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Hi mc_squared,
Practically all of the "big five" oil multinationals accept the science as settled and support large scale climate policy action including a carbon tax.
In the past decade, the leading recipient of ExxonMobil PAC contributions has been Representative Joe Barton, a Republican from Texas, who has held senior positions on the House Energy and Commerce Committee, where most legislation affecting the oil industry originates.
The argument, that skepticism in climate science mainly exists because of a secretly funded denial industry, falls apart here. It was never valid in the first place.
Though I also ask you. Why is global warming more important than all the pollution we are dumping into our fresh waters? More important than all the deforestation? The destruction of entire ecosystems just to make a quick buck? If you ask me, man made global warming (regardless of its veracity) is just the tip of the iceberg. We can't fix one problem without addressing all of them.
originally posted by: Greven
originally posted by: Dfairlite
Ok, so the signature for "man made CO2" in the atmosphere is usually measured by C13/C12 isotope comparisons, correct? Since man made CO2 is (usually) less rich in the C13 isotope than natural CO2, we look for a variability in the concentrations of each isotope. And of course, there has been some variability. But the problem lies with the the fact that the natural (not man made CO2) variability of CO2 lines up exactly with the variability we have seen. So if naturally this relationship varies at the exact same rate as the variability we have seen, then how can anyone claim that it is man made CO2 that has caused the increase in CO2 concentration?
It's a fact that we are emitting more than 29 gigatonnes of CO2 into the atmosphere annually. The Earth's atmosphere is estimated to weigh in at 5,148,000 gigatonnes. In April, the CO2 concentration of the atmosphere was 400 ppm, and since CO2 weighs a bit more than other atmospheric components, it has to be adjusted by multiplying the volume by the mass, or 1.5191, giving a total mass of 3,128 gigatonnes of CO2. Approximately 7 years ago, the atmospheric concentration of CO2 was 383ppm, for a mass value of 2,996 gigatonnes of CO2. That's an additionally 18.86 gigatonnes annually. It doesn't just mysteriously disintegrate, so what's happening to it?
As to the 'percent that is man' versus 'percent that is nature' well... let's say you have two glasses of water. One has food dye in it, representing man's contribution of CO2. Another is uncolored and filled to the brim, representing nature's CO2. Also, this second glass is far larger. If you ever so slowly pour the first glass into the second, does the clear or the dyed water flow out over the rim?
originally posted by: jrod
originally posted by: jrod
We will likely double the CO2 count in less than 100 years from today.
By double I meant using 280ppm as a starting point. I do not think it is unreasonable to say that will will likely have CO2 around 560ppm in 100 years unless something drastic happens with humanity and the world.
I will go ahead and call this my prediction.
originally posted by: Dfairlite
It is cycled out of the atmosphere (both the natural and man made). Your analogy uses a glass without a hole in the bottom which would represent the fact that the atmosphere cycles out CO2 every century (really every day, but just for the sake of argument I'm going with century). Some centuries there is a net surplus, some centuries there is a net loss of CO2.
originally posted by: Greven
originally posted by: Dfairlite
It is cycled out of the atmosphere (both the natural and man made). Your analogy uses a glass without a hole in the bottom which would represent the fact that the atmosphere cycles out CO2 every century (really every day, but just for the sake of argument I'm going with century). Some centuries there is a net surplus, some centuries there is a net loss of CO2.
Yet, last I saw, only about 4% of atmospheric CO2 can be traced to human activity - even though we've added that much in only seven years.
Our CO2 is getting cycled out while nature's CO2 is rapidly accumulating, because the sinks ain't big enough for both.
Prior to the 1980s measurements of sea surface temperature were derived from instruments on shorelines, ships and buoys. The first automated method of gathering sst was by measuring water flowing through the input ports of ocean faring ships. While this method obtained a significant quantity of useful SST data there were some shortcomings. The depth of the input ports of different ships can vary greatly from ship to ship. In a stratified ocean these different depths can have different temperatures. This method also resulted in rigorous sampling along major shipping routes but a dearth of information about the vast majority of the world's oceans.
The UN's Intergovernmental Panel on Climate Change (IPCC) addressed the warming pause issue in its 2013 climate report, pointing out that the Earth is going through a solar minimum and that more than 90% of the world's extra heat is being soaked up by the oceans, rather than lingering on the surface.