"Fred J. McCall" wrote in message
...
"Alastair McDonald" k
wrote:
:Much worse. That is why the measurements were done on top of a
:mountain, in the middle of the ocean, near the equator, well away
:from the distorting effects of man and vegetation.

But right smack in the middle of an active volcano which belches CO2?

Yes, it's true, Mauna Loa is an active volcano, in fact it's the biggest
volcano on earth! So, Charles Keeling didn't know that? Well, yes, he did.
And using subtle scientific indicators like "wind direction" he was even
able to ensure that his readings were not contaminated by any outgassing
when it was occuring.
But, ok, let's throw out Mauna Loa. There are dozens of other sampling
stations scattered all over the globe, including one in the Antarctic
(http://cdiac.esd.ornl.gov/trends/co2/sio-spl.htm), far from cities, SUV's,
cement plants and active volcanoes. It also shows the same rise though the
southern hemisphere tends to lag a few years behind the northern hemisphere
where the majority of the CO2 is produced. Here are eight others, same
results. (http://cdiac.esd.ornl.gov/trends/co2/sio-keel.htm)

Sorry, its all of us Joes, not the volcanos.


--
Coby Beck
(remove #\Space "coby 101 @ bigpond . com")