Yesterday, at about the same time I was penning this article describing how CO2 levels were likely to exceed 400 PPM for most of 2015, a rather significant and abrupt CO2 spike was taking place at the Mauna Loa Observatory.
For on the evening of January 13, 2015, CO2 levels suddenly rocketed to nearly 404 parts per million.
The sudden upswing was certainly unexpected and rather significant — mimicking only the highest levels during 2014. These spikes came fully four months ahead of typical atmospheric CO2 peaks and seem rather ominous in the graph.
CO2 levels can be variable in the hourly measure. But this inflection was particularly strong — following a very high daily reading of 401.23 PPM on the 12th. Somewhat odd and rather early CO2 increases for 2015. A trend we will have to continue to watch.