atmosphere mass is 5.0E18 kg
we produce 21.0E12 kg of CO2 per year from burning fossil fuels
that's about 4 PPM per year
"they" think half of it gets absorbed into ocean each year. That's a seperate problem because it makes ocean acidic which changes what life forms can exist.
So CO2 in atmosphere increases by 2 PPM per year which is what we've observed the last 50 years.
You have to be a real "denier" to not acknowledge this - like you're being paid off by the fossil fuel industry so they can continue making profits burning fossil fuels
Hi Jerry,I have no problem acknowledging your figures, apart from the 'half is absorbed by the ocean' claim. I will point out that the ocean is still alkaline though, and will continue to be alkaline even if we carry on burning fuel at the rate we do until it runs out. It might become slightly less alkaline, but since it's alkalinity varies more across a meridional transect than it will by burning all available fossil fuel, I doubt the fish will worry.
The main problem with trying to work out how much of the airborne increase in co2 belongs to us as opposed to how much we put up there is that we don't know how much nature puts up there, or how how much the amount it puts up there has changed, or how much nature absorbs, or how much the amount it absorbs has changed.
As I pointed out to Dan a week ago, scientists built half a dozen different models, all equally valid, half of which found the increase was mostly human caused and half of which found it was mostly naturally caused.
Data and theory from which you can conclude equally valid but opposite results tells us nothing about which of those results is correct.
Since that paper was published in 2005, more evidence has come to light which suggest to us the increase is mostly natural. But we don't know for sure.
Whether or not it is natural, it doesn't have much effect on temperature anyway, unless there's a strong water vapour feedback, which hasn't been observed.