A variety of stories have come in recently (or at least fairly recently – I’m a bit behind the times, and it was a heavy weekend, wot with E getting chickenpox and the central heating failing) about CO2 levels, e.g. Sharp rise in CO2 levels recorded from the BBC. This turns out to source at a NOAA release, which has a nice pic but I can’t find the data for 2005, only up to 2004. Also note that is “global” avg; just Mauna Loa is here.
Anyway, the point I was going to make was that this could have been better titled; CO2 levels are now at a record (though not at Mauna Loa, because of the annual cycle…) but are pretty much on the long-term trend line; by eye, about 2-and-a-bit ppmv over the last 4 years.
BTW, did you know that 23rd March is World Met Day?