2011/01/110113141607.htm

Let me make sure I understand correctly. The author acknowledges that 30 million to 100 million years ago temperatures averaged 29 degrees warmer than today. Yet we are supposed to be alarmed at the fraction of a degree rise we've seen in the last 100 years or so and also swallow that this rise is caused by our production of benign CO2? What sort of Hummers were the dinos driving 100 million years ago?

I think maybe this article (intentionally?) confuses cause and effect. The ice core data consistently demonstrate that C02 increases result from warming, not the other way around.

jdeere5220 wrote:


You missed the whole point of the article. First off he never said you should be alarmed, that is left to your common sense or lack thereof to determine whether alarm is appropriate. Second, over the last "100 years or so" temperatures have risen 2F not a fraction of a degree and this fact was never discussed in the article anyway. Third, he didn't "acknowledge" that temperatures were 29F higher, he is reporting this based on his calculations.

The point of his article is the potential for CO2 induced warming beyond the relatively short timeframe of computer model projections (which are typically less than 200 years), which he says will be on the order of twice what the computer models predict over the shorter term.

As for CO2 causing warming, he made no case for this as it is already an established fact. And yes, warming also causes increases in CO2. In the case of natural climate changes of the past, it is this positive feedback (initiated by hotter temperatures caused by changes in earths orbit) that makes large swings in the climate temperature possible between glacial periods. Earth gets hotter which releases more CO2, which makes earth hotter still. Those interglacial swings, and all the resulting sea level and climate changes, are about 11 degrees F (6C). So you figure out whether putting as much CO2 into the atmosphere as existed 35 millions years ago when the earth was 29F hotter is a good idea or not.

Why does anybody respond to this guy. Just stop and he may go away.

rb62 wrote:


He provides entertainment with his constant agitation.
He seems to have not enough to do after writing articles for Science Daily.

I gave you positive karma rb62.
Somebody gave you negative karma.
Wonder who?
HF

www.vcrisis.com/index.php?content=letters/200703100726

Snip:
Lacking credible evidence to prove their point the global warming fraternity has developed a political clout comparable to the coming apocalypses it insists in predicting. Geology teaches us that earth has undergone many periods of warming and cooling. In fact the geological record contains evidence of this cycle when man wasn't even around.
Snip:

rb62 wrote:


I think the mayor made that perfectly clear to me a few short weeks ago

They may even share a common keyboard

But for sure the bickering and bullshit, generates web site hits - and those lead to web site cash generation.

For all of our hosts green prophet posturing -- this is simple Republican free enterprise at work.

Well, it's official...gw IS killing penquins. Seems the scientists put wing tags on the penguins for identification during testing and tracking. Dang tags lowered the birds fertility rates and yes, did cause the death of some penquins. So see, gw does kill...if only by proxy and in the name of science...

And gee Harrison, someone gave you negative karma...and I gave you positive to counter...wonder how long it will be before my karma takes a hit??

Providing more hits, that's me!
Whatever happens, it will be difficult to match Sting's karma.
How do you heat your home, Occam?

Science 28 January 2011:
Vol. 331 no. 6016 pp. 450-453
DOI: 10.1126/science.1197397

Enhanced Modern Heat Transfer to the Arctic by Warm Atlantic Water

The Arctic is responding more rapidly to global warming than most other areas on our planet. Northward-flowing Atlantic Water is the major means of heat advection toward the Arctic and strongly affects the sea ice distribution. Records of its natural variability are critical for the understanding of feedback mechanisms and the future of the Arctic climate system, but continuous historical records reach back only ~150 years. Here, we present a multidecadal-scale record of ocean temperature variations during the past 2000 years, derived from marine sediments off Western Svalbard (79°N). We find that early–21st-century temperatures of Atlantic Water entering the Arctic Ocean are unprecedented over the past 2000 years and are presumably linked to the Arctic amplification of global warming.

www.sciencemag.org/content/331/6016/450.short


Fig. 3 Planktic foraminiferal data and temperature reconstructions of upper Atlantic Water in the eastern Fram Strait over the past ~2100 years from sediment core MSM5/5-712-1.