Atmospheric CO2 concentrations broke through the 400ppm threshold for the first time in 800,000 years in May at 7 monitoring stations around the Arctic circle, according to an announcement from NOAA.“The northern sites in our monitoring network tell us what is coming soon to the globe as a whole. We will likely see global average CO2 concentrations reach 400 ppm about 2016."
Pieter Tans, an atmospheric scientist with NOAA’s Earth System Research Laboratory (ESRL)
Average global atmospheric CO2 concentrations are also predicted to rise above 400ppm by 2016, from around 280ppm prior to the industrial revolution, and 390.4ppm in 2011.
I had to have a little rant about this landmark being passed on our blog, as this is far far earlier than anyone thought even vaguely possibly back in the 90's when I was studying climate change science and policy.
It's an absolute disgrace that the rate that atmospheric CO2 concentrations is rising increased significantly last decade after falling slightly in the 90s as the first wave of CO2 reduction measures kicked in.
Our politicians have been shown to be all mouth and no trousers on this issue, with any minor gains we've made in this country being massively offset by the amount of carbon emissions we've exported to china etc. as successive governments have continued to shift all the heavy industry out of this country.
Personally I hope that one day they'll be properly held to account for their inactivity on this issue, with punishment to fit the crime against humanity that they will have been shown to have perpetrated.
Full article - CO2 concentrations break through the 400ppm barrier for first time in 800,000 years