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RE: Global Warming: Some good news - 7/10/2006 4:10:52 PM   
Lordandmaster


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They were not quotes; they were references.  And the only reason why I cited some recent articles in Science Magazine is that someone else on here claimed, without a reference, that Science Magazine has asserted that global warming is attributable to changes in solar energy (or some such nonsense).  Did you read that?  Evidently not.

Many articles in Science are by real scientists; about as many are by science journalists.  It certainly wouldn't be my journal of choice, but I wouldn't sneer at it the way you seem to.

And I thought I told you to address me as Dr. Lordandmaster, not *Lordandmaster*.  I mean, those little stars are cute, but * is not a title.

quote:

ORIGINAL: RolePlayInTheOC

*Lordandmaster* - YOUR quotes are both from Science Magazine (why am I not surprised?).


< Message edited by Lordandmaster -- 7/10/2006 4:12:38 PM >

(in reply to RolePlayInTheOC)
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RE: Global Warming: Some good news - 7/10/2006 4:39:30 PM   
asyouwish72


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quote:

the termites in Africa put out more "global warming" gases than humans.


Umm, say again, pal? I hope that was a bit of hyperbole for dramatic effect, cuz that little bit right there pretty much puts you in the land of "raving lunatics". The simple, undeniable, absolutely rock-bottom fact is that since the start of the industrial revolution, we've seen an increase in atmospheric CO2 concentrations of the same size as the shift from the last glacial maximum into the early holocene. It's taken all of about 150 years, and there have been no geological, oceanographic, or atmospheric changes that could begin to account for it. It's fossil fuels, plain and simple (with some contributions from land-use change as well). It's also worth noting that there wasn't any large atmospheric CO2 excursion in either the medieval warm period or the little ice age, and they may well have been fairly local in nature- the M.W. in particular- and most likely related to the circulation of the north Atlantic (which acted to magnify underlying solar forcing). Predictions about the impacts of global warming are just that- predictions- and should be treated with a certain degree of skepticism, but there is overwhelming evidence EVERYWHERE (the rise in atmospheric CO2, the decline of oceanic pH, the total unbalancing of the global cycle of nitrogen fixation) that humanity can, and does, have substantial, global-scale impacts. We need to grow up and start structuring our behavior accordingly. But don't take my word for it- look at the original data, available HERE:

http://www.cmdl.noaa.gov/ccgg/trends/

Otherwise, enjoy life in Never Never Land.

(in reply to Mercnbeth)
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RE: Global Warming: Some good news - 7/10/2006 4:49:54 PM   
Mercnbeth


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Source: http://sparce.evac.ou.edu/q_and_a/global_warming.htm
 
Gases Involved in the Greenhouse Effect:
Past and Present Concentration and Sources


Greenhouse Gas

Concentration 1750
Present Concentration
Percent Change
Natural and Anthropogenic Sources


Carbon Dioxide
280 ppm
360 ppm
29 %
Organic decay; Forest fires; Volcanoes; Burning fossil fuels; Deforestation; Land-use change

Methane
0.70 ppm
1.70 ppm
143 %
Wetlands; Organic decay; Termites; Natural gas & oil extraction; Biomass burning; Rice cultivation; Cattle; Refuse landfills

Nitrous Oxide
280 ppb
310 ppb
11 %
Forests; Grasslands; Oceans; Soils; Soil cultivation; Fertilizers; Biomass burning; Burning of fossil fuels

Chlorofluorocarbons (CFCs)
54
900 ppt
Not Applicable
Refrigerators; Aerosol spray propellants; Cleaning solvents

Ozone
Unknown
Varies with latitude and altitude in the atmosphere
Global levels have generally decreased in the stratosphere and increased near the Earth's surface
Created naturally by the action of sunlight on molecular oxygen and artificially through photochemical smog production

< Message edited by Mercnbeth -- 7/10/2006 5:02:48 PM >

(in reply to asyouwish72)
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RE: Global Warming: Some good news - 7/10/2006 5:26:54 PM   
popeye1250


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The article in "SCIENCE" magazine about increased solar activity was written about 7 years ago I believe.
Also they mentioned that there were studies done on ice in the Antartic that was ten thousand years old and that there was a warming during that period as well.
I don't think there were many Buicks around 10,000 years ago.
And why would anyone in their right mind want the "UN" involved in this?
Have any of you even read that "KYOTO" treaty?
"Hey, I'll give you three "energy credits" if I can burn 20,000 tires!"
It's nothing but a scam! Just another way of syphoning money from Western countries by the "UN".

(in reply to Mercnbeth)
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RE: Global Warming: Some good news - 7/10/2006 5:28:06 PM   
asyouwish72


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And how does this relate to termites? From your very own link:

"Concentrations of carbon dioxide in the atmosphere are now approaching 360 parts per million (see Figure). Prior to 1700, levels of carbon dioxide were about 280 parts per million. This increase in carbon dioxide in the atmosphere is primarily due to the activities of humans. Beginning in 1700, societal changes brought about by the industrial revolution increased the amount of carbon dioxide entering the atmosphere. The major sources of this gas include: fossil fuel combustion for industry, transportation, space heating, electricity generation and cooking; and vegetation changes in natural prairie, woodland and forested ecosystems. Emissions from fossil fuel combustion account for about 65 % of the extra carbon dioxide now found in our atmosphere. The remaining 35 % comes from the conversion of prairie, woodland and forested ecosystems primarily into agricultural systems. Natural ecosystems can hold 20 to 100 times more carbon dioxide per unit area than agricultural systems."

The last bit, incidently, is uncited, and seems rather dubious, especially if timber farming is considered agriculture. Also, this information must be quite dated- we left 360 ppm in the dust years ago- we're at 385 now, and 400 is coming on fast.

(in reply to Mercnbeth)
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RE: Global Warming: Some good news - 7/10/2006 7:30:38 PM   
NeedToUseYou


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Just quick replies not directed toward previous poster...

Is this even a debate. That more greenhouse gases are in the air today, than other "STABLE" periods of times in the past. Obviously if a large volcano blows it will release tons of gases and create its own "Natural" effect on the environment. But since we are in a fairly stable time period this isn't the cause. Sure a natural forest fire happens or a small volcano, or whatever natural event that occurs and releases green house gases. But that's always happened at the current rate or greater. So, why are the green house gases elevated then?
Hmmmmm, well, carbon is stored in trees, and living things, these things die, and under the right conditions turn to coal, and oil(of course most just rots and is absorded into other carbon  life on the surface). Where it sits for millions of years... So, large pockets of carbon were isolated from the system. It was buried and didn't interact with the surface environment or air. Now, here we come, we dig it up and burn it. It's undeniable that there would be more carbon based gases in the air. Since we are introducing more carbon into the system(surface as opposed to buried). On top of it we are cutting down the most dense regions where carbon is absorbed, the rain forest. So, we release the buried carbon, and cut down the densest living carbon regions. And somehow more carbon doesn't end up in the atmosphere mixed with oxygen?

You don't need a scientific journal to rationalize the logic there.

So, I'm guessing everyone agrees that carbon dioxide levels are going to rise?
Yes, No. If not why wouldn't they rise if we are digging it up and burning it at the same time we are cutting the live dense carbon down and burning it(or building houses, which don't absorb CO2, and don't grow).

Well, then if you are adding carbon to a system and thus increasing carbon dioxide, the only logical next step is to ask what does carbon dioxide do? Well, I don't think anyone is debating the  function of CO2, so we agree it will cause a decrease in the rate heat is released from the atmosphere? right.
If you don't believe this explain where it is stated that CO2, doesn't inhibit the release of heat from the atmosphere.

So, if that is agreed then the only question is how much CO2(and other gases, whatever), does it take to cause a appreciable increase in temperature. And what other factors could be possibly suppressing this effect. Those are really the only two questions of importance. Not that the CO2 levels are rising, and that CO2 tends to raise temperatures. That's a given.

Now, it's speculation after that to some degree... but this is what I believe..

They have ice cores that show the historic levels of CO2 in the atmosphere, and temperatures. Every spike in CO2 levels has been accompanied by a spike in temperature barring the release, simultaneously of large amounts of particle pollution, which have the effect of blocking the sun and reducing the temps. So, if you had let's say a huge volcano blow, well it will release vast amounts of greenhouse gases but it will also release vast amounts of particle pollution which will blot out the sun to one degree or another cancelling the effect for awhile, then once the particles settles out of the atmosphere, the increased CO2 effect becomes pronounced.

So, currently we are pouring particle pollution in the air, along with CO2. So, basic logic would imply any raise in temperature we are seeing is in fact being offset to some degree by the particle pollution.

Anywho, the ultimate logic is that as we clean up particle pollution, the effects of the CO2 would be become fully realized. This explains why the global temps are to some degree out of whack and lower than they should be compared to other measured periods in time where CO2 levels were high. The temp is going up, but not as much as it would if the air was clean. Less particle pollution in the past. The documentary global dimming is a good one to watch about particle pollution.

But it's fairly simple if the air is dirty, less light gets to the surface. Along with it's effects on cloud formation, reduce global temps. Or offset the increases caused by CO2, and other greenhouse gases.





(in reply to asyouwish72)
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RE: Global Warming: Some good news - 7/10/2006 10:38:49 PM   
Lordandmaster


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Well, even if that's true--and I didn't find anything like what you're talking about in the Science magazine archives--the best research about global warming has come within the last five years or so.  People didn't know nearly as much about global warming in 1999 as we do today.

quote:

ORIGINAL: popeye1250

The article in "SCIENCE" magazine about increased solar activity was written about 7 years ago I believe.

(in reply to popeye1250)
Profile   Post #: 67
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