Variation in the Keeling Curve

Rob Monroe over at the Scripps Institute blogged this in February, but I didn’t see it until this morning. I do get behind in my reading…

“The rate of growth in carbon dioxide concentrations in the atmosphere has accelerated since the beginnings of the Keeling Curve. The rate has gone from about 0.75 parts per million (ppm)/yr in 1959 to about 2.25ppm/yr today.”

…”this plot also shows that the growth rate (while staying positive) does vary quite a bit from year to year, something that is less evident in the Mauna Loa record. These variations are due to a combination of natural and human factors.”

800KC_LARGE_GROWTHRATE

Great. Something else to quarrel about. We’ve all been used to the Keeling Curve looking like a metronome. But it isn’t! Look how fast it rose in 1998!

Update: In case irony really is deficient, the key phrase in this post is, “The rate has gone from about 0.75 parts per million (ppm)/yr in 1959 to about 2.25ppm/yr today.”

CO2 reading on Apr. 29, 2015 was 400.62 ppm. Have a nice Sunday…

2 responses to “Variation in the Keeling Curve

  1. I remember seeing this years ago. It was used as an argument that co2 followed temperature and not the other way around.

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