Workingman wrote:, there have been times when the concentration was higher, much higher.
Yep the Dinosaurs loved it, the earth basically had no ice caps and much of the planet was a marsh.
Excellent for hosting 8 billion humans on and keeping them fed.
The problem with using the shock figures of Mona Loa is that it has local impacts which can be called out as non representative.
However
If you take the global figure, which in April were
404.08, you are on much more solid ground.
The big one for me is that the average annual dip from the peak to the trough is only around 3ppm - 3.5ppm. We, who watch this stuff, had thought that we would see under 400ppm globally one more time, before it dropped off the radar for the next 10 to 15 thousand years. It seems we were overly optimistic and that 2016 may trough over 400ppm and 2017 will take it over 407 at a peak. Globally that is....
I wonder how people who are being flooded out, year after year, can ignore this news? The link is not even tenuous, it's absolute.