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Ancient global warming was jarring, not subtle, study finds
Los Angeles Times ^ | January 5, 2007 | Robert Lee Hotz

Posted on 01/05/2007 9:46:03 AM PST by presidio9

Foreshadowing potential climate chaos to come, early global warming caused unexpectedly severe and erratic temperature swings as rising levels of greenhouse gases helped transform Earth, a team led by researchers at UC Davis said Thursday.

The global transition from ice age to greenhouse 300 million years ago was marked by repeated dips and rises in the amount of carbon dioxide in the atmosphere and wild swings in temperature, with drastic effects on forests and vegetation, the researchers reported in the journal Science.

"It was a real yo-yo," said UC Davis geochemist Isabel Montanez, who led researchers from five universities and the Smithsonian Museum of Natural History in a project funded by the National Science Foundation. "Should we expect similar but faster climate behavior in the future? One has to question whether that is where we are headed."

The provocative insight into planetary climate change counters the traditional view that global warming could be gradual and its regional effects easily anticipated.

Over several million years, carbon dioxide in the ancient atmosphere increased from about 280 parts per million to 2,000 ppm, the same increase that experts expect by the end of this century as remaining reserves of fossil fuels are burned.

No one knows the reason for so much variation in carbon dioxide levels 300 million years ago, but as modern industrial activity continues to pump greenhouse gases into the air at rapid rates, the unpredictable climate changes that took millions of years to unfold naturally could be compressed into a few centuries or less today, several experts said.

Carbon dioxide levels last year reached 380 ppm, rising at almost twice the rate of a decade ago, experts said. Average global temperatures have been rising about 0.36 of a degree Fahrenheit per decade for the last 30 years.

Still, the transformation

(Excerpt) Read more at latimes.com ...


TOPICS: Culture/Society; Miscellaneous
KEYWORDS: artbell; climatechange; globalfraud; globalwarming; junkscience; whateverwesayitmeans
Navigation: use the links below to view more comments.
first 1-5051-64 next last

1 posted on 01/05/2007 9:46:05 AM PST by presidio9
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To: presidio9
Foreshadowing potential climate chaos to come, early global warming caused

Past performance is not indicative of future results.

2 posted on 01/05/2007 9:47:21 AM PST by Izzy Dunne (Hello, I'm a TAGLINE virus. Please help me spread by copying me into YOUR tag line.)
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To: Izzy Dunne

Stupid Dinosaurs. Wiped themselves out buring fossil fuels, only to become fossils themselves.


3 posted on 01/05/2007 9:51:39 AM PST by presidio9 (Islam is as Islam does.)
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To: presidio9

".....Average global temperatures have been rising about 0.36 of a degree Fahrenheit per decade for the last 30 years."

But have not risen further since 1998. And actually, the "average global temperatures" have been rising since before the turn of the century, before world industrialization took off. But no matter, it must have been all those logs people burned to keep warm.


4 posted on 01/05/2007 9:57:14 AM PST by Wuli
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To: presidio9

This still fails to explain why CO2 levels were higher in the first half of the 20th century, but overall temeperatures were cooler during the same period. I don't believe that they can correlate the data between CO2 and global temperature levels.

In addition, the average temperature rise of .36 degrees F per decade for the last 30 years is also untrue. Satellite temperature measurements have consistently shown the total temperature rise for the last galf of the 20th century was only .1 degrees F.

This article is simply riddled with misinformation and mis-statements.




(Uh-oh, here it comes!)


5 posted on 01/05/2007 9:59:11 AM PST by DustyMoment (FloriDUH - proud inventors of pregnant/hanging chads and judicide!!)
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To: presidio9
Actually in many cases the CO2 increase was after a temperature increase.


<<<-------longer ago --------- more recent-------->>>
<<<------Temperature --------- CO2------->>>
------------------------------------------------------------------------------------------------------------------------------------


<<<-------more recent --------- longer ago-------->>>
<<<------CO2 --------- Temperature------->>>

6 posted on 01/05/2007 9:59:13 AM PST by dynoman (Objectivity is the essence of intelligence. - Marylin vos Savant)
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To: presidio9
The global transition from ice age to greenhouse 300 million years ago was marked by repeated dips and rises in the amount of carbon dioxide in the atmosphere

Those damn cave men and their cars.... I mean... opps.

7 posted on 01/05/2007 10:01:25 AM PST by grobdriver (Let the embeds check the bodies!)
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To: dynoman

what I should say is - "a CO2 change was after a temperature change."


8 posted on 01/05/2007 10:02:06 AM PST by dynoman (Objectivity is the essence of intelligence. - Marylin vos Savant)
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To: presidio9

Oh. Well, I knew that from the opening scenes of "Ice Age."


9 posted on 01/05/2007 10:02:29 AM PST by Froufrou
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To: presidio9

George Bush was around 300 million years ago? That guy is truly amazing.


10 posted on 01/05/2007 10:05:26 AM PST by Argus
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To: presidio9
I find it comical that a scientist is trying to explain the current, alleged, global temperature swing by juxtaposing human civilization with geologic time frames.

Whether it was 300 million years ago or 300 days ago, no human can easily comprehend a process that takes hundreds of thousands...or even thousands of years to manifest.

11 posted on 01/05/2007 10:05:59 AM PST by Bloody Sam Roberts (Did I really need to include the sarcasm tag?)
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To: presidio9
Carbon dioxide levels last year reached 380 ppm, rising at almost twice the rate of a decade ago, experts said. Average global temperatures have been rising about 0.36 of a degree Fahrenheit per decade for the last 30 years.

Not true

12 posted on 01/05/2007 10:06:48 AM PST by cpdiii (Oil Field Trash and proud of it, Geologist, Pilot, Pharmacist, Iconoclast)
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To: DustyMoment

I prefer the nutballs who say "global warming" is caused by methane from cow farts. These are the same lunatics who get tears in their eyes talking about how the plains were black with buffalo before whitey came along and killed them all for their hides. Nope, no disconnect with logic there.


13 posted on 01/05/2007 10:08:02 AM PST by presidio9 (Islam is as Islam does.)
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To: presidio9
...the same increase that experts expect by the end of this century as remaining reserves of fossil fuels are burned.

That's a MSM two-fer! Global warming is going to kill us, AND we're running out of oil!!

14 posted on 01/05/2007 10:22:08 AM PST by Obadiah
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To: presidio9; All
Stupid Dinosaurs. Wiped themselves out burning fossil fuels, only to become fossils themselves.
Unless I'm mistaken, 300 million years ago was well before the age of Dinosaurs––in the Paleozoic.

As for an increase in CO2 during this time, how are these estimates being produced?

There are no ice cores from that era to trap 300 million year old bubble of air so the only thing I can imagine is they are somehow inferring atmosphere from sedimentary rock.

P.S. As for Dinosaurs and global warming, it is now believed that the quality of plant food made fermentation (a tactic used by cows––some of which can sustain a flame) a common necessity to extract value from low-quality plants. As fermentation gains efficiency as scale increases, a big stomach means a big, hungry dinosaur.

But pray tell imagine a 35 to 60 ton cow?

The sheer quantity of fart gas (methane) would have been staggering and such is considered a component of global warming. Add in the termites and more oxygen in the atmosphere and it's easy to see how there could be herd die offs––one lightning strike at the wrong time/place and instant firestorm.

15 posted on 01/05/2007 10:22:46 AM PST by Rurudyne (Standup Philosopher)
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To: presidio9
I can't believe how the entire premise of global warming caused by CO2 increase has been so easily sold to the public. One of the teams involved with the ice core CO2/temperature data was led by French expert Dr. Nicholas Caillon. Here is a link to their research paper;

Timing of Atmospheric CO2 and Antarctic Temperature Changes Across Termination III

In it are tidbits like this;

"The analysis of air bubbles from ice cores has yielded a precise record of atmospheric greenhouse gas concentrations, but the timing of changes in these gases with respect to temperature is not accurately known because of uncertainty in the gas age-ice age difference. We have measured the isotopic composition of argon in air bubbles in the Vostok core during Termination III (-240,000 years before the present). This record most likely reflects the temperature and accumulation change, although the mechanism remains unclear. The sequence of events during Termination III suggests that the CO2 increase lagged Antarctic deglacial warming by 800 ± 200 years and preceded the Northern Hemisphere deglaciation."

"This confirms that CO2 is not the forcing that initially drives the climatic system during a deglaciation. Rather, deglaciation is probably initiated by some insolation forcing (1, 31, 32), which influences first the temperature change in Antarctica (and possibly in part of the Southern Hemisphere) and then the CO2. This sequence of events is still in full agreement with the idea that CO2 plays, through its greenhouse effect, a key role in amplifying the initial orbital forcing. First, the 800-year time lag is short in comparison with the total duration of the temperature and CO2 increases (~5000 years). Second, the CO2 increase clearly precedes the Northern Hemisphere deglaciation."

The Caillon team paper goes on to mention a delay of 800 years "seems to be a reasonable time period to transition from an initial Antartic temperature increase into a CO2 atmospheric increase though oceanic processes". The mechanism might be "a change in vertical ocean mixing", consistent with "a process that involves the deep ocean as its mixing time is close to the observed 800 year lag". They offer cryptic comments like "sequence of events is still in full agreement with the idea that CO2 plays, through its greenhouse effect, a key role in amplifying the initial orbital forcing. "

Ok an "idea", what's that? The absolute objective truth? "The radiative forcing due to CO2 may serve as an amplifier of initial orbital forcing, "

"May"?? What's that, the absolute objective truth?

"Initial orbital forcing"?? What's that? Temperature increasing first?

One more thing the Caillon paper states is that the the 800 year lag cannot rule out any of these mechanisms - "vertical ocean mixing, sea-ice cover changes, or a biological mechanism such as atmospheric dust flux or ocean productivity" - as having sole control of CO2 outgassing.

"Sole control", how about that?
16 posted on 01/05/2007 10:25:15 AM PST by dynoman (Objectivity is the essence of intelligence. - Marylin vos Savant)
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To: Rurudyne
The sheer quantity of fart gas (methane) would have been staggering and such is considered a component of global warming. Add in the termites and more oxygen in the atmosphere and it's easy to see how there could be herd die offs––one lightning strike at the wrong time/place and instant firestorm.

SO THAT'S IT! That's the BIG BANG Theory in a nut shell! The copious amounts of methane gas from dinosaurs ignited the big bang when lightning struck.

Sheer genius!

17 posted on 01/05/2007 10:27:03 AM PST by Obadiah
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To: dynoman

Does anyone realize how large an SUV would have been required to carry 6 full-grown brontosaurs? I have estimated the size of the engine at 3000 cubic inches with 5000 horsepower - and that does not even count the turbos. Typical milage was .10 per gallon and they did not even have catalytic converters.


18 posted on 01/05/2007 10:28:42 AM PST by oncebitten
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To: Rurudyne
Unless I'm mistaken, 300 million years ago was well before the age of Dinosaurs––in the Paleozoic.

Sorry professor.

Stupid trilobites.

19 posted on 01/05/2007 10:32:43 AM PST by presidio9 (Islam is as Islam does.)
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To: Obadiah
More Dresden than Hiroshima, but you've got it.

Or as one friend of mine put it when he read a longer explanation: "That's just WRONG!"

I always think of Henry Blake's quote from the M*A*S*H episode: "It just went 'boom.'"
20 posted on 01/05/2007 10:36:24 AM PST by Rurudyne (Standup Philosopher)
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To: presidio9

21 posted on 01/05/2007 10:38:51 AM PST by msnimje (You simply cannot be Christian and Pro-Abortion.)
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To: presidio9

Dino Gas, just like Gore talks about cow flatulence.


22 posted on 01/05/2007 10:39:16 AM PST by richardtavor (Pray for the peace of Jerusalem in the name of the G-d of Jacob)
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To: oncebitten
Does anyone realize how large an SUV would have been required to carry 6 full-grown brontosaurs? I have estimated the size of the engine at 3000 cubic inches with 5000 horsepower - and that does not even count the turbos. Typical milage was .10 per gallon and they did not even have catalytic converters.
Butt since they wouldn't even have windows that you could roll up (for good reason), there would be some weight savings––maybe enough to get mileage to .101 mpg.

Sigh ... wishes for a time machine to see what feeding broccoli, cauliflower, black beans and garlic would do to a brontosaur....
23 posted on 01/05/2007 10:41:12 AM PST by Rurudyne (Standup Philosopher)
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To: oncebitten
I have estimated the size of the engine at 3000 cubic inches with 5000 horsepower - and that does not even count the turbos. Typical milage was .10 per gallon and they did not even have catalytic converters.

Not even close. Since one apatosaur weiged 40 tons, you looking at multiplying the figures on a normal suv by approximately 500. If the Chevy Tahoe V8 has 325 horsepower has 325hp, then the prehistoric ride would need about 162,000hp. Of course, they wouldn't call it horsepower, as horses hadn't evolved yet.

24 posted on 01/05/2007 10:41:32 AM PST by presidio9 (Islam is as Islam does.)
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To: presidio9

"... Over several million years, carbon dioxide in the ancient atmosphere increased from about 280 parts per million to 2,000 ppm, the same increase that experts expect by the end of this century as remaining reserves of fossil fuels are burned.... "

BS ALERT!!

I consider myself well-read about climate change and nowhere have I come across anyone anywhere who has stated that the amount of carbon dioxide in the atmosphere will approach 2000 ppm. (This doesn't mean that someone hasn't stated it - just that I have not seen it in Scientific American, Science, Nature, or other journals like that.) I just did a quick google and found that even the radical environmentalists are stating that the figure for the end of the century will be 450 to 550 ppm.

The other BS alert: "...as the remaining reserves of fossil fuels are burned..." Talk about hyperbole! All the natural gas, all the oil, all the methane hydrates are gone by the year 2100?

So, in essence, we're all going to die. Which is true for all of us. I won't make it to 2100. I don't think my death will be from global warming, though.

In the meantime, as I turn to me left, I can see the temperature outside my window. It is now -40.9 degrees, about 35 degrees below average for this place and this time of year. Must have something to do with global warming.


25 posted on 01/05/2007 10:45:26 AM PST by redpoll (redpoll)
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To: dynoman

Its terrible - we haven't seen these kinds of temperature increases since 125,000 years ago (and 225,000 and 325,000 and 425,000 years ago).

Luckily I have a $1 million dollar grant that is funding my research into determining if temperture variations are cyclical. Early models are inconclusive and it will no doubt require more time and money.


26 posted on 01/05/2007 10:48:59 AM PST by geopyg (Don't wish for peace, pray for Victory.)
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To: presidio9

Don't dismiss this article, folks, because this is the key to smacking these idiot global-warming certaintists right across their arrogant temples.

Ask them "Why and how did 'Global-like-Warming-man®' happen before man was even around...dude?...Take your time."

Then give them an example that strikes home to these essentially selfish and hypocritical pinheads:

"OK, like dude, man...suppose the city said that there was a smell coming from your neighborhood, 'nd like dude...they kinda figgered it was cuz of your septic tank...'nd cuz-a-that, they're like demanding that you spend what your house is worth to like dig it up and then follow all the potential drain points to like sanitize it...man. But...don't question their judgement on that, man, cuz that would be like totally reactionary...just accept it and dig deep, dude."

We all know what these self-centered and hypocritical schmucks would say.


27 posted on 01/05/2007 10:49:39 AM PST by guitfiddlist (When the 'Rats break out switchblades, it's no time to invoke Robert's Rules.)
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To: presidio9

From all the research I have read I come to a couple of conclusions:

1) Global warming cycles are tied to hundreds of year long solar cycles of the sun.

2) Mankind and all animal life in general benefit as a whole from warmer temps. More food supply.

3) Their is nothing we can do about this. We should be responsible and focus on pollution going into our atmosphere because thier is conclusive proof we have damaged the ozone causing lots more cancer and lung-ilness.


28 posted on 01/05/2007 10:58:16 AM PST by quantfive
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To: Izzy Dunne
chaos
severe and erratic
wild swings
drastic effects
unpredictable
compressed
twice the rate
extreme weather events...appear mild
convulsed
spasm after spasm
followed abruptly
mass extinction.
fever spikes
instability, erratic

A quick list of the fear words in this article. Is this a news article or an editorial?

29 posted on 01/05/2007 10:58:42 AM PST by Terabitten (How is there no anger in the words I hear, only love and mercy, erasing every fear" - Rez Band)
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To: presidio9

The most important line in the article is the very last one:

"It suggests," she said, "that the normal behavior in major climate transitions is instability, erratic temperature behavior and carbon dioxide changes."

Get that? Changes are NORMAL!


30 posted on 01/05/2007 11:01:29 AM PST by Terabitten (How is there no anger in the words I hear, only love and mercy, erasing every fear" - Rez Band)
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To: quantfive
solar cycles of the sun

Isn't that a little bit like "dampness of water?"

31 posted on 01/05/2007 11:05:43 AM PST by presidio9 (Islam is as Islam does.)
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To: grobdriver

http://www.geico.com/video/airport_h.htm


32 posted on 01/05/2007 11:10:00 AM PST by theymakemesick (Under sharia law, bacon will be illegal in Americistan, reason enough to keep islam out of America)
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To: oncebitten
"Does anyone realize how large an SUV would have been required to carry 6 full-grown brontosaurs? I have estimated the size of the engine at 3000 cubic inches with 5000 horsepower - and that does not even count the turbos. Typical milage was .10 per gallon and they did not even have catalytic converters."

This baby could haul them. It has 3,400 horsepower & gets 0.3 mpg. Allowing for a longer unit for comfortable seating, and more power for higher speeds (the Cat can go 40 mph), your estimates are probably pretty close.


33 posted on 01/05/2007 11:21:05 AM PST by USFRIENDINVICTORIA
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To: presidio9
Image and video hosting by TinyPic
'We never should have invented the wheel."
34 posted on 01/05/2007 11:27:15 AM PST by Old Seadog (Inside every old person is a young person saying "WTF happened?".)
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To: presidio9

Here we are now changing the rules in midstream; it will no longer be enough to counter the human influence by pointing to warming periods in the past because it is the speed with which the warming takes place that is at the hand of man, therefore, only man can change it back or stop it.

Perfect ploy, it's still my fault and I didn't do a thing.


35 posted on 01/05/2007 11:41:52 AM PST by Old Professer (The critic writes with rapier pen, dips it twice, and writes again.)
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To: presidio9

"- unpredictable climate changes that took millions of years to unfold naturally could be compressed into a few centuries or less today, several experts said."

And, pig will fly, too. Better get all your Liberal friends to invest in pork belly futures, NOW! Tell 'em to mortgage the house, invest their whelps college funds - get in while there is still time!


36 posted on 01/05/2007 12:21:28 PM PST by GladesGuru (In a society predicated upon Liberty, it is essential to examine principles, - -)
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To: theymakemesick

http://www.youtube.com/watch?v=zJRXKPL76Rg


37 posted on 01/05/2007 12:50:45 PM PST by BenLurkin (O beautiful for patriot dream, that sees beyond the years)
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To: presidio9
These are the same lunatics who get tears in their eyes talking about how the plains were black with buffalo before whitey came along and killed them all for their hides.

Ya know, I like yer thinkin'. I'm in a private mail discussion with a tinfoil hat wearer (who I believe won't go public with his comments because he knows he'll get his head handed to him by FReepers 100 times smarter than he is) who quotes me stuff from James Hansen (apparently his hero) and some report that "proves" that the sun has less influence on GW than previously believed. In his mind, that means that Al Gore and Ed Begley are the enviro-gurus. These people scare me that they cannot think rationally or intelligently.

But, I guess that SOMEBODY has to vote for Democrats!!
38 posted on 01/05/2007 3:55:17 PM PST by DustyMoment (FloriDUH - proud inventors of pregnant/hanging chads and judicide!!)
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To: USFRIENDINVICTORIA
What kind of sound system you got in that baby?

If it's a chintzy little FM only, I'm not buyin'.

39 posted on 01/05/2007 5:37:49 PM PST by Izzy Dunne (Hello, I'm a TAGLINE virus. Please help me spread by copying me into YOUR tag line.)
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To: DustyMoment

Listen: Fully 1/3 of Americans believe that George Bush had something to do with 9/11. I posted a thread on it in September. As a matter of fact moveon.org organized a large protest about said "conspiracy" at the WTC even as family members were reading the names of the dead. I work across the street and the only reason I didn't knock one of them out was out of respect for the ceremony. There out there. I'm well aware of it.

Liberalism is a mental disorder.


40 posted on 01/05/2007 5:48:35 PM PST by presidio9 (Islam is as Islam does.)
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To: Izzy Dunne
Satellite radio might be an optional extra.
41 posted on 01/05/2007 5:56:53 PM PST by USFRIENDINVICTORIA
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To: USFRIENDINVICTORIA
Hey, when I ask about the sound system, I don't wanna hear 'bout no "satellite radio". I'm talking watts, baby, lay some watts numbers on me, or I'm walkin'.

;->

42 posted on 01/05/2007 6:00:14 PM PST by Izzy Dunne (Hello, I'm a TAGLINE virus. Please help me spread by copying me into YOUR tag line.)
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To: presidio9
Liberalism is a mental disorder.

You can say that again, brother!!

43 posted on 01/05/2007 6:22:50 PM PST by DustyMoment (FloriDUH - proud inventors of pregnant/hanging chads and judicide!!)
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To: presidio9
Carbon dioxide levels of 2000 ppm by the end of the century? Where does this guy get his info? The level prior to 1800 was approximately 280 ppm. In 1992 it was at 355. Even if some of the projections are right and we hit 600 ppm "in less than forty years" (source: Prothero: AFTER THE DINOSAURS, page 311) that's still well shy of 2000.

Another problem with this article: 300 Million years ago (Carboniferous/Early Permian) was a time of great diversification and biotic expansion. Oxygen levels, and temperature, were much higher than now. Life flourished. It was only later, when carbon levels dropped, that earth experienced a massive floral extinction. Now, if they are,in fact, talking of the end Permian, they may have a point. Carbon levels then may have reached an all time of 3000 ppm (Ward: OUT OF THIN AIR) but there was also a massive drop in oxygen (to about 12% -- current level is 21% and the Carboniferous high about 31%).

In any event the 2000 ppm figure knocked me right off. Will now go back, read the rest, and see how much science was able to creep through the author's breathless prose.

44 posted on 01/05/2007 8:35:53 PM PST by Reverend Bob (That which does not kill us makes us bitter.)
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To: Terabitten
Or a list of menopause symptoms?
45 posted on 01/05/2007 8:55:44 PM PST by CaptainK (...please make it stop. Shake a can of pennies at it.)
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To: presidio9

Wow, the full-court press by the media on this alarmist topic is amazing! Of course they're playing offense for the Democrats in Congress, as usual. They're trying to get the sheeple into a state of panic so whatever socialist legislation the Donks write will get popular support.


46 posted on 01/05/2007 8:59:07 PM PST by Bernard Marx
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To: Reverend Bob
OK. I've done it -- and learned little in the process. Lots of hyperbole, too few facts.

A few factoids though to amaze the global warming hysteriacs:

1. The average mean temperature in Montana during the Eocene was 27 degrees warmer than now. Oh, and life thrived! The cooler Oligocene age that followed (still much warmer than now) was less diverse than either of the warmer epochs that bracketed it.

2. The Arctic ice cap is a relatively recent development. It did not exist until the mid-Pliocene (about 1.5 MYA).

3. Pleistocene climate cycles, no matter how they're tracked, match most closely to the Croll-Milankovitch cycles (the eccentricity of the earth's orbit, the tilt of it's axis, and the wobble, or "precession", of that axis).

4. Even living in an interglacial as we are, our era, geologically speaking, is far colder than virtually anything that has come before.

And, finally: 5. Warmer temperatures support biotic diversity. Colder temperatures inhibit biotic diversity. Ergo: Global warming is good for diversity. :-)

47 posted on 01/05/2007 9:14:47 PM PST by Reverend Bob (That which does not kill us makes us bitter.)
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To: presidio9; texianyankee; JayB; ElkGroveDan; markman46; palmer; Bahbah; Paradox; FOG724; ...
(((GLOBAL WARMING PING)))



You have been pinged because of your interest in environmentalism, alarmist wackos, mainstream media doomsday hype, and other issues pertaining to global warming.
Freep-mail me to get on or off: Add me / Remove me
Please ping me to all note-worthy threads on global warming.

48 posted on 01/06/2007 10:32:24 AM PST by DaveLoneRanger (Wellllllll! Guess it's not about the economy anymore, is it? Stupid?)
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To: Izzy Dunne

From Berner&Scotese at http://www.geocraft.com/WVFossils/PageMill_Images/image277.gif

Excellent article about climate 300 million years ago Climate and the Carboniferous Period

49 posted on 01/06/2007 11:49:04 AM PST by StopGlobalWhining (Only 3 1/2-5% of atmospheric CO2 is the result of human activities. 95-96.5% is from natural sources)
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To: DaveLoneRanger
The sun was weaker.

Stated in the posted article without additional comment.

50 posted on 01/06/2007 12:09:53 PM PST by StopGlobalWhining (Only 3 1/2-5% of atmospheric CO2 is the result of human activities. 95-96.5% is from natural sources)
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