It's been a pretty shitty winter here in CO, too. I'm used to snow melting/subliming within a few days; I've got a 5' pile of snow next to my driveway that's been there for a month and I suspect will be there until April.



I wouldn't say this disproves any kind of global warming theory, though.

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I only know what I have read about the minimal amount of human vs natural co2 production from Nasa. You can work the math however and ask NASA for a further clarification. I have no reason to doubt their claims of 3.5% - 5% of all co2 are human caused.

If we stop volcanic eruptions, we would stop most of the co2 being discharged naturally. Just cap the volcanos and end global warming tomorrow.

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The reason co2 is only accumulating at 15 billion tons per year in the atmospehre, despite over 500 billion tons being emitted globally, is that there are processes removing co2 from the atmosphere.

Given that nature adds co2 to the atmosphere and takes it away too, what is the net effect of nature? The net effect is that nature removes more co2 from the atmosphere than it adds.

Without human co2 emissions the co2 levels in the atmosphere would start falling.

Then wouldn't we have reached zero billions of years ago?

Nature's rate of co2 absorption has increased as co2 levels have increased. 300 years ago nature was emitting as much as it absorbed.

As human activity started emitting more co2, nature started absorbing more in response. Although currently it's only absorbing about half our emissions each year - which is why co2 levels are rising at about half the rate of human emissions.

Volcanic erruptions emit only around 150 million tonnes of CO2 annually. In comparison the US emits some 5.7 billion tonnes. That's much more.

And volcanic activity is associated with cooling, not warming. That's because volcanoes spew sulphates and aerosols into the atmosphere cooling the planet.

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Ahhh, I see. So, 300 years ago there was as much CO2 as there was at the birth of the planet?

No, but for at least 1000 years prior to 300 years ago co2 trends were pretty flat at around 280ppm throughout.

http://www.ecoinfo.org/env_ind/regio...lobalco2_e.gif

So for that time period the earth was absorbing as much co2 as it was emitting. Only with the addition of human co2 emissions did emissions start outweighing absorption, and co2 levels in the atmosphere started to rise, following the exponential curve of co2 emissions.

So, CO2 concentrations naturally stay constant?

No, they can change

Naturally? Oh, so these statements...

aren't necessarily true?

Cato, you are still not getting it. The eath has a thermostat and the entire human population has it's hand on it turning it up higher and hotter everyday. Don't you see it?



There must be some way to make you believe that humans are turning the heat on and off like a switch. Please start ignoring the hotter burning sun. That was caused by Bush when he made Katrina into a storm to detroy the gulf for Cheney's oil futures.

The Sun isn't really burning hotter, it just 'seems' that way.

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They are true for the current situation, which was their context. Currently nature is removing more co2 from the atmosphere than it adds. And without human emissions co2 levels would start falling.

What is "current"? And how do you know that "without human emissions CO2 levels would start falling?"

The last decade is the best example - co2 levels are rising at only about half of human emission rate. Without human emissions co2 levels couldn't be rising.

Because nature is absorbing more co2 from the atmosphere than it is emitting into it. Therefore left alone co2 levels in the atmosphere would start falling. They only rise because human co2 emissions (~28 billion tons per year) are double the net rate of natural absorption (~15 billion tons per year)

The reason nature is absorbing more co2 than it is emitting is because there is an abundance of co2 in the atmosphere at this time.