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Originally posted by drogo "eco nazis"
Earth is heating up lately, but so are Mars, Pluto and other worlds in our solar system, leading some scientists to speculate that a change in the sun’s activity is the common thread linking all these baking events.
Others argue that such claims are misleading and create the false impression that rapid global warming, as Earth is experiencing, is a natural phenomenon.
While evidence suggests fluctuations in solar activity can affect climate on Earth, and that it has done so in the past, the majority of climate scientists and astrophysicists agree that the sun is not to blame for the current and historically sudden uptick in global temperatures on Earth, which seems to be mostly a mess created by our own species.
Originally posted by FlyersFan
For those of you who got your 'global warming' education via Al Gore -
www.cei.org...
READ!
He wasn't exactly honest about 'global warming'. (no surprise there).
This has the real facts. Not the Gore agenda.
Originally posted by Athenion
Yea, the CEI has no agenda whatsoever, and is totally fact based.
Originally posted by melatonin
"They call it pollution, we call it life"
I think whoever came up with that should spend an hour in a room with a 15% CO2 atmosphere.
heheh.
I wonder if they will bother to tell this little soundbite to the descendents of the 1700 people who died in Cameroon from CO2 poisoning when it was released from a lake.
[edit on 2-4-2007 by melatonin]
Originally posted by Muaddib
And you can drown from too much water too melatonin...what is your point?...
The amount of CO2 that has been added, manmade and natural together, for the past 150 years amounts to 0.01%...
Originally posted by melatonin
That it was a stupid soundbite by a group of oil-funded hacks?
Originally posted by melatonin
Amounts to 0.01% of what?
Originally posted by Muaddib
You have false statements and claimed that scientists such as Dr. Akasofu have no knowledge of the climate, which I proved you were wrong...
You have claimed that normally CO2 levels during deglaciations only change by about 20 ppm, and I shown that the normal changes are around 100ppm.
it is the amount of CO2 which has increased during the past 150 years melatonin....
The levels of CO2 150 years ago or so was around 0.028%, now they are 0.038%....that's only an increase of 0.01%...
Originally posted by melatonin
errm, no.
I did not say that. I said he is an expert on Aurora. Which he is.
Originally posted by melatonin
errm, no.
I said that 280-300 is the normal CO2 peak for 650,000 years.
During normal ice-age cycle a temperature change of a few degrees is associated with around 280-300ppm.
Science, Vol 283, Issue 5408, 1712-1714 , 12 March 1999
Ice Core Records of Atmospheric CO2 Around the Last Three Glacial Terminations
Hubertus Fischer, Martin Wahlen, Jesse Smith, Derek Mastroianni, Bruce Deck
Air trapped in bubbles in polar ice cores constitutes an archive for the reconstruction of the global carbon cycle and the relation between greenhouse gases and climate in the past. High-resolution records from Antarctic ice cores show that carbon dioxide concentrations increased by 80 to 100 parts per million by volume 600 ± 400 years after the warming of the last three deglaciations.
Originally posted by melatonin
Yeah, an increase of 100ppm, which is equivalent to an increase of only 30% in CO2 levels, but a massive 0.01% of total atmosphere...
Originally posted by Muaddib
Massive?... The Earth has had 4,000 and even over 7,000 ppm, which make it to 0.4 to 0.7% levels of CO2 of the total atmospheric gases, and there was no "Runaway Global Warming", Earth did not become Mars, and during times when Earth had 4,000-4,400ppm of CO2 the temperature of Earth was similar to the present and there was life on Earth...
Originally posted by Essan
Actually, when we had 4,000ppm CO2 there were no polar ice caps and the Earth was considerably warmer than today And no-one who knows what they're talking about is suggesting run away greenhouse or anything.
The Late Ordovican was an Ice House World. The South Polar Ice Cap covered much of Africa and South America. The climate in North America, Europe, Siberia and the eastern part of Gondwana was warm and sunny
Originally posted by Essan
However, under current orbital parameters and continent and orogenic (mountain range) configuration, a comparatively small increase in CO2 could cause a noticeable increase in temp. And if maintained long enough might even prevent or at least delay the next ice age.
Originally posted by Essan
If you ignore the more extremist, catastrophic, predictions made by the less well informed, and stick to the facts, there is a middle ground which says there'll be some gradual changes in climates in some parts of the world but in most cases we can readily adjust and in some cases they'll be beneficial, especially in the long term.
Originally posted by Muaddib
Actually it was as warm as it is today. The only reason why the climate in Siberia, North America, Europe and the eastern part of Gondwana was warm and sunny is because the Earth was much different back then, all those areas were close to the ecuator. There were ice caps, but meanwhile in the north there were no landmasses, in the south South America and much of Africa were covered by the south pole ice caps.
In fact CO2 levels have increased in the Earth's past during Ice Ages, such as what happened in the late Ordovician.
Originally posted by Muaddib
You tried to discredit him even though his PHd is in Geophysics and if we only look at the past 9 years of his career, during that time alone he was the Director of the International Arctic Research Center, where they have been studying Climate Change in the Arctic....
No...this is the part that you stated and which is wrong...
During normal ice-age cycle a temperature change of a few degrees is associated with around 280-300ppm.
www.abovetopsecret.com...
That is not true in the least..
Massive?... The Earth has had 4,000 and even over 7,000 ppm, which make it to 0.4 to 0.7% levels of CO2 of the total atmospheric gases, and there was no "Runaway Global Warming", Earth did not become Mars, and during times when Earth had 4,000-4,400ppm of CO2 the temperature of Earth was similar to the present and there was life on Earth...
Ray doesn't mention my modeling work also misrepresented by William Broad. I have been looking over the past 20 years at factors affecting the carbon cycle during the Phanerozoic. This is summarized in my book The Phanerozoic Carbon Cycle (Oxford University Press, 2004) There are very many factors affecting CO2 that are not obvious on a human or even Pleistocene time scale. This includes the feedback of global warming on CO2 uptake by increased silicate rock weathering and CO2-induced increased plant productivity as it also affects CO2 uptake by weathering. The rise of vascular land plants during the Paleozoic undoubtedly had a large effect on CO2 uptake via both increased weathering and the accumulation of carbonaceous debris in rocks. Continental drift affects both continental temperatures and river runoff and crude estimates of such factors has been made via GCM modeling The whole long term carbon cycle and its effect on CO2 should not be ignored and replaced by simplistic assumptions for quick calculations of paleo-CO2. Nevertheless, ten million year averages for the many (over 400) independent proxies fall within my estimated error margins, obtained via sensitivity analysis, which are VERY WIDE. A copy of this data is being sent to Ray personally. I couldn't reproduce it here. Also,the two major extended periods of glaciation (Permo-Carboniferous) and the past 30 million years agree both with modeling and proxy averages. This is crude by modern modelling standards but it is strongly suggestive of a correlation of CO2 with climate. If you don't like any of this, at least look at my book.
Robert Berner
The late Ordovician (~440 Ma) represents the only interval during which glacial conditions apparently coexisted with a CO2-rich atmosphere. Critically, though, widespread ice sheets likely lasted