Also in Hawaii; the first and longest continuously running atmospheric CO2 monitoring station.
https://scripps.ucsd.edu/programs/keelingcurve/
Link to CO2 monitoring page and discussion of the Keeling curve, named after the scientist who originally set up the CO2 observatory on the mountain. His son now manages the project.
Today's reading; 409.21ppm of Atmospheric CO2, very close to the highest ever recorded earlier this spring.
Keeling curve since inception;
View attachment 3959543
It's risen over 28% in just my lifetime.
Anyone see a trend?