2011-01-03 01:42:46The single simplest point showing that CO2 rise is human caused...
Mark Richardson

We have isotope measurements, carbon cycle modelling, ocean pH measurements and so on.


But isn't the simplest point that human emissions are 30 billion tons/year, whilst the amount in the atmosphere is going up by ~15 billion tons/year?

 Anyone who thinks that the rise isn't caused by CO2 has done something magical with their maths.



This is a suggested simpler answer to all the CO2 rise is caused by the oceans/not by humans points...

2011-01-03 05:35:01

2011-01-03 06:18:25
Rob Painting
Neal, you lost for words?.
2011-01-03 07:29:22yes
Dana Nuccitelli
Yes it's pretty simple logic - the 30 billion tons of CO2 we emit has to go somewhere.  Atmospheric CO2 is increasing by ~15 billion tons per year, so that's the annual imbalance (natural + anthropogenic sources minus sinks).  So if anthropogenic sources emit 30 billion tons per year and the total imbalance is 15 billion tons, then the imbalance without human emissions would be negative 15 billion tons per year, thus we're causing the atmospheric increase.
2011-01-03 18:21:08
Ari Jokimäki


Just recently a paper was published that made a very simple observation that showed that mankind at least has some kind of effect to atmospheric carbon dioxide. Pérez et al. (2010) found that there was a weekly cycle in their carbon dioxide measurements (made in a rural site).


2011-01-03 19:36:23



A very interesting observation.

It also likely separates industrial from land-clearing contributions to CO2.

2011-01-03 19:54:11
Ari Jokimäki

I think there might be a weekly cycle expected also from land clearing. Probably most of the land clearing is done during the office hours.
2011-01-04 03:10:20

But doesn't the release of CO2 come from the decomposition of the wood, etc.? Don't tell me that the bacteria have gotten unionized by now!
2011-01-04 05:51:53
Ari Jokimäki

Well, the release comes from that and from the burning of the wood, but I was thinking that when you cut down a forest, you take a carbon sink away, which should show up in the measurements. But it is a complicated situation with that.