First Time: 400ppm CO2 in Atmosphere

May 10, 2013

NOAA announced today that the planetary carbon dioxide measurement has reached “400” for the first time in recorded history.  Here’s the link.

Of course actual recording of CO2 in the atmosphere goes back less than 100 years, but proxy readings from Antarctic & Greenland ice sheets show we haven’t seen this concentration in hundreds of thousands of years (or longer).  Note the current level is higher than the “current level” shown on the chart from several years back.  NOAA is the source of the image.


So as Cliff Mass up at the UW says…we’re conducting a grand experiment to see what happens when we pump our atmosphere full of carbon dioxide.  Time will tell.

Chief Meteorologist Mark Nelsen