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Originally posted by apex
No, it's only 23 times worse than CO2, averaged over 100 years. Though in 20 years it has a potential 63 times that of CO2.
Source: University of California - Irvine
Date: November 22, 2006
Level Of Important Greenhouse Gas Has Stopped Growing: Seven-year Stabilization Of Methane May Slow Global Warming
Science Daily — Scientists at UC Irvine have determined that levels of atmospheric methane – an influential greenhouse gas – have stayed nearly flat for the past seven years, which follows a rise that spanned at least two decades.
Major methane emitter identified in Asian rice fields
Catherine Brahic
12 August 2005
Source: SciDev.Net
Researchers have identified a group of soil-dwelling microbes that help make Asian rice-farming one of the world's largest sources of a major greenhouse gas.
Originally posted by Muaddib
Originally posted by apex
No, it's only 23 times worse than CO2, averaged over 100 years. Though in 20 years it has a potential 63 times that of CO2.
Except that first of all methane levels have been stable for the past 8 years.
Originally posted by forestlady
Muaddib, the chart you used for CO2 levels is flat out wrong. It's not from a reputable scientific source, it's from a source that has an agenda to prove. Anyone can put up anything on the internet and call it a science site. Any high school biology teacher will tell you that chart is flat out wrong.
Originally posted by forestlady
You're good at throwing out the big words and cherry-picking pseudo information to look like you know what you're talking about. Either your research is faulty or you're twisting things around.
My husband, a biologist for 25 years, figures you're probably a disinformation agent. Either way, your conclusions and your "information" is really twisted and bears no resemblance to reality.
Robert Berner
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.
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
Originally posted by melatonin
I see Muaddib's doing his dirty work in here...
Robert Berner is one of the foremost researchers in paleoclimate. He's also produced lots of research showing how CO2 is a causal factor in climate, completely at odds with what Muaddib would like to suggest.
Meanwhile, the IPCC mobilized a large number of climatologists and meteorologists and published several impressive, voluminous publications, one after the other. In one of them, “Climate Change 2001,” for example, a figure that became known as “the hockey stick,” was used prominently in the “Summary for Policy Makers,” in which the temperature shows a dramatic increase during the most recent 100 years, after a slow decrease in temperature over the first 900 years. The nickname “hockey stick” was coined because the temperature-time curve had this sudden, upward kink near the end, like a hockey stick. (Since then, this particular figure has been discredited; the new IPCC Report (2007) does not include the figure.)
Originally posted by Muaddib
And again melatonin links to "Real Climate"... The website where Mann and associates...
Originally posted by melatonin
And the website were real scientists, such as Robert Berner, will make posts showing their work does not support your position.
Originally posted by Muaddib
Even if there are 50 million year gaps, on overall the graphs shows CO2 and temperature have not always correlated each other, not to mention the fact that CO2 has always lagged temperature increases, including during the present warming, and the lag has been from 80 years to 800+ years...
and not to mention the fact that even a doubling of CO2 only increases temperatures by a whooping 0.014C.
Originally posted by melatonin
The lag is not so important to CO2's causal relationship, we don't expect CO2 to just magically appear in the atmosphere, but to be emitted due to another cause. When emitted, it does what greenhouse gases do, cause warming.
Originally posted by melatonin
Why are you still spreading this disinformation?
If we were interested in the climate sensitivity of central USA grasslands, then this figure might be relevant.
[edit on 19-5-2007 by melatonin]
Originally posted by Muaddib
The lag is very important, as it shows CO2 during Climate Changes is an effect of changing temperatures, hence mankind "adding a small amount" of the 0.01% of CO2 for the past 150-200 years is not the cause of the current warming cycle.
Why are you trying to dismiss it? Why are you trying to spread more of your disinformation?....