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originally posted by: jrod
a reply to: nenothtu
I get the 40% figure directly from NOAA.
www.esrl.noaa.gov...
originally posted by: raymundoko
a reply to: jrod
The papers are in this thread. Proof you haven't even looked at the science behind the 40% numbers. Nobody argued the 40% wasn't the increase. I think it would behoove you to re-read this thread so you stop looking foolish.
originally posted by: nenothtu
When does the "pre-industrial" figure you cite come from? What year? An approximate year will do -and what percentage of the 4.5 billion years or so of Earth's existence does that tiny span account for?
originally posted by: jrod
a reply to: nenothtu
Did you take the time look at the video I added to the thread?
Video of CO2 from fossil fuel combustion
This is disinfo 101 in my opinion.
You completely ignore the evidence presented by the experts(by calling in to question NOAA's estimation of 280ppm being pre-industry CO2 level. Then you go on to imply to make ancient history of the earth's atmosphere as somehow relevant to the apparent CO2 rise as a direct result of human burning fossil fuels.
originally posted by: jrod
a reply to: jrod
Wow, missed a bunch of typos as usual.
Let me re-iterate the point I was trying to get across:
You do NOT think the 280 ppm is a accurate starting point because it is endorsed by NOAA scientists. They are NOT credible because they are government scientists?
Then you assume I am an ignorant of the history of atmosphere changes and try to 'educate me' in a way that makes it appear I am ignorant on the subject at hand. Ancient times did not have a species that release so much CO2 in the atmosphere in such a short time. The timescale it took the plant kingdom to transform the planet into an O2 rich world was millions of years. We are making these big changes to this planet's chemistry in just a few centuries.
originally posted by: mbkennel
originally posted by: nenothtu
When does the "pre-industrial" figure you cite come from? What year? An approximate year will do -and what percentage of the 4.5 billion years or so of Earth's existence does that tiny span account for?
Pre-industrial CO2 in this field means the level which existed from the end of the previous Ice Age, to about 1750.
It's a small percentage of Earth's geological history and the entirety of human civilization.
Appealing to "dinosaurs and plants were around when CO2 was higher" is completely and dangerously irrelevant to appropriate behavior by humans NOW, at least as irrelevant as a shark's diet is to human health recommendations.
originally posted by: raymundoko
a reply to: nenothtu
Why do you think they started at an arbitrary point? They started at a point that is supported by the scientific process. Even high end estimates for the start at 330 PPM pre industrial levels still show that we have increased a good amount since the early 1800's.
Arbitrary indicates they randomly picked a number. The number had pretty solid evidence to support it.
There are reasons for all of these verbal manipulations intended to promote the notion of "industrial" (i.e "bad") and "pre-industrial" (i.e. "good"), and limiting the "good" and "pre-industrial" to a time frame that is politically expedient.
originally posted by: raymundoko
a reply to: nenothtu
Why do you think they started at an arbitrary point? They started at a point that is supported by the scientific process. Even high end estimates for the start at 330 PPM pre industrial levels still show that we have increased a good amount since the early 1800's.
Arbitrary indicates they randomly picked a number. The number had pretty solid evidence to support it.
1. Introduction
[2] Of the current 10 billion tons of carbon (GtC) emitted
annually as CO2 into the atmosphere by human activities
[Boden et al., 2009; Houghton, 2008], only around 40%
[Jones and Cox, 2005] remain in the atmosphere, while the
rest is absorbed by the oceans and the land biota to about
equal proportions [Bopp et al., 2002]. This airborne fraction
of anthropogenic CO2 (AF) is known to have stayed
remarkably constant over the past five decades [Jones and
Cox, 2005], but if it were to increase in a way predicted by
models, this could add another 500 ppm of CO2 to the
atmosphere by 2100 [Friedlingstein et al., 2006], significantly
more than the current total. While recent studies have
highlighted a decreasing ability of the Earth system to
absorb the excess CO2 [Le Que´re´ et al., 2007; Schuster
and Watson, 2007; Canadell et al., 2007], the question if
and why the airborne fraction has stayed constant at the
decadal time scale has received less attention.
The analysis further shows that the statistical
model of a constant airborne fraction agrees best with the
available data if emissions from land use change are scaled
down to 82% or less of their original estimates. Despite the
predictions of coupled climate-carbon cycle models, no trend
in the airborne fraction can be found
. If process models are
used, however, they need to be carefully constructed in
order to answer the question of why the AF has remained
constant and not shown more pronounced decadal-scale
fluctuations or a stronger secular trend.
originally posted by: jrod
a reply to: nenothtu
Again, you dismiss good evidence that shows humans contribution to CO2 and then go to what appears to me, an ad hominem attack on the data and visual representation of the increase of CO2.
Please kindly pull your head out of your arse and present this thread with evidence, NOT your scientifically illiterate opinion/rant
I say you bring disinfo to the discussion and you do it again, even after freaking out over my use of the work disinfo:
..."There are reasons for all of these verbal manipulations intended to promote the notion of "industrial" (i.e "bad") and "pre-industrial" (i.e. "good"), and limiting the "good" and "pre-industrial" to a time frame that is politically expedient." ...
That right there is YOUR attempt at disinformation.
So when in Earth's history has a species contributed this much CO2 to the Earth's atmosphere in such a short amount of time?
Right now if this trend continues, we will have doubled the per-industrial CO2 levels in less than a century from today. You really have to pull the wool over your eyes to not see this is a significant problem.
originally posted by: raymundoko
a reply to: nenothtu
I mean solid evidence that co2 was somewhere between 280 and 330 PPM before the industrial revolution.
I have said it before and I will say it again, though I probably won't live to see it, I can't wait for co2 to be back to a healthy place (600-1200PPM) for the earth.
I authored another thread that reviewed testimony from leading climate scientists, all of whom either currently contribute or have contributed to the IPCC, stating that humans can become carbon neutral/negative with reforestation alone and conservationist policies without having to sacrifice our standard of living. Imagine what humans could accomplish if we were carbon neutral with our CURRENT technology once we advance past it. We'll be like high-tech Native Americans, one with our planet and all that.
The issue I have with our current technology isn't even the co2, it's all the other toxins we put into our biosphere.