Source: NOAA ESRL
Since November 1980, the world has experienced a 19.7% increase in atmospheric CO2 concentration. If we assume a pre-industrial CO2 concentration of 278 ppm, then we have undergone a 46% increase.
Source NOAA ERSL
The annual, five-year and decadal CO2 concentrations remain at historically high rates of increase. The annual change had dipped under 2 ppm during the past three months. The last time that had occurred (less than a 2 ppm increase) was December, 2014. The five year increase rate is back over 12 ppm, a rate first reached in November, 2013. Since November 2007, global CO2 has climbed over 22 ppm, a rate first achieved in August, 2016, and has mostly remained above the 22 ppm increase rate since that month.
Source: NOAA ESRL
If emissions continue at this rate we will experience our first month above 410 ppm in 2019. Here are the historical rates of increase for each 5 and 10 ppm based upon MLO and Global data as it became available, and the table, including an estimate for 2019.
We have blown past any CO2 concentration recorded in the past 400,000 years.
if we continue this rate of increase, we will add about 10 ppm every five years, and even at faster rates will soon move the planet into dangerous climate disruption territory.
While speculative, these business as usual or continued accelerating increases will severely damage global social stability by its impact. One can hope that the international community will soon take steps to slow and reverse the 2% GHG increase which occurred in 2017.
Source: Global Carbon Project
The struggle to balance economic growth while lowering emissions is difficult but necessary since climate sensitivity is creating social destabilization faster than anticipated. More on this another time.