human activities now emit 150 times as much CO2 as volcanoes? Is this right?

[Toronado3800]

Carbon dioxide emissions: Volcanoes also emit carbon dioxide (CO2), a greenhouse gas, which has a warming effect. For about two-thirds of the last 400 million years, geologic evidence suggests CO2 levels and temperatures were considerably higher than present. One theory is that volcanic eruptions from rapid sea floor spreading elevated CO2 concentrations, enhancing the greenhouse effect and raising temperatures. However, the evidence for this theory is not conclusive and there are alternative explanations for historic CO2 levels (NRC, 2005). While volcanoes may have raised pre-historic CO2 levels and temperatures, according to the USGS Volcano Hazards Program, human activities now emit 150 times as much CO2 as volcanoes (whose emissions are relatively modest compared to some earlier times).

Past Climate Change | Science | Climate Change | U.S. EPA

I was just doing some light reading. 150 times? Seems a bit high. Is it real?

 

[Oddball]

Where'd the EPA get their figures, from CRU?

Better put on your heavy jacket, because there's a huge cynicism blizzard a-settin' in.

 

[Toronado3800]

References

* IPCC, 2007: Climate Change 2007: The Physical Science Basis. Exit EPA DisclaimerContribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning (eds.)].
* National Research Council (NRC), 2002: Abrupt Climate Change, Inevitable Surprises. Exit EPA Disclaimer National Academy Press, Washington, DC. National Academy Press, Washington, DC
* National Research Council (NRC), 2005: Radiative Forcing of Climate Change. Exit EPA Disclaimer National Academy Press, Washington, DC. National Academy Press, Washington, DC
* National Research Council (NRC), 2006. Surface Temperature Reconstructions For the Last 2,000 Years. Exit EPA Disclaimer National Academy Press, Washington, DC.

Some combination of these and a geologic survey they linked to.

Do they use CRU as a source for their geologic data? I can keep clicking links but the one darn site wanted $58 from me for more details.

Worse than porn on line I tell ya

 

[Oddball]

IPCC gleaned heavily from CRU, and a lot of the subsequent models have been built on CRU data.

I'm tellin' ya...The scientific community has a bad case of the clap going around.

 

[Si modo]

I can smell the desperation.

This is like a giant sucking chest wound to the alarmists, though.

 

[Missourian]

Man-made GHG only account for 5.5% of total greenhouse gas emissions, the other 94.5% is naturally occuring.

And that calculation excludes water vapor as a GHG.

Just how much of the "Greenhouse Effect" is caused by human activity?
It is about 0.28%, if water vapor is taken into account-- about 5.53%, if not.

Global Warming: A closer look at the numbers
​

​

Wikipedia has this

Natural sources of carbon dioxide are more than 20 times greater than sources due to human activity.

Greenhouse gas - Wikipedia, the free encyclopedia
​

They cite this UN Intergovernmental Panel on Climate Change page as a reference.

Vital Climate Graphics | UNEP/GRID-Arendal - Publications - Vital Climate Graphics
​

That corresponds with the 5.5% above...20 times greater equals 20 to 1 equals 100 to 5 equals 5%.



So if mankind gave up all fossil fuels, industry and livestock, built mud huts and returned to hunting and gathering, 94.5% of greenhouse gas emissions would remain because they are naturally occurring.


Is this true?

Yes, it is true, but the problem is that CO2 stays in the atmosphere a long time, and if you add 8 billion tons of CO2 to the atmosphere every year, year after year, and you cut down trees at the same time, you are going to increase atmospheric CO2 by 40% in 200 years.

Yes, each year we add a small percentage compared to what nature adds. Yet nature also takes out a very large amount of what is added. It removes, throught plant life, absorbtion in the ocean, more than it adds. But not enough more to make up for what we add. And that is how we end up with a 40% increase of CO2 over what that level was 150 years ago. Not only that, that represents a 30% increase over what it has been in at least 650,000 years, possibly in over a million years.

If you read the article on the Carbon 13 and 14 ratios, you will see how we can tell that the additional CO2 is from the burning of fossil fuels.

http://www.usmessageboard.com/envir...ecedes-10-miles-in-8-years-4.html#post1341995

 

[Toronado3800]

We'll see what other numbers come up. I have drained the battery from the lap top and need to sleep before knee therapy in the morning anyway. Catch ya tomorrow

 

[Chris]

We are pumping billions of tons of CO2 into the atmosphere every year.

We have almost doubled the amount of atmospheric CO2 in the last 200 years.

CO2 is now at its highest level in 600,000 years.

The Sun is at its lowest level of activity in 80 years, yet the ice continues to melt.

These are the facts.

 

[Oddball]

The ice isn't melting anymore and you know it.

That is a fact.

 

[Chris]

The ice isn't melting anymore and you know it.

That is a fact.

Sorry, the ice is still melting.

Last month the arctic ice was below the 2007 low according to the NSIDC.

The real question is, "Since the Sun is at its lowest level of activity in 80 years, why isn't it colder?"

And why are the oceans registering their highest temperature ever?

 

[Oddball]

Yes, you're sorry alright.

 

[JWBooth]

Its been a slow year for volcanoes, big deal.

 

[Sinatra]

The ice isn't melting anymore and you know it.

That is a fact.

Sorry, the ice is still melting.

Last month the arctic ice was below the 2007 low according to the NSIDC.

The real question is, "Since the Sun is at its lowest level of activity in 80 years, why isn't it colder?"

And why are the oceans registering their highest temperature ever?

What ice is that?

Selective data is what you flat-earth warmers are all about...


___

Revealed: Antarctic ice growing, not shrinking

ICE is expanding in much of Antarctica, contrary to the widespread public belief that global warming is melting the continental ice cap.

The results of ice-core drilling and sea ice monitoring indicate there is no large-scale melting of ice over most of Antarctica, although experts are concerned at ice losses on the continent's western coast.

Antarctica has 90 per cent of the Earth's ice and 80 per cent of its fresh water. Extensive melting of Antarctic ice sheets would be required to raise sea levels substantially, and ice is melting in parts of west Antarctica. The destabilisation of the Wilkins ice shelf generated international headlines this month.

However, the picture is very different in east Antarctica, which includes the territory claimed by Australia.

East Antarctica is four times the size of west Antarctica and parts of it are cooling.


Full article here:


Revealed: Antarctic ice growing, not shrinking | The Australian

 

[Toronado3800]

Ok. So overall mankind ads 5% or so to all forms of natural CO2 emissions a year.

Overly simplified over a 20 year period that makes a 100% increase or doubling of CO2 levels. That roughly agrees with the chart which seems to indicate pre-industrialized CO2 levels were 200 parts per million or so and now its 380 ppm.

Thanks for the clarifications. It was late last night and I was confusing the difference between volcanoes and all sources of natural CO2.

 

[Chris]

Ok. So overall mankind ads 5% or so to all forms of natural CO2 emissions a year.

Overly simplified over a 20 year period that makes a 100% increase or doubling of CO2 levels. That roughly agrees with the chart which seems to indicate pre-industrialized CO2 levels were 200 parts per million or so and now its 380 ppm.

Thanks for the clarifications. It was late last night and I was confusing the difference between volcanoes and all sources of natural CO2.

That's it exactly.

We are tipping the natural balance by doubling CO2.

Whether this will cause a release of the arctic methane or save us from a new ice age remains to be seen.